A new low mass for the Hercules dSph: the end of a common mass scale for the dwarfs? (2009)
Adén, D., Wilkinson, M. I., Read, J. I., Feltzing, S., Koch, A., Gilmore, G. F., ...
We present a new mass estimate for the Hercules dwarf spheroidal galaxy (dSph), based on the revised velocity dispersion obtained by Aden et al. (2009, arXiv:0908.3489). The removal of a significant...
A photometric and spectroscopic study of the new dwarf spheroidal galaxy in Hercules (2009)
Adén, D., Feltzing, S., Koch, A., Wilkinson, M. I., Grebel, E. K., Lundström, I., ...
Our aim is to provide as clean and as complete a sample as possible of red giant branch stars that are members of the Hercules dSph galaxy. With this sample we explore the velocity dispersion and the...
Star Formation History of the SMC: six HST/ACS (2009)
Sabbi, E., Gallagher, J. S., Tosi, M., Anderson, J., Nota, A., Grebel, E. K., ...
We observed six fields of the Small Magellanic Cloud (SMC) with the Advanced Camera for Survey on board the Hubble Space Telescope in the F555W and F814W filters. These fields sample regions...
RAVE spectroscopy of luminous blue variables in the Large Magellanic Cloud (2009)
Munari, U., Siviero, A., Bienaymé, O., Binney, J., Bland-Hawthorn, J., Campbell, R., ...
CONTEXT: The RAVE spectroscopic survey for galactic structure and evolution obtains 8400-8800 Ang spectra at 7500 resolving power at the UK Schmidt Telescope using the 6dF multi-fiber positioner....
Jordi, K., Grebel, E. K., Hilker, M., Baumgardt, H., Frank, M., Kroupa, P., ...
We use the distant outer halo globular cluster Palomar 14 as a test case for classical versus modified Newtonian dynamics (MOND). Previous theoretical calculations have shown that the line-of-sight...
A constant dark matter halo surface density in galaxies (2009)
Donato, F., Gentile, G., Salucci, P., Martins, C. Frigerio, Wilkinson, M. I., Gilmore, G., ...
We confirm and extend the recent finding that the central surface density r_0*rho_0 galaxy dark matter halos, where r_0 and rho_0 are the halo core radius and central density, is nearly constant and...
Jordi, K., Grebel, E. K., Hilker, M., Baumgardt, H., Frank, M., Kroupa, P., ...
We use the distant outer halo globular cluster Palomar 14 as a test case for classical vs. modified Newtonian dynamics (MOND). Previous theoretical calculations have shown that the line-of-sight...
Scl-dE1 GC1: An Extended Globular Cluster in a Low-Luminosity Dwarf Elliptical Galaxy (2009)
Da Costa, G. S., Grebel, E. K., Jerjen, H., Rejkuba, M., Sharina, M. E.
We report the discovery from Hubble Space Telescope ACS images of an extended globular cluster, denoted by Scl-dE1 GC1, in the Sculptor Group dwarf Elliptical galaxy Scl-dE1 (Sc22). The distance of...
Discovery of the first symbiotic star in NGC6822 (2009)
Kniazev, A., Vaisanen, P., Whitelock, P. A., Menzies, J. W., Feast, M. W., Grebel, E. K., ...
We report the discovery of the first symbiotic star (V=21.6, K_S=15.8 mag) in the Local Group dwarf irregular galaxy NGC6822. This star was identified during a spectral survey of Ha emission-line...
The Highly Unusual Chemical Composition of the Hercules Dwarf Spheroidal Galaxy (2008)
Koch, A., McWilliam, A., Grebel, E. K., Zucker, D. B, Belokurov, V.
We report on the abundance analysis of two red giants in the faint Hercules dwarf spheroidal (dSph) galaxy. These stars show a remarkable deficiency in the neutron-capture elements, while the...
Siebert, A., Bienaymé, O., Binney, J., Bland-Hawthorn, J., Campbell, R., Freeman, K. C., ...
We present a measure of the inclination of the velocity ellipsoid at 1 kpc below the Galactic plane using a sample of red clump giants from the RAVE DR2 release. We find that the velocity ellipsoid...
