Complexity in small-scale dwarf spheroidal galaxies (2009)
Koch, Andreas, Adén, Daniel, Grebel, Eva K., Feltzing, Sofia
Our knowledge about the chemical evolution of the more luminous dwarf spheroidal (dSph) galaxies is constantly growing. However, little is known about the enrichment of the ultrafaint systems...
Kalirai, Jason S., Zucker, Daniel B., Guhathakurta, Puragra, Geha, Marla, Kniazev, Alexei Y., Martinez-Delgado, David, ...
Andromeda X (And X) is a newly discovered low-luminosity M31 dwarf spheroidal galaxy (dSph) found by Zucker et al. (2007) in the Sloan Digital Sky Survey (SDSS - York et al. 2000). In this paper, we...
Structural Parameters of Seven SMC Intermediate-Age and Old Star Clusters (2009)
Glatt, Katharina, Grebel, Eva K., III., John S. Gallagher, Nota, Antonella, Sabbi, Elena, Sirianni, Marco, ...
We present structural parameters for the seven intermediate-age and old star clusters NGC121, Lindsay 1, Kron 3, NGC339, NGC416, Lindsay 38, and NGC419 in the Small Magellanic Cloud. We fit King...
Kniazev, Alexei, Brosch, Noah, Hoffman, G. Lyle, Grebel, Eva K., Zucker, Daniel B., Pustilnik, Simon A.
We investigate the spatial extent and structure of the Pegasus dwarf irregular galaxy using deep, wide-field, multicolour CCD photometry from the Sloan Digital Sky Survey (SDSS) and new deep HI...
The Seventh Data Release of the Sloan Digital Sky Survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
This paper describes the Seventh Data Release of the Sloan Digital Sky Survey (SDSS), marking the completion of the original goals of the SDSS and the end of the phase known as SDSS-II. It includes...
Haghi, Hosein, Baumgardt, Holger, Kroupa, Pavel, Grebel, Eva K., Hilker, Michael, Jordi, Katrin
We investigate the mean velocity dispersion and the velocity dispersion profile of stellar systems in MOND, using the N-body code N-MODY, which is a particle-mesh based code with a numerical MOND...
The seventh data release of the sloan digital sky survey (2009)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, An, Deokkeun, ...
Von Galilei bis Gaia: Die Erforschung unserer Galaxis (2009)
Studium Generale Wintersemester 2008/2009: Galileis erster Blick durchs Fernrohr und die Folgen heute, 12. Januar 2008 Prof. Eva K. Grebel, Zentrum für Astronomie der Universität Heidelberg Als...
Kinematic sub-populations in dwarf spheroidal galaxies (2008)
Ural, Ugur, Wilkinson, Mark I., Koch, Andreas, Gilmore, Gerard, Beers, Timothy C., Belokurov, Vasily, ...
We present new spectroscopic data for twenty six stars in the recently-discovered Canes Venatici I (CVnI) dwarf spheroidal galaxy. We use these data to investigate the recent claim of the presence of...
Age Determination of Six Intermediate-age SMC Star Clusters with HST/ACS (2008)
Glatt, Katharina, Grebel, Eva K., Sabbi, Elena, Gallagher, John S., Nota, Antonella, Sirianni, Marco, ...
We present a photometric analysis of the star clusters Lindsay 1, Kron 3, NGC339, NGC416, Lindsay 38, and NGC419 in the Small Magellanic Cloud (SMC), observed with the Hubble Space Telescope Advanced...
Kayser, Andrea, Hilker, Michael, Grebel, Eva K., Willemsen, Philip G.
Our work focuses on the understanding of the origin of CNO-anomalies, which have been detected in several Galactic globular clusters (GCs). This study is based on a homogeneous data set of hundreds...
What is a galaxy? How Cold is Cold Dark Matter? Recent progress in Near Field Cosmology (2008)
Gilmore, Gerard, Zucker, Dan, Wilkinson, Mark, Wyse, Rosemary F. G., Belokurov, Vasily, Kleyna, Jan, ...
There has been a vast recent improvement in photometric and kinematic data for star clusters, Ultra Compact dwarfs, galactic nuclei, and local dSph galaxies, with Subaru contributing substantially to...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Prieto, Carlos Allende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The Ghost of Sagittarius and Lumps in the Halo of the Milky Way (2008)
Heidi Jo Newberg, Connie Rockosi, Eva K. Grebel, Jon Brinkmann, Istvan Csabai, Greg Hennessy, ...
We identify new structures in the halo of the Milky Way Galaxy from positions, colors and magnitudes of five million stars detected in the Sloan Digital Sky Survey. Most of these stars are within...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The sixth data release of the sloan digital sky survey (2008)
Adelman-McCarthy, Jennifer K., Agüros, Marcel A., Allam, Sahar S., Allende Prieto, Carlos, Anderson, Kurt S. J., Anderson, Scott F., ...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The radial velocity experiment (rave): second data release (2008)
Zwitter, Tomaz, Siebert, Arnaud, Munari, Ulisse, Freeman, Kenneth C., Siviero, Alessandro, Watson, Fred G., ...
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature,...
The accretion origin of the Milky Way's stellar halo (2008)
Bell, Eric F., Zucker, Daniel B., Belokurov, Vasily, Sharma, Sanjib, Johnston, Kathryn V., Bullock, James S., ...
We have used data from the Sloan Digital Sky Survey (SDSS) Data Release 5 to explore the overall structure and substructure of the stellar halo of the Milky Way using ~4 million color-selected...
The sixth data release of the Sloan Digital Sky Survey (2008)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Prieto, Carlos Alende, Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Sixth Data Release of the Sloan Digital Sky Survey. With this data release, the imaging of the northern Galactic cap is now complete. The survey contains images and...
The radial velocity experiment (RAVE): second data release (2008)
Zwitter, Tomaz, Siebert, Arnaud, Munari, Ulisse, Freeman, Kenneth C., Siviero, Alessandro, Watson, Fred G., ...