Diffuse interstellar bands in RAVE Survey spectra (2008)
Munari, U., Tomasella, L., Fiorucci, M., Bienayme, O., Binney, J., Bland-Hawthorn, J., ...
We have used spectra of hot stars from the RAVE Survey in order to investigate the visibility and properties of five diffuse interstellar bands previously reported in the literature. The RAVE...
Tosi, M., Gallagher, J., Sabbi, E., Glatt, K., Grebel, E. K., Christian, C., ...
We introduce the SMC in space and time, a large coordinated space and ground-based program to study star formation processes and history, as well as variable stars, structure, kinematics and chemical...
The Radial Velocity Experiment (RAVE): second data release (2008)
Zwitter, T., Siebert, A., Munari, U., Freeman, K. C., Siviero, A., Watson, F. G., ...
We present the second data release of the Radial Velocity Experiment (RAVE), an ambitious spectroscopic survey to measure radial velocities (RVs) and stellar atmosphere parameters of up to one...
Koch, A., Grebel, E. K., Gilmore, G. F., Wyse, R. F. G., Kleyna, J. T., Harbeck, D. R., ...
We have obtained high-resolution spectroscopy of ten red giants in the Carina dwarf spheroidal (dSph) with UVES at the ESO/VLT. Here we present the abundances of O,Na,Mg,Si,Ca,Ti and Fe. By comparing...
Galactic kinematics with RAVE data: I. The distribution of stars towards the Galactic poles (2008)
Veltz, L., Bienaymé, O., Freeman, K. C., Binney, J., Bland-Hawthorn, J., Gibson, B. K., ...
We analyze the distribution of G and K type stars towards the Galactic poles using RAVE and ELODIE radial velocities, 2MASS photometric star counts, and UCAC2 proper motions. The combination of...
An Accurate Age Determination for the SMC Star Cluster NGC121 with HST/ACS (2008)
Glatt, K., Gallagher, J. S., Grebel, E. K., Nota, A., Sabbi, E., Sirianni, M., ...
As first Paper of a series devoted to study the old stellar population in clusters and fields in the Small Magellanic Cloud, we present deep observations of NGC121 in the F555W and F814W filters,...
The Radial Velocity Experiment (RAVE): second data release (2008)
Zwitter, T., Siebert, A., Munari, U., Freeman, K. C., Siviero, A., Watson, F. G., ...
Seabroke, G. M., Gilmore, G., Siebert, A., Bienayme, O., Binney, J., Bland-Hawthorn, J., ...
We have searched for in-falling stellar streams on to the local Milky Way disc in the CORAVEL and RAVE surveys. The CORAVEL survey consists of local dwarf stars (Nordstrom et al. Geneva-Copenhagen...
Stellar kinematics in the remote Leo II dwarf spheroidal galaxy -- Another brick in the wall (2007)
Koch, A., Kleyna, J. T., Wilkinson, M. I., Grebel, E. K., Gilmore, G. F., Evans, N. W., ...
We present the projected velocity dispersion profile for the remote (d=233kpc) Galactic dwarf spheroidal (dSph) galaxy Leo II, based on 171 discrete stellar radial velocities that were obtained from...
High-quality Spectrophotometry of the Planetary Nebula in the Fornax dSph (2007)
Kniazev, A. Y., Grebel, E. K., Pustilnik, S. A., Pramskij, A. G.
We present results of NTT spectroscopy of the one known planetary nebula (PN) in the dwarf spheroidal galaxy Fornax, a gas-deficient Local Group galaxy that stopped its star formation activity a few...
Lee, Henry, Zucker, D. B., Grebel, E. K.
We present results of optical spectroscopy of 35 H II regions from eight dwarf galaxies in the Centaurus A group. [O III]4363 A is detected in ESO272-G025 and ESO324-G024, and direct oxygen...
The RAVE survey : constraining the local Galactic escape speed (2007)
Smith, Martin C, Ruchti, Gregory R, Bienaymé, O, Binney, J, Bland-Hawthorn, J, Dehnen, W, ...
We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high-velocity stars from the RAVE survey and two previously published data sets. We use...
The RAVE Survey: Constraining the Local Galactic Escape Speed (2006)
Smith, M. C., Ruchti, G. R., Helmi, A., Wyse, R. F. G., Fulbright, J. P., Freeman, K. C., ...
We report new constraints on the local escape speed of our Galaxy. Our analysis is based on a sample of high velocity stars from the RAVE survey and two previously published datasets. We use...
Koch, A., Wilkinson, M. I., Kleyna, J. T., Gilmore, G. F., Grebel, E. K., Mackey, A. D., ...
We present low-resolution spectroscopy of 120 red giants in the Galactic satellite dwarf spheroidal (dSph) Leo I, obtained with the GeminiN-GMOS and Keck-DEIMOS spectrographs. We find stars with...
Complexity on Small Scales II: Metallicities and Ages in the Leo II Dwarf Spheroidal Galaxy (2006)
Koch, A., Grebel, E. K., Kleyna, J. T., Wilkinson, M. I., Harbeck, D. R., Gilmore, G. F., ...
We present metallicities and ages for 52 red giants in the remote Galactic dwarf spheroidal (dSph) galaxy Leo II. These stars cover the entire surface area of Leo II and are radial velocity members....
Observed Properties of Dark Matter: dynamical studies of dSph galaxies (2006)
Gilmore, G, Wilkinson, M, Kleyna, J, Koch, A, Evans, N. Wyn, Wyse, R. F. G., ...
The Milky Way satellite dwarf spheroidal (dSph) galaxies are the smallest dark matter dominated systems in the universe. We have underway dynamical studies of the dSph to quantify the shortest scale...
The mass profile of NGC1399 determined from globular cluster dynamics (2006)
B. Dirsch, T. Richtler, L. Infante, D. Minniti, M. Hilker, M. Rejkuba, ...
The mass profile of NGC1399 determined from globular cluster dynamics
The Age-Metallicity Relation of the SMC (2006)
Kayser, A., Grebel, E. K., Harbeck, D. R., Cole, A. A., Koch, A., Gallagher, J. S., ...
The Small Magellanic Cloud (SMC) is the only dwarf galaxy in the Local Group known to have formed and preserved populous star clusters continuously over the past 12 Gyr. These clusters provide a...
A Curious New Milky Way Satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
The Radial Velocity Experiment (RAVE): first data release (2006)
Steinmetz, M., Zwitter, T., Siebert, A., Watson, F. G., Freeman, K. C., Munari, U., ...
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,...
A New Milky Way Dwarf Satellite in Canes Venatici (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Sivarani, T., ...
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the North Galactic Cap using...
A Faint New Milky Way Satellite in Bootes (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Hodgkin, S., ...
In this Letter, we announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of 60 kpc. It was found in a systematic search for stellar overdensities in...
Does rotation of B stars depend on metallicity? preliminary results from GIRAFFE spectra (2006)
Royer, F., North, P., Melo, C., Grebel, E. K., De Medeiros, J. R., ...
We show the vsini distribution of main sequence B stars in sites of various metallicities, in the absolute magnitude range -3.34 < Mv < -2.17. These include Galactic stars in the field measured by...
The internal kinematics of dwarf spheroidal galaxies (2006)
Wilkinson, M. I., Kleyna, J. T., Evans, N. W., Gilmore, G. F., Read, J. I., Koch, A., ...
The status of kinematic observations in Local Group dwarf spheroidal galaxies (dSphs) is reviewed. Various approaches to the dynamical modelling of these data are discussed and some general features...
Wyse, Rosemary F. G., Gilmore, Gerard, Norris, John E., Wilkinson, M. I., Kleyna, Jan T., Koch, A., ...
The history of the Milky Way Galaxy is written in the properties of its stellar populations. Here we analyse stars observed as part of surveys of local dwarf spheroidal galaxies, but which from their...
A new Milky Way dwarf satellite in Canes Venatici (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Sivarani, T., ...
In this Letter, we announce the discovery of a new dwarf satellite of the Milky Way, located in the constellation Canes Venatici. It was found as a stellar overdensity in the north Galactic cap using...
A curious Milky Way satellite in Ursa Major (2006)
Zucker, D. B., Belokurov, V., Evans, N. W., Kleyna, J. T., Irwin, M. J., Wilkinson, M. I., ...