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature,...
Eva K. Grebel, Doug Geisler, Dante Minniti
Old and new tools for understanding the evolution of stars
ASTRONOMY AND ASTROPHYSICS (2007)
A&A manuscript no. (will be inserted by hand later) Your thesaurus codes are:
Saurabh Jha, Peter M. Garnavich, Robert P. Kirshner, Peter Challis, Alicia M. Soderberg, Lucas M. Macri, ...
We present optical and near-infrared photometry and spectroscopy of the Type Ia SN 1998bu in the Leo I Group galaxy M96 (NGC 3368). The data set consists of 356 photometric measurements and 29...
Lisker, Thorsten, Grebel, Eva K., Binggeli, Bruno
We present an analysis of the optical colors of 413 Virgo cluster early-type dwarf galaxies (dEs), based on Sloan Digital Sky Survey imaging data. Our study comprises (1) a comparison of the...
A Wide-Field View of Leo II -- A Structural Analysis Using the SDSS (2007)
Coleman, Matthew G., Jordi, Katrin, Rix, Hans-Walter, Grebel, Eva K., Koch, Andreas
Using SDSS I data, we have analysed the stellar distribution of the Leo II dwarf spheroidal galaxy (distance of 233 kpc) to search for evidence of tidal deformation. The existing SDSS photometric...
The accretion origin of the Milky Way's stellar halo (2007)
Bell, Eric F., Zucker, Daniel B., Belokurov, Vasily, Sharma, Sanjib, Johnston, Kathryn V., Bullock, James S., ...
We have used data from the Sloan Digital Sky Survey (SDSS) Data Release 5 to explore the overall structure and substructure of the stellar halo of the Milky Way using about 4 million color-selected...
Lisker, Thorsten, Grebel, Eva K., Binggeli, Bruno, Glatt, Katharina
From a quantitative analysis of 413 Virgo cluster early-type dwarf galaxies (dEs) with Sloan Digital Sky Survey imaging data, we find that the dE class can be divided into multiple subpopulations...
The fifth data release of the sloan digital sky survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
Andromeda X, a new dwarf spheroidal satellite of M31: photometry (2007)
Zucker, Daniel B., Kniazev, Alexei Y., Martínez-Delgado, David, Bell, Eric F., Rix, Hans-Walter, Grebel, Eva K., ...
We report the discovery of Andromeda X, a new dwarf spheroidal satellite of M31, based on stellar photometry from the Sloan Digital Sky Survey. Using follow-up imaging data we have estimated its...
The Tully-Fisher relation and its residuals for a broadly selected sample of galaxies (2007)
Pizagno, James, Prada, Francisco, Weinberg, David H., Rix, Hans-Walter, Pogge, Richard W., Grebel, Eva K., ...
We measure the relation between galaxy luminosity and disk circular velocity (the Tully-Fisher [TF] relation), in the g, r, i, and z bands, for a broadly selected sample of galaxies from the Sloan...
A wide-field view of Leo II: a structural analysis using the Sloan Digital Sky Survey (2007)
Coleman, Matthew G., Jordi, Katrin, Rix, Hans-Walter, Grebel, Eva K., Koch, Andreas
Using SDSS I data, we have analyzed the stellar distribution of the Leo
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The Fifth Data Release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
The fifth data release of the Sloan Digital Sky Survey (2007)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fifth Data Release (DR5) of the Sloan Digital Sky Survey (SDSS). DR5 includes all survey quality data taken through 2005 June and represents the completion of the SDSS-I...
Empirical Color Transformations Between SDSS Photometry and Other Photometric Systems (2006)
Jordi, Katrin, Grebel, Eva K., Ammon, Karin
We present empirical color transformations between the Sloan Digital Sky Survey (SDSS) ugriz photometry and Johnson-Cousins UBVRI system and Becker's RGU system, respectively. Owing to the magnitude...
The Tully-Fisher Relation and Its Residuals for a Broadly Selected Sample of Galaxies (2006)
Pizagno, James, Prada, Francisco, Weinberg, David H., Rix, Hans-Walter, Pogge, Richard W., Grebel, Eva K., ...
We measure the relation between galaxy luminosity and disk circular velocity (the Tully-Fisher [TF] relation), in the g, r, i, and z-bands, for a broadly selected sample of galaxies from the Sloan...
Lisker, Thorsten, Glatt, Katharina, Westera, Pieter, Grebel, Eva K.
Despite the common picture of an early-type dwarf (dE) as a quiescent galaxy with no star formation and little gas, we identify 23 dEs that have blue central colors caused by recent or ongoing star...
The properties of the galaxies of the Local Group are reviewed, followed by a brief discussion of nearby groups. The galaxy groups in our vicinity - the M81 group, the Cen A group, and the IC...
Lisker, Thorsten, Grebel, Eva K., Binggeli, Bruno
We present a systematic search for disks in 476 Virgo cluster early-type dwarf (dE) galaxies. Disk features (spiral arms, edge-on disks, or bars) were identified by applying unsharp masks to a...
Andromeda X, A New Dwarf Spheroidal Satellite of M31: Photometry (2006)
Zucker, Daniel B., Kniazev, Alexei Y., Martinez-Delgado, David, Bell, Eric F., Rix, Hans-Walter, Grebel, Eva K., ...
We report the discovery of Andromeda X, a new dwarf spheroidal satellite of M31, based on stellar photometry from the Sloan Digital Sky Survey (SDSS). Using follow-up imaging data we have estimated...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
The fourth data release of the sloan digital sky survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
Planetary Nebulae in the Outer Disk and Halo of M31 (2006)
Kniazev, Alexei, Grebel, Eva K., Zucker, Dan, Bell, Eric, Harris, Hugh
We have developed a method to identify planetary nebula (PN) candidates in imaging data of the Sloan Digital Sky Survey (SDSS). This method exploits the SDSS's five-band sampling of emission lines in...