In this Letter, we study a localized stellar overdensity in the constellation of Ursa Major, first identified in Sloan Digital Sky Survey (SDSS) data and subsequently followed up with Subaru imaging....
A faint new Milky Way satellite in Bootes (2006)
Belokurov, V., Zucker, D. B., Evans, N. W., Wilkinson, M. I., Irwin, M. J., Hodgkin, S., ...
We announce the discovery of a new satellite of the Milky Way in the constellation of Bootes at a distance of ~60 kpc. It was found in a systematic search for stellar overdensities in the north...
The Radial Velocity Experiment (RAVE) : first data release (2006)
Steinmetz, M, Zwitter, T, Parker, Q. A, Bienayme, O, Roeser, S, Gibson, B. K, ...
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, M, Zwitter, T, Parker, Q. A, Bienayme, O, Roeser, S, Gibson, B. K, ...
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,...
Koch, A., Grebel, E. K., Wyse, R. F. G., Kleyna, J. T., Wilkinson, M. I., Harbeck, D., ...
The Carina dwarf spheroidal (dSph) galaxy is the only galaxy of this type that shows clearly episodic star formation separated by long pauses. Here we present metallicities for 437 radial velocity...
A Catalog of Edge-on Disk Galaxies: From Galaxies with a Bulge to Superthin Galaxies (2005)
Kautsch, S. J., Grebel, E. K., Barazza, F. D., Gallagher, J. S.
The formation and evolution of disk-dominated galaxies is difficult to explain, yet these objects exist. We therefore embarked on a study aimed at a better understanding of these enigmatic objects....
The highly anisotropic distribution and apparent alignment of the Galactic satellites in polar great planes begs the question how common such distributions are. The satellite system of M31 is the...
Andromeda IX: Properties of the Smallest M 31 Dwarf Satellite Galaxy (2005)
Harbeck, D., Gallagher, J., Grebel, E. K., Koch, A., Zucker, D.
We present WIYN observations of the recently discovered And IX dwarf spheroidal (dSph) satellite galaxy of M 31. Our data, obtained at a natural seeing of 0.5'' and just reaching the horizontal...
Using distant globular clusters as a test for gravitational theories (2005)
Baumgardt, H., Grebel, E. K., Kroupa, P.
We propose to determine the stellar velocity dispersions of globular clusters in the outer halo of the Milky Way in order to decide whether the dynamics of the universe on large scales is governed by...
A comprehensive model for the Monoceros tidal stream (2005)
Peñarrubia, J., Martínez-Delgado, D., Rix, H. W., Gómez-Flechoso, M. A., Munn, J., Newberg, H., ...
We have compiled an extensive data set on potential parts of the Monoceros tidal stream and performed an exhaustive survey of dwarf galaxy semianalytic orbits in order to constrain its orbital...
Chemical Evolution in the Carina Dwarf Spheroidal (2004)
Koch, A., Grebel, E. K., Harbeck, D., Wilkinson, M. I., Kleyna, J. T., Gilmore, G. F., ...
We present metallicities for 487 red giants in the Carina dwarf spheroidal (dSph) galaxy that were obtained from FLAMES low-resolution Ca triplet (CaT) spectroscopy. We find a mean [Fe/H] of -1.91...
A comprehensive model for the Monoceros tidal stream (2004)
Penarrubia, J., Martinez-Delgado, D., Rix, H. W., Gomez-Flechoso, M. A, Munn, J., Newberg, H., ...
We have compiled an extensive dataset on potential parts of the Monoceros tidal stream and performed an exhaustive survey of dwarf galaxy semi-analytic orbits in order to constrain its orbital...
Proper motions in the knotty bipolar jet in Hen 2-90 (2004)
Sahai, R., Brillant, S., Livio, M., Grebel, E. K., Brandner, W., Tingay, S., ...
Using second-epoch HST imaging of the unusual, bipolar jet source Hen 2-90, we have discovered proper motions of 0.03 arcsec yr-1 in the jet knots.
Mass Segregation in the Globular Cluster Palomar 5 and its Tidal Tails (2004)
Koch, A., Grebel, E. K., Odenkirchen, M., Martinez-Delgado, D., Caldwell, J. 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...
R-process and alpha-elements in the Galactic disk: Kinematic correlations (2004)
Recent studies of elemental abundances in the Galactic halo and in the Galactic disk have underscored the possibility to kinematically separate different Galactic subcomponents. Correlations between...
Kinematically Cold Populations at Large Radii in the Draco and Ursa Minor Dwarf Spheroidals (2004)
Wilkinson, M. I., Kleyna, J. T., Evans, N. W., Gilmore, G. F., Irwin, M. J., Grebel, E. K.
We present projected velocity dispersion profiles for the Draco and Ursa Minor (UMi) dwarf spheroidal galaxies based on 207 and 162 discrete stellar velocities, respectively. Both profiles show a...
Girardi, L., Grebel, E. K., Odenkirchen, M., Chiosi, C.
Following Paper I, we provide extended tables of bolometric corrections, extinction coefficients, stellar isochrones, and integrated magnitudes and colours of single-burst stellar populations, for...
Modeling the disruption of the globular cluster Pal5 by Galactic tides (2004)
Dehnen, W., Odenkirchen, M., Grebel, E. K., Rix, H-W.
In order to understand the extended massive tidal tails of the globular cluster Pal5, its very low mass and velocity dispersion, and its size, which is much larger than the theoretical tidal radius,...
The Globular Cluster System of NGC 1399: III. VLT Spectroscopy and Database (2004)
Dirsch, B., Richtler, T., Geisler, D., Gebhardt, K., Hilker, M., Alonso, M. V., ...
Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very Large Telescope....
Richtler, T., Dirsch, B., Gebhardt, K., Geisler, D., Hilker, M., Alonso, M. V., ...
We study the kinematics and dynamics of the globular cluster system of NGC 1399, the central galaxy of the Fornax cluster. The observational data consists of medium resolution spectra, obtained at...
Planetary nebulae in the outer disk and halo of M31 (2004)
Grebel, E. K., Kniazev, A. Y., Zucker, D. B., Bell, E. F., Harris, H. C.
We developed a method to identify planetary nebula (PN) candidates in imaging data of the Sloan Digital Sky Survey (SDSS). This method exploits the SDSS' five-band sampling of emission lines in PN...
Girardi, L., Grebel, E. K., Odenkirchen, M., Chiosi, C.
Following Paper I, we provide extended tables of bolometric corrections, extinction coefficients, stellar isochrones, and integrated magnitudes and colours of single-burst stellar populations, for...
A calibration map for Wide Field Imager photometry (2004)
Koch, A., Odenkirchen, M., Grebel, E. K., Caldwell, J. A. R.
We present a prescription to correct large-scale intensity variations affecting imaging data taken with the Wide Field Imager (WFI) at the MPG/ESO 2.2 m telescope at the European Southern Observatory...
The globular cluster system of NGC 1399. III. VLT spectroscopy and database (2004)
Dirsch, B., Richtler, T., Geisler, D., Gebhardt, K., Hilker, M., Alonso, M. V., ...
Radial velocities of 468 globular clusters around NGC 1399, the central galaxy in the Fornax cluster, have been obtained with FORS2 and the Mask Exchange Unit (MXU) at the ESO Very Large Telescope....
Correcting spatial gradients (2004)
Koch, A., Grebel, E. K., Odenkirchen, M., Caldwell, J. A. R.
We present a method to significantly reduce large-scale photometric variations seriously affecting imaging data from the Wide Field Imager (WFI). The primary source for these gradients is non-uniform...
Galactic halo substructure from A-F stars in the SDSS (2004)
Newberg, H. J., Yanny, B., Grebel, E. K., Martínez-Delgado, D., Odenkirchen, M.
A Catalog of Compact Groups of Galaxies in the SDSS Commissioning Data (2003)
Lee, B. C., Allam, S. S., Tucker, D. L., Annis, J., Blanton, M. R., Johnston, D. 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...
A calibration map for Wide Field Imager photometry (2003)
Koch, A., Odenkirchen, M., Grebel, E. K., Caldwell, J. A. R.