The Fourth Data Release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The radial velocity experiment (RAVE) : first data release (2006)
Steinmetz, Matthias, Zwitter, Tomaz, Siebert, Arnaud, Watson, Fred G., Freeman, Kenneth C., Munari, Ulisse, ...
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity,...
The radial velocity experiment (RAVE) : first data release (2006)
Steinmetz, Matthias, Zwitter, Tomaz, Siebert, Arnaud, Watson, Fred G., Freeman, Kenneth C., Munari, Ulisse, ...
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity,...
The radial velocity experiment (RAVE) : first data release (2006)
Steinmetz, Matthias, Zwitter, Tomaz, Siebert, Arnaud, Watson, Fred G., Freeman, Kenneth C., Munari, Ulisse, ...
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity,...
The radial velocity experiment (RAVE) : first data release (2006)
Steinmetz, Matthias, Zwitter, Tomaz, Siebert, Arnaud, Watson, Fred G., Freeman, Kenneth C., Munari, Ulisse, ...
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity,...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
The radial velocity experiment (RAVE) : first data release (2006)
Steinmetz, Matthias, Zwitter, Tomaz, Siebert, Arnaud, Watson, Fred G., Freeman, Kenneth C., Munari, Ulisse, ...
We present the first data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities and stellar atmosphere parameters (temperature, metallicity,...
The fourth data release of the Sloan Digital Sky Survey (2006)
Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., Annis, James, ...
This paper describes the Fourth Data Release of the Sloan Digital Sky Survey (SDSS), including all survey-quality data taken through 2004 June. The data release includes five-band photometric data...
A Search for PNe in Nearby Galaxies with SDSS Imaging Data (2005)
Kniazev, Alexei Y., Grebel, Eva K., Zucker, Daniel B., Bell, Eric F., Rix, Hans-Walter, Martinez-Delgado, David, ...
We present the latest results from our project to search for new planetary nebulae in nearby galaxies using Sloan Digital Sky Survey (SDSS) imaging data. Our method is based on photometric criteria...
Near-Field Cosmology with Local Group Dwarf Spheroidals (2005)
The Local Group offers an excellent laboratory for near-field cosmology by permitting us to use the resolved stellar content of its constituent galaxies as probes of galaxy formation and evolution,...
Stellar Populations in the Local Group of Galaxies (2005)
The characteristics and properties of the stellar populations and evolutionary histories of Local Group galaxies are summarized and compared to predictions of cosmological models. No clear signature...
The Arches Cluster - Evidence for a Truncated Mass Function? (2005)
Stolte, Andrea, Brandner, Wolfgang, Grebel, Eva K., Lenzen, Rainer, Lagrange, Anne-Marie
We have analyzed high-resolution, adaptive optics (AO) HK observations of the Arches cluster obtained with NAOS/CONICA. With a spatial resolution of 84 mas, the cluster center is uniquely resolved....
The colours of Virgo dEs as seen by SDSS (2005)
Lisker, Thorsten, Grebel, Eva K., Binggeli, Bruno
A colour analysis of a carefully selected sample of over 200 Virgo cluster dEs and 8 giant ellipticals (Es) in the SDSS yields the following results: a) the nucleated dEs (dENs) follow a tight...
Dark Matter and Stellar Mass in the Luminous Regions of Disk Galaxies (2005)
Pizagno, James, Prada, Francisco, Weinberg, David H., Rix, Hans-Walter, Harbeck, Daniel, Grebel, Eva K., ...
We investigate the correlations among stellar mass (M_*), disk scale length (R_d), and rotation velocity at 2.2 disk scale lengths (V_2.2) for a sample of 81 disk-dominated galaxies (disk/total >=...
Kniazev, Alexei Y., Grebel, Eva K., Pustilnik, Simon A., Pramskij, Alexander G., Zucker, Daniel B.
We present the results of high quality long-slit spectroscopy of planetary nebulae (PNe) and HII regions in the two dwarf irregular galaxies Sextans A and B, which belong to a small group of galaxies...
On the origin of the radial mass density profile of the Galactic halo Globular Cluster System (2005)
Parmentier, Genevieve, Grebel, Eva K.
We investigate what may be the origin of the presently observed spatial distribution of the mass of the Galactic Old Halo globular cluster system. We propose its radial mass density profile to be a...
The third data release of the sloan digital sky survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Third Data Release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Kniazev, Alexei Y., Grebel, Eva K., Pustilnik, Simon A., Pramskij, Alexander G., Zucker, Daniel B.
We present the results of high-quality long-slit spectroscopy of planetary nebulae (PNe) and H II regions in the two dwarf irregular (dIrr) galaxies Sextans A and B, which belong to a small group of...
Dark matter and stellar mass in the luminous regions of disk galaxies (2005)
Pizagno, James, Prada, Francisco, Weinberg, David H., Rix, Hans-Walter, Harbeck, Daniel, Grebel, Eva K., ...
We investigate the correlations among stellar mass (M*), disk scale length (Rd), and rotation velocity at 2.2 disk scale lengths (V2.2) for a sample of 81 disk-dominated galaxies (disk/total>=0.9)...
The Third Data Release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg2,...
Andromeda IX: Properties of the faintest M31 dwarf satellite galaxy (2005)
Harbeck, Daniel, Gallagher, John S., Grebel, Eva K., Koch, Andreas, Zucker, Daniel B.
We present WIYN observations of the recently discovered And IX dwarf spheroidal (dSph) satellite galaxy of M31. Our data, obtained at a natural seeing of 0.5" and just reaching the horizontal-branch...