We present a prescription to correct large-scale intensity variations affecting imaging data taken with the Wide Field Imager (WFI) at the MPG/ESO 2.2 m telescope at the European Southern Observatory...
The luminosity function of Palomar 5 and its tidal tails (2003)
Koch, A., Odenkirchen, M., Grebel, E. K., Martinez-Delgado, D., Caldwell, J. A. R.
We present the main sequence luminosity function of the tidally disrupted globular cluster Palomar 5 and its tidal tails. For this work we analyzed imaging data obtained with the Wide Field Camera at...
The tidal perturbation of the low-mass globular cluster NGC 5466 (2003)
Odenkirchen, M., Grebel, E. K.
The distribution of stars in the outer part of the sparse globular cluster NGC 5466 provides evidence for possible tidal mass loss after a recent disk-shock near the solar circle.
The extended tails of Palomar 5: A ten degree arc of globular cluster tidal debris (2003)
Odenkirchen, M., Grebel, E. K., Dehnen, W., Yanny, B., Newberg, H., ...
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...
Distances to Nearby Galaxies in Sculptor (2003)
Karachentsev, I. D., Grebel, E. K., Sharina, M. E., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
A Search for Ionized Gas in the Draco and Ursa Minor Dwarf Spheroidal Galaxies (2003)
Gallagher, J. S., Madsen, G. J., Reynolds, R. J., Grebel, E. K., Smecker-Hane, T. A.
The Wisconsin H Alpha Mapper has been used to set the first deep upper limits on the intensity of diffuse H alpha emission from warm ionized gas in the Local Group dwarf spheroidal galaxies (dSphs)...
NAOS-CONICA performance in a crowded field – the Arches cluster (2003)
Stolte, A., Brandner, W., Grebel, E.K., Figer, Don F., Eisenhauer, F., Lenzen, R., ...
A search for ionized gas in the Draco and Ursa Minor dwarf spheroidal galaxies (2003)
Gallagher, J.S., Madsen, G.J., Reynolds, R.J., Grebel, E.K., Smecker-Hane, T.A.
Selection of metal-poor giant stars using the Sloan Digital Sky Survey photometric system (2003)
Helmi, A., Ivezic, Z., Prada, F., Pentericci, L., Rockosi, C.M., Schneider, D.P., ...
Distances to nearby galaxies in sculptor (2003)
Karachentsev, I.D., Grebel, E.K., Sharina, M.E., Dolphin, A.E., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of nine nearby galaxies in Sculptor. We derive their distances from the luminosity of the tip of the red giant branch stars with a...
Local galaxy flows within 5 Mpc (2003)
Karachentsev, I.D., Makarov, D.I., Sharina, M.E., Dolphin, A.E., Grebel, E.K., Geisler, D., ...
Galaxy flow in the Canes Venatici I cloud (2003)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
The metallicity-luminosity relation for low surface brightness galaxies (2003)
Kniazev, A. Y., Grebel, E. K., Pramskij, A. G., Pustilnik, S. A.
We present the latest results from our survey for Low Surface Brightness Galaxies in the Sloan Digital Sky Survey (SDSS). We used public SDSS imaging data to establish a sample of all galaxies with...
Tidal dwarfs in the M81 group: The second generation? (2003)
Makarova, L., Grebel, E.K., Karachentsev, I.D., Dolphin, A.E., Karachentseva, V.E., Sharina, M.E., ...
Pentericci, L., Prada, F., Fan, X., Strauss, M. A., Schneider, D. 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...
NAOS-CONICA performance in a crowded field - the Arches cluster (2003)
Stolte, A., Brandner, W., Grebel, E. K., Figer, Don F., Eisenhauer, F., Lenzen, R., ...
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A low-latitude halo stream around the Milky Way (2003)
Yanny, B., Newberg, H.J., Grebel, E.K., Kent, S., Odenkirchen, M., Rockosi, C.M., ...
The halo of M 31 as seen by SDSS (2003)
Zucker, D. B., Bell, E., Grebel, E. K., Kniazev, A. Y., Martinez-Delgado, D., ...
The Sloan Digital Sky Survey (SDSS) 2.5m telescope observed a stripe approximately 2.5 degrees wide along the major axis of M 31, and the resulting images were processed through the SDSS pipeline. We...
The extended tidal tails of Palomar 5: Tracers of the galactic potential (2003)
Odenkirchen, M., Grebel, E. K., Dehnen, W., Newberg, H. J., Rockosi, C. M., ...
Palomar 5 and its tidal tails: New observational results (2003)
Odenkirchen, M., Grebel, E. K., Dehnen, W., Rix, H. W., Rockosi, C. M., Newberg, H., ...
Selection of Metal-poor Giant Stars Using the Sloan Digital Sky Survey Photometric System (2002)
Helmi, A., Ivezic, Z., Prada, F., Pentericci, L., Rockosi, C. M., Schneider, D. P., ...
We present a method for photometric selection of metal-poor halo giants from the imaging data of the Sloan Digital Sky Survey (SDSS). These stars are offset from the stellar locus in the (g-r) vs....
Local galaxy flows within 5 Mpc (2002)
Karachentsev, I. D., Makarov, D. I., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of sixteen dwarf galaxies as part of our snapshot survey of nearby galaxy candidates. We derive their distances from the luminosity of the tip of the...
Galaxy Flow in the Canes Venatici I Cloud (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
We present an analysis of Hubble Space Telescope/WFPC2 images of eighteen galaxies in the Canes Venatici I cloud. We derive their distances from the luminosity of the tip of the red giant branch...
Tidal dwarfs in the M81 group: the second generation? (2002)
Makarova, L. N., Grebel, E. K., Karachentsev, I. D., Dolphin, A. E., Karachentseva, V. E., Sharina, M. E., ...
We derive quantitative star formation histories of the four suspected tidal dwarf galaxies in the M81 group, HolmbergIX, BK3N, Arp-loop (A0952+69), and Garland, using Hubble Space Telescope/Wide...
Palomar 5 and its tidal tails: New observational results (2002)
Odenkirchen, M., Grebel, E. K., Dehnen, W., Rockosi, C. M., Newberg, H., ...
Sloan Digital Sky Survey data for the field of the globular cluster Pal 5 reveal the existence of a long massive stream of tidal debris spanning an arc of 10 degrees on the sky. Pal 5 thus provides...
Mass Function of the Arches Cluster from Gemini Adaptive Optics Data (2002)
Stolte, A., Grebel, E. K., Brandner, W., Figer, D. F.
We have analysed high resolution adaptive optics (AO) science demonstration data of the young, massive stellar cluster Arches near the Galactic Center, obtained with the Gemini North telescope in...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
We present Hubble Space Telescope/WFPC2 images of eighteen galaxies situated in the vicinity of the Local Group (LG) as part of an ongoing snapshot survey of nearby galaxies. Their distances derived...
Surface photometry of new nearby dwarf galaxies (2002)
Makarova, L. N., Karachentsev, I. D., Grebel, E. K., Barsunova, O. Yu.
We present CCD surface photometry of 16 nearby dwarf galaxies, many of which were only recently discovered. Our sample comprises both isolated galaxies and galaxies that are members of nearby galaxy...
Sloan Digital Sky Survey: Early data release (2002)
Stoughton, C., Lupton, R. H., Bernardi, M., Blanton, M. R., Burles, S., Castander, F. 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...
The IMF in Young Massive Star Forming Regions (2002)
Stolte, A., Grebel, E.K., Brandner, W., Iwamuro, F., Maihara, T., Motohara, K.
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2002)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
Proper Motions in the Knotty, Bipolar Jet in Henize 2-90 (2002)
Sahai, R., Brillant, S., Livio, M., Grebel, E. K., Brandner, W., Tingay, S., ...
The Extended Tails of Palomar 5: A Ten Degree Arc of Globular Cluster Tidal Debris (2002)
Odenkirchen, M., Grebel, E. K., Dehnen, W., Rix, H. W., Rockosi, C. M., Newberg, H., ...
Surface photometry of new nearby dwarf galaxies (2002)
Makarova, L. N., Karachentsev, I. D., Grebel, E. K., Barsunova, O. Yu.