The Arches cluster: Evidence for a truncated mass function? (2005)
Stolte, Andrea, Brandner, Wolfgang, Grebel, Eva K., Lenzen, Rainer, Lagrange, Anne-Marie
We have analyzed high-resolution, adaptive optics HK observations of the Arches cluster obtained with NAOS-CONICA. With a spatial resolution of 84 mas, the cluster center is uniquely resolved. From...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
The third data release of the Sloan Digital Sky Survey (2005)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
This paper describes the Third Data Release of the Sloan Digital Sky Survey (SDSS). This release, containing data taken up through 2003 June, includes imaging data in five bands over 5282 deg²,...
Spectroscopy of PNe in Sextans A, Sextans B, NGC 3109 and Fornax (2004)
Kniazev, Alexei Y., Grebel, Eva K., Pramskij, Alexander G., Pustilnik, Simon A.
Planetary nebulae (PNe) and HII regions provide a probe of the chemical enrichment and star formation history of a galaxy from intermediate ages to the present day. We present the first results of...
Impact of Reionization on the Stellar Populations of Nearby Dwarf Galaxies (2004)
Grebel, Eva K., Gallagher III, John S.
Cold dark matter models for galaxy formation predict that low-mass systems will be the first sites of star formation. As these objects have shallow gravitational potential wells, the subsequent...
Zaritsky, Dennis, Harris, Jason, Thompson, Ian B., Grebel, Eva K.
We present our catalog of U, B, V, and I stellar photometry of the central 64 sq. deg. area of the Large Magellanic Cloud. Internal and external astrometric and photometric tests using existing...
Andromeda IX: A New Dwarf Spheroidal Satellite of M31 (2004)
Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martinez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...
We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). Using both SDSS and public archival...
Kniazev, Alexei Y., Pustilnik, Simon A., Grebel, Eva K., Lee, Henry, Pramskij, Alexander G.
We present the first edition of the {S}DSS {H}II-galaxies with {O}xygen abundances {C}atalog (SHOC), which is a listing of strong emission-line galaxies (ELGs) from the Sloan Digital Sky Survey...
The Evolutionary History of Local Group Irregular Galaxies (2004)
Irregular (Irr) galaxies are gas-rich objects with recent or ongoing star formation. In absence of spiral density waves, star formation occurs largely stochastically. The scattered star-forming...
Harbeck, Daniel, Gallagher III, John S., Grebel, Eva K.
We report results of a photometric survey with the WIYN telescope for carbon stars in the M 31 dwarf spheroidal (dSph) companions And III, And V, And VI, and And VII, as well as in the relatively...
A New Giant Stellar Structure in the Outer Halo of M31 (2004)
Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martinez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...
The Sloan Digital Sky Survey has revealed an overdensity of luminous red giant stars ~ 3 degrees (40 projected kpc) to the northeast of M31, which we have called Andromeda NE. The line-of-sight...
A catalog of compact groups of galaxies in the SDSS commissioning data (2004)
Lee, Brian C., Allam, Sahar S., Tucker, Douglas L., Annis, James, Johnston, David E., Scranton, Ryan, ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...
A catalog of compact groups of galaxies in the SDSS commissioning data (2004)
Lee, Brian C., Allam, Sahar S., Tucker, Douglas L., Annis, James, Johnston, David E., Scranton, Ryan, ...
The Second Data Release of the Sloan Digital sky survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
Modeling the disruption of the globular cluster Palomar 5 by galactic tides (2004)
Dehnen, Walter, Odenkirchen, Michael, Grebel, Eva K., Rix, Hans-Walter
The globular cluster Palomar 5 is remarkable not only because of its extended massive tidal tails, but also for its very low mass and velocity dispersion, and its size, which is much larger than its...
Kniazev, Alexei Y., Grebel, Eva K., Pustilnik, Simon A., Pramskij, Alexander G., Kniazeva, Tamara F., Prada, Francisco, ...
In this paper we present results of a pilot study to use imaging data from the Sloan Digital Sky Survey (SDSS) to search for low surface brightness (LSB) galaxies. For our pilot study we use a test...
The second data release of the Sloan Digital Sky Survey (2004)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Kurt, Anderson, Scott F., ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg2 of five-band (ugriz) imaging data with photometry for...
Kniazev, Alexei Y., Pustilnik, Simon A., Grebel, Eva K., Lee, Henry, Pramskij, Alexander G.
We present the first edition of the SDSS H II galaxies with Oxygen abundances Catalog (SHOC), which is a listing of strong emission-line galaxies (ELGs) from the Sloan Digital Sky Survey (SDSS)....
Stolte, Andrea, Brandner, Wolfgang, Brandl, Bernhard, Zinnecker, Hans, Grebel, Eva K.
VLT/ISAAC JHKL photometry with subarcsecond resolution of the dense, massive starburst cluster NGC 3603 YC forming the core of the NGC 3603 giant molecular cloud is analyzed to reveal characteristics...
A catalog of compact groups of galaxies in the SDSS commissioning data (2004)
Lee, Brian C., Allam, Sahar S., Tucker, Douglas L., Annis, James, Johnston, David E., Scranton, Ryan, ...
Compact groups (CGs) of galaxies-relatively poor groups of galaxies in which the typical separations between members is of the order of a galaxy diameter-offer an exceptional laboratory for the study...
Andromeda IX: A new dwarf spheroidal satellite of M31 (2004)
Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martínez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...
We report the discovery of a new dwarf spheroidal satellite of M31, Andromeda IX, based on resolved stellar photometry from the Sloan Digital Sky Survey (SDSS). Using both SDSS and public archival...
A new giant stellar structure in the outer halo of M31 (2004)
Zucker, Daniel B., Kniazev, Alexei Y., Bell, Eric F., Martínez-Delgado, David, Grebel, Eva K., Rix, Hans-Walter, ...
The Sloan Digital Sky Survey has revealed an overdensity of luminous red giant stars ~3deg; (40 projected kpc) to the northeast of M31, which we have called Andromeda NE. The line-of-sight...
Kinematic study of the tidal tails of Palomar 5 (2004)
Kayser, Andrea, Grebel, Eva K., Odenkirchen, Michael, Dehnen, Walter, Rix, Hans-Walter
Not Available
Finkbeiner, Douglas P., Padmanabhan, Nikhil, Schlegel, David J., Carr, Michael A., Gunn, James E., Rockosi, Constance M., ...
The Sloan Digital Sky Survey (SDSS) mosaic camera and telescope have obtained five-band optical-wavelength imaging near the Galactic plane outside of the nominal survey boundaries. These additional...
Mass Segregation in the Globular Cluster Palomar 5 and its Tidal Tails (2004)
Koch, Andreas, Grebel, Eva K., Odenkirchen, Michael, Martínez-Delgado, David, Caldwell, John A. R.
We present the stellar main-sequence luminosity function (LF) of the disrupted, low-mass, low-concentration globular cluster Palomar 5 and its well-defined tidal tails, which emanate from the cluster...
The second data release of the Sloan Digital Sky Survey (2004)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...
The second data release of the Sloan Digital Sky Survey (2004)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Kurt S. J., Anderson, Scott F., ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its Second Data Release. This data release consists of 3324 deg(2) of five-band (ugriz) imaging data with photometry for...
On the C and N Abundances of 47 Tucanae Main Sequence Stars (2003)
Briley, Michael M., Harbeck, Daniel, Smith, Graeme H., Grebel, Eva K.
We report the results of an analysis of CN and CH band strengths among a large sample of 47 Tucanae main-sequence and turn-off stars presented earlier by Harbeck et al. The resulting C and N...
A catalog of compact groups of galaxies in the RSDSS commissioning data (2003)
Lee, Brian C., Allam, Sahar S., Tucker, Douglas L., Annis, James, Blanton, Michael R., Johnston, David E., ...
Compact groups (CGs) of galaxies -- relatively poor groups of galaxies in which the typical separations between members is of the order of a galaxy diameter -- offer an exceptional laboratory for the...
Kniazev, Alexei Y., Grebel, Eva K., Pustilnik, Simon A., Pramskij, Alexander G., Kniazeva, Tamara F., Prada, Francisco, ...
In this paper we present results of a pilot study to use imaging data from the Sloan Digital Sky Survey (SDSS) to search for low-surface-brightness (LSB) galaxies. For our pilot study we use a test...
Sagittarius Tidal Debris 90 kpc from the Galactic Center (2003)
Newberg, Heidi Jo, Yanny, Brian, Grebel, Eva K., Hennessy, Greg, Ivezic, Zeljko, Martinez-Delgado, David, ...
A new overdensity of A-colored stars in distant parts of the Milky Way's stellar halo, at a dereddened SDSS magnitude of g_0 = 20.3, is presented. Identification of associated variable RR Lyrae...
Pentericci, Laura, Rix, Hans W., Prada, Francisco, Fan, Xiaohui, Strauss, Michael A., Schneider, Donald P., ...
We present J-H-K' photometry for a sample of 45 high redshift quasars found by the Sloan Digital Sky Survey. The sample was originally selected on the basis of optical colors and spans a redshift...
CN Variations in NGC 7006 (2003)
Harbeck, Daniel, Smith, Graeme H., Grebel, Eva K.
Rotationally induced mixing with subsequent dredge-up of nucleosynthesized material is discussed as a second parameter of the horizontal branch morphology in globular clusters. CNO abundances have...
Discovery of Eight New Extremely Metal--Poor Galaxies in the Sloan Digital Sky Survey (2003)
Kniazev, Alexei Y., Grebel, Eva K., Hao, Lei, Strauss, Michael A., Brinkmann, Jonathan, Fukugita, Masataka
We report the discovery of eight new extremely metal-poor galaxies (XMPGs; 12+log(O/H) < 7.65) and the recovery of four previously known or suspected XMPGs (IZw18, HS0822+3542, HS0837+4717 and...
Nebular Abundances of Nearby Southern Dwarf Galaxies (2003)
Lee, Henry, Grebel, Eva K., Hodge, Paul
The results of optical spectroscopy of H II regions in a sample of southern dwarf irregulars consisting of five dwarf galaxies in the Centaurus A group, four dwarfs in the Sculptor group, and eight...
Observing the dark matter density profile of isolated galaxies (2003)
Prada, Francisco, Vitvitska, Mayrita, Klypin, Anatoly, Holtzman, Jon A., Schlegel, David J., Grebel, Eva K., ...
Using the Sloan Digital Sky Survey (SDSS), we probe the halo mass distribution by studying the velocities of satellites orbiting isolated galaxies. In a subsample that covers 2500 sq. degrees on the...
The Extended Tidal Tails of Palomar 5: Tracers of the Galactic Potential (2003)
Odenkirchen, Michael, Grebel, Eva K., Rix, Hans-Walter, Dehnen, Walter, Newberg, Heidi Jo, Rockosi, Constance M., ...
We detected extended, curved stellar tidal tails emanating from the sparse, disrupting halo globular cluster Pal 5, which cover 10 degrees on the sky. These streams allow us to infer the orbit of Pal...
The Progenitors of Dwarf Spheroidal Galaxies (2003)
Grebel, Eva K., Gallagher, John S., Harbeck, Daniel
Dwarf spheroidal (dSph) galaxies present an evolutionary puzzle that we explore in 40 early- and late-type dwarfs in the Local Group and nearby field. Although dSphs formed stars over extended...
A Low Latitude Halo Stream around the Milky Way (2003)
Yanny, Brian, Newberg, Heidi Jo, Grebel, Eva K., Kent, Steve, Odenkirchen, Michael, Rockosi, Connie M., ...
We present evidence for a ring of stars in the plane of the Milky Way, extending at least from l = 180 deg to l = 227 deg with turnoff magnitude $g \sim 19.5$; the ring could encircle the Galaxy. We...
search for pure disk galaxies Elektronische Daten (2003)
Kautsch, Stefan J., Grebel, Eva K., Astrophysics Conference
Poster von Kongress: Star and Structure Formation: From First Light to the Milky Way, Astrophysics Conference, August 18-22, 2003, ETH Zurich, Switzerland
Selection of Metal-poor Giant Stars Using the Sloan Digital Sky Survey Photometric System (2003)
Helmi, Amina, Ivezic, Zeljko, Prada, Francisco, Pentericci, Laura, Rockosi, Constance M., Schneider, Donald P., ...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The first data release of the sloan digital sky survey (2003)
Abazajian, Kevork, Adelman-McCarthy, Jennifer K., Agüeros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
Discovery of eight new extremely metal poor galaxies in the Sloan Digital Sky Survey (2003)
Kniazev, Alexei Y., Grebel, Eva K., Hao, Lei, Strauss, Michael A., Brinkmann, Jonathan, Fukugita, Masataka
We report the discovery of eight new extremely metal poor galaxies [XMPGs; 12+log(O/H) lt;7.65] and the recovery of four previously known or suspected XMPGs (I Zw 18, HS 0822+3542, HS 0837+4717, and...
Sagittarius tidal debris 90 kiloparsecs from the galactic center (2003)
Newberg, Heidi Jo, Yanny, Brian, Grebel, Eva K., Hennessy, Greg, Ivezic, Z., Martinez-Delgado, David, ...
A new overdensity of A-colored stars in distant parts of the Milky Way's stellar halo, at a dereddened Sloan Digital Sky Survey magnitude of g0=20.3, is presented. Identification of associated...
The extended tails of palomar 5: A 10° arc of globular cluster tidal debris (2003)
Odenkirchen, Michael, Grebel, Eva K., Dehnen, Walter, Rix, Hans-Walter, Yanny, Brian, Newberg, Heidi Jo, ...
Using wide-field photometric data from the Sloan Digital Sky Survey (SDSS), we recently showed that the Galactic globular cluster Palomar 5 is in the process of being tidally disrupted. Its tidal...
Observing the dark matter density profile of isolated galaxies (2003)
Prada, Francisco, Vitvitska, Mayrita, Klypin, Anatoly, Holtzman, Jon A., Schlegel, David J., Grebel, Eva K., ...
Using the Sloan Digital Sky Survey (SDSS), we probe the halo mass distribution by studying the velocities of satellites orbiting isolated galaxies. In a subsample that covers 2500 deg2 on the sky, we...
The first data release of the Sloan Digital Sky Survey (2003)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...
The first data release of the Sloan Digital Sky Survey (2003)
Abazajian, Kevork N., Adelman-McCarthy, Jennifer K., Agueros, Marcel A., Allam, Sahar S., Anderson, Scott F., Annis, James, ...
The Sloan Digital Sky Survey (SDSS) has validated and made publicly available its First Data Release. This consists of 2099 deg2 of five-band (u, g, r, i, z) imaging data, 186,240 spectra of...
CN abundance variations on the main sequence of 47 Tuc (2002)
Harbeck, Daniel, Smith, Graeme H., Grebel, Eva K.
We report on a deep spectroscopic survey for star-to-star CN variations along the main sequence (MS) of the globular cluster 47 Tuc with ESO's VLT. We find a significant bimodal distribution in the...
The Mass Function of the Arches Cluster from Gemini Adaptive Optics Data (2002)
Stolte, Andrea, Grebel, Eva K., Brandner, Wolfgang, Figer, Donald F.
We present the mass function (MF) of the Arches cluster obtained from ground-based adaptive optics data in comparison with results derived from HST/NICMOS data. A MF slope of Gamma = -0.8 +- 0.2 is...
A statistical study of binary and multiple clusters in the LMC (2002)
Dieball, Andrea, Mueller, Hardo, Grebel, Eva K.
Based on the Bica et al. (1999) catalogue we studied the star cluster system of the LMC and provide a new catalogue of all binary and multiple cluster candidates found. We performed Monte Carlo...
Kinematic study of the disrupting globular cluster Palomar 5 using VLT spectra (2002)
Odenkirchen, Michael, Grebel, Eva K., Dehnen, Walter, Rix, Hans-Walter, Cudworth, Kyle M.
Wide-field photometric data from the Sloan Digital Sky Survey have recently revealed that the Galactic globular cluster Palomar 5 is in the process of being tidally disrupted (Odenkirchen et al....
Dynamical Confirmation of SDSS Weak Lensing Scaling Laws (2002)
McKay, Timothy A., Sheldon, Erin Scott, Johnston, David, Grebel, Eva K., Prada, Francisco, Rix, Hans-Walter, ...
Galaxy masses can be estimated by a variety of methods; each applicable in different circumstances, and each suffering from different systematic uncertainties. Confirmation of results obtained by one...
Sloan Digital Sky Survey: Early data release (2002)
Stoughton, Chirs, Lupton, Rpbert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francsico J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...
Sloan Digital Sky Survey: Early Data Release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francisco J., ...
A Matched-Filter Analysis of the Tidal Tails of the Globular Cluster Palomar 5 (2002)
Rockosi, Constance M., Odenkirchen, Michael, Grebel, Eva K., Dehnen, Walter, Cudworth, Kyle M., Gunn, James E., ...
Kinematic Study of the Disrupting Globular Cluster Palomar 5 Using VLT Spectra (2002)
Odenkirchen, Michael, Grebel, Eva K., Dehnen, Walter, Rix, Hans-Walter, Cudworth, Kyle M.
Newberg, Heidi Jo, Yanny, Brian, Rockosi, Connie, Grebel, Eva K., Rix, Hans-Walter, Brinkmann, Jon, ...
Dynamical Confirmation of Sloan Digital Sky Survey Weak-lensing Scaling Laws (2002)
McKay, Timothy A., Sheldon, Erin Scott, Johnston, David, Grebel, Eva K., Prada, Francisco, Rix, Hans-Walter, ...
Proper motions in the knotty, bipolar jet in Henize 2-90 (2002)
Nyman, Lars-Ake, Tingay, Steven J., Brillant, Stephane, Grebel, Eva K., Brandner, Wolfgang, Livio, Mario, ...
Abstract not available.
Proper motions in the knotty, bipolar jet in Henize 2-90 (2002)
Nyman, Lars-Ake, Tingay, Steven J., Brillant, Stephane, Grebel, Eva K., Brandner, Wolfgang, Livio, Mario, ...
Abstract not available.
Proper motions in the knotty, bipolar jet in Henize 2-90 (2002)
Nyman, Lars-Ake, Tingay, Steven J., Brillant, Stephane, Grebel, Eva K., Brandner, Wolfgang, Livio, Mario, ...
Abstract not available.
Proper motions in the knotty, bipolar jet in Henize 2-90 (2002)
Nyman, Lars-Ake, Tingay, Steven J., Brillant, Stephane, Grebel, Eva K., Brandner, Wolfgang, Livio, Mario, ...
Abstract not available.
Sloan Digital Sky Survey: early data release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott M., Castander, Francisco J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈ 106 galaxies,...
Proper motions in the knotty, bipolar jet in Henize 2-90 (2002)
Nyman, Lars-Ake, Tingay, Steven J., Brillant, Stephane, Grebel, Eva K., Brandner, Wolfgang, Livio, Mario, ...
Abstract not available.
Sloan Digital Sky Survey: early data release (2002)
Stoughton, Chris, Lupton, Robert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott M., Castander, Francisco J., ...
The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of ≈ 106 galaxies,...
The Ghost of Sagittarius and Lumps in the Halo of the Milky Way (2001)
Newberg, Heidi Jo, Yanny, Brian, Rockosi, Constance M., Grebel, Eva K., Rix, Hans-Walter, Brinkmann, Jon, ...
We identify new structures in the halo of the Milky Way Galaxy from positions, colors and magnitudes of five million stars detected in the Sloan Digital Sky Survey. Most of these stars are within...
Zaritsky, Dennis, Harris, Jason, Thompson, Ian B., Grebel, Eva K., Massey, Philip
We present our catalog of U, B, V, and I stellar photometry of the central 18 sq. degree area of the Small Magellanic Cloud. We combine our data with the 2MASS and DENIS catalogs to provide, when...
Interstellar Media in the Magellanic Clouds and other Local Group Dwarf Galaxies (2001)
I review the properties of the interstellar medium in the Magellanic Clouds and Local Group dwarf galaxies. The more massive, star-forming galaxies show a complex, multi-phase ISM full of shells and...
Extragalactic Star Clusters: Speculations on the Future (2001)
Gallagher, John S., Grebel, Eva K.
We discuss the future possibilities for extragalactic star cluster research with the expected new ground-based and space-based telescopes and instrumentation. Significant gains are expected due to...
Odenkirchen, Michael, Grebel, Eva K., Harbeck, Daniel, Dehnen, Walter, Rix, Hans-Walter
We have investigated the spatial extent and structure of the Draco dwarf spheroidal galaxy using deep wide-field multicolor CCD photometry from the Sloan Digital Sky Survey (SDSS). Our study covers...
Dwarf Galaxies in the Local Group and in the Local Volume (2001)
After summarizing the characteristics of different types of dwarf galaxies I briefly review our current state of knowledge of dwarf galaxy evolution in the Local Group, for which we now have a fairly...
Five Years of Magellanic Clouds Research: A Newsletter Editors' Perspective (2001)
Grebel, Eva K., Chu, You-Hua, Gallagher, John S., Harbeck, Daniel
We analyze the topical and demographic evolution of Magellanic Clouds research over the past five years based on submissions of abstracts of refereed papers to the electronic Magellanic Clouds...
A Map of the Northern Sky: The Sloan Digital Sky Survey in Its First Year (2001)
The Sloan Digital Sky Survey (SDSS) is the largest and most ambitious optical CCD survey undertaken to date. It will ultimately map out one quarter of the sky with precision photometry in five bands,...
Brandner, Wolfgang, Grebel, Eva K., Barba, Rodolfo H., Walborn, Nolan R., Moneti, Andrea
We present the detection of an intermediate-mass pre-main-sequence population embedded in the nebular filaments surrounding the 30 Doradus region in the Large Magellanic Cloud (LMC) using HST/NICMOS....
UBVI and Ha Photometry of the h & chi Persei cluster (2001)
Keller, Stefan C., Grebel, Eva K., Miller, Grant, Yoss, Kenneth
UBVI and Ha photometry is presented for 17319 stars in vicinity of the young double cluster h & chi Persei. Our photometry extends over a 37arcmin x 1arcdeg field centered on the association. We...
The Star Cluster Systems of the Magellanic Clouds (2001)
Da Costa, G.S., Grebel, Eva K., Geisler, Doug, Minniti, Dante
The characteristics of the cluster systems of the Magellanic Clouds, as inferred from integrated properties, are compared with those from individual cluster studies and from the field population. The...
Star Formation Histories of Nearby Dwarf Galaxies (2000)
Properties of nearby dwarf galaxies are briefly discussed. Dwarf galaxies vary widely in their star formation histories, the ages of their subpopulations, and in their enrichment history....
A Critical Examination of Hypernova Remnant Candidates in M101. I. MF83 (2000)
Lai, Shih-Ping, Chu, You-Hua, Chen, C. H. Rosie, Ciardullo, Robin, Grebel, Eva K.
The SNR candidate MF83 in M101 is coincident with a very luminous X-ray source. Based on the high X-ray luminosity, it has been suggested that MF83 is a "hypernova remnant" requiring an explosion...
Local Group galaxies such as the Milky Way, the Magellanic Clouds, and M31 are being used by a number of international collaborations to search for microlensing events. Type and number of detections...
Hubble Space Telescope Photometry of the Dwarf Spheroidal Galaxy ESO 410-G005 (2000)
Karachentsev, Igor D., Sharina, Margarita E., Grebel, Eva K., Dolphin, Andrew E., Geisler, Doug, Guhathakurta, Puragra, ...
We present HST WFPC2 imaging of the nearby low-surface-brightness dwarf spheroidal galaxy ESO 410-G005, which has been resolved into stars for the first time. The resulting color-magnitude diagram...
The Star Formation History of the Local Group (2000)
The star formation histories of Local Group galaxies are summarized. The three large spirals are discussed individually, whereas the discussion of the Local Group dwarfs concentrates on differences...
Keck Studies of M31's Stellar Halo (2000)
Guhathakurta, Puragra, Reitzel, David B., Grebel, Eva K.
We present Keck 10-meter/LRIS spectra of candidate red giants in the halo of M31, located at a projected radius of R=19kpc on the minor axis. These spectroscopic targets have been selected using a...
Studies of binary star cluster candidates in the bar of the LMC. II (2000)
Dieball, Andrea, Grebel, Eva K.
Binary clusters account for more than 10 % of the cluster population in the Magellanic Clouds. Statistically fewer than 50 % of the found pairs are expected to be chance superpositions. We estimated...
Studies of Binary Star Cluster Candidates in the Bar of the LMC. I: SL 353 & SL 349 (2000)
Dieball, Andrea, Grebel, Eva K., Theis, Christian
We present a detailed study of the cluster pair SL 353 & SL 349. This candidate binary cluster is located at the northwestern rim of the LMC bar. Based on photometric data we find that both clusters...
The Morphologies of the Small Magellanic Cloud (2000)
Zaritsky, Dennis, Harris, Jason, Grebel, Eva K., Thompson, Ian B.
We compare the distribution of stars of different spectral types, and hence mean age, within the central SMC and find that the asymmetric structures are almost exclusively composed of young main...
Star Clusters in Local Group Galaxies (1999)
In about 40% of the Local Group galaxies star clusters have been detected so far, but the census is still incomplete. The properties of these clusters are briefly reviewed, and the impact of galaxy...
Hubble Space Telescope Photometry of Hodge 301: An "Old" Star Cluster in 30 Doradus (1999)
We present Hubble Space Telescope Planetary Camera UVI data for the little-studied cluster Hodge 301 3' northwest of 30 Doradus' central ionizing cluster R136. The average reddening of Hodge 301 is...
Evolutionary Histories of Dwarf Galaxies in the Local Group (1998)
The star formation histories of Local Group (LG) dwarf galaxies and more distant potential LG members are reviewed. Problems in defining the spatial extent of the LG and membership are briefly...
Properties of Two New M31 dSph Companions from Keck Imaging (1998)
Grebel, Eva K., Guhathakurta, Puragra
We have obtained Keck Low Resolution Imaging Spectrograph images in V and I of the newly discovered Local Group dwarf galaxies Pegasus dSph and Cassiopeia dSph and their surrounding field. The first...
The cluster pair SL 538/ NGC 2006 (SL 537) (1998)
Dieball, Andrea, Grebel, Eva K.
We studied in detail the binary cluster candidates SL 538 and NGC 2006 in the Large Magellanic Cloud (LMC). This cluster pair is located in the northwestern part of the large OB association LH 77 in...
Star Formation Histories of Local Group Dwarf Galaxies (1998)
40 galaxies are currently known as, or suspected to be Local Group members within a radius of 1.8 Mpc. 37 of these galaxies are dwarf galaxies with M_B > -18.5 mag. I present a compilation of the...
The Hourglass Nebulae of Sher 25 and SN 1987 A: Two of a Kind? (1997)
Brandner, Wolfgang, Chu, You-Hua, Eisenhauer, Frank, Grebel, Eva K., Points, Sean D.
We have performed a detailed study of the morphology and kinematics of the hourglass-shaped nebula around the blue supergiant Sher 25 in the galactic giant HII region NGC 3603. Near-infrared high...
Ring Nebula and Bipolar Outflows Associated with the B1.5 Supergiant Sher #25 in NGC 3603 (1996)
Brandner, Wolfgang, Grebel, Eva K., Chu, You-Hua, Weis, Kerstin
We have identified a ring-shaped emission-line nebula and a possible bipolar outflow centered on the B1.5 supergiant Sher #25 in the Galactic giant HII region NGC 3603 (distance 6 kpc). The clumpy...
Be star surveys with CCD photometry. II. NGC 1818 and its neighbouring cluster in the LMC (1996)
As part of an ongoing photometric survey of young Magellanic Cloud clusters we identified Be stars in NGC 1818 and a nearby smaller cluster in the Large Magellanic Cloud. The neighbouring cluster...
On the nature of the blue giants in NGC 330 (1995)
Grebel, Eva K., Roberts, Wm James, Brandner, Wolfgang
The young SMC cluster NGC 330 contains a number of blue stars that lie above the main-sequence turnoff found from our isochrone fitting and below the position of the blue supergiants. We used our...
Brandner, Wolfgang, Bouvier, Jerome, Grebel, Eva K., Tessier, Eric, De Winter, Dolf, Beuzit, Jean-Luc
Using adaptive optics at the ESO 3.6m telescope, we obtained diffraction limited JHK-images of the region around the Herbig AeBe star NX Pup. We clearly resolved the close companion (sep. 0.128") to...
Stellar population studies in nearby galaxies /--vorgelegt von Eva K. Grebel. (1995)
Thesis (Doctoral)--Rheinische Friedrich-Wilhelms-Universität zu Bonn, 1995.