We present CCD surface photometry of 16 nearby dwarf galaxies, many of which were only recently discovered. Our sample is comprised of both isolated galaxies and galaxies that are members of nearby...
A New Extremely Low-Metallicity Galaxy Discovered in the SDSS (2002)
Kniazev, A. Y., Grebel, E. K., Hao, L., Strauss, M. A.
The SDSS spectroscopic database, which will ultimately contain spectra of one million galaxies, provides an ideal resource for searches for extremely low-metallicity galaxies. Using the current...
The M 81 group of galaxies: New distances, kinematics and structure (2002)
Karachentsev, I. D., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., Hodge, P. W., ...
New distances to galaxies in the Centaurus A group (2002)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Grebel, E. K., Geisler, D., Guhathakurta, P., ...
The very local Hubble flow (2002)
Karachentsev, I. D., Sharina, M. E., Makarov, D. I., Dolphin, A. E., Grebel, E. K., Geisler, D., ...
The mass profile of NGC1399 determined from globular cluster dynamics (2002)
Alonso , M.V., Dirsch , B., Gebhardt , K., Grebel , E.K., Hilker , M., Infante , L., ...
The Stellar Populations of the Cetus Dwarf Spheroidal Galaxy (2001)
Sarajedini, A., Grebel, E. K., Dolphin, A. E., Seitzer, P., Geisler, D., Guhathakurta, P., ...
We present Hubble Space Telescope Wide Field Planetary Camera 2 photometry in the V and I passbands of the recently discovered Local Group dwarf spheroidal galaxy in Cetus. Our color-magnitude...
A new galaxy near the Local Group in Draco (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We present HST WFPC2 and ground-based images of the low surface brightness dwarf Irr/Sph galaxy KKR~25 in Draco. Its colour-magnitude diagram shows red giant branch stars with the tip at I = 22.32...
Population Gradients in Local Group Dwarf Spheroidals (2001)
Harbeck, D., Grebel, E. K., Holtzman, J., Guhathakurta, P., Brandner, W., Geisler, D., ...
We present a systematic and homogeneous analysis of population gradients for the Local Group dwarf spheroidals (dSphs) Carina, Sculptor, Sextans, Tucana, Andromeda I-III, V, and VI. For all of the...
Spectroscopy of Globular Clusters in NGC 1399 - A Progress Report (2001)
Richtler, T., Dirsch, B., Geisler, D., Gebhardt, K., Hilker, M., Infante, L., ...
We performed spectroscopy of globular clusters associated with NGC 1399 and measured radial velocities of more than 400 clusters, the largest sample ever obtained for dynamical studies. In this...
WFPC2 Observations of Two dSph Galaxies in the M81 Group (2001)
Karachentsev, I. D., Sharina, M. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Hodge, P. W., ...
We have obtained HST WFPC2 and ground-based images of two low surface brightness dwarf spheroidal galaxies in the M81 group, FM1 and KKH57. Their colour-magnitude diagrams show red giant branches...
The Stellar Content and Distance of UGC 4483 (2000)
Dolphin, A. E., Makarova, L., Karachentsev, I. D., Karachentseva, V. E., Geisler, D., Grebel, E. K., ...
We present HST/WFPC2 observations of UGC 4483, an irregular galaxy in the M81/NGC 2403 complex. Stellar photometry was carried out with HSTphot, and is complete to V ~ 26.0 and I ~ 24.7. We measure...
Odenkirchen, M., Grebel, E. K., Rockosi, C. M., Dehnen, W., Ibata, R., ...
We report the discovery of two well-defined tidal tails emerging from the sparse remote globular cluster Palomar 5. These tails stretch out symmetrically to both sides of the cluster in the direction...
Dwarf Spheroidal Galaxies in the M81 Group Imaged with WFPC2 (2000)
Karachentsev, I. D., Karachentseva, V. E., Dolphin, A. E., Geisler, D., Grebel, E. K., Guhathakurta, P., ...
We obtained HST/WFPC2 images of the dwarf spheroidal (dSph) galaxies K61, K63, K64, DDO78, BK6N, and kk77 in the M81 group. Our color-magnitude diagrams show red giant branches with tips (TRGB)...
Dynamical Mass Estimates for the Halo of M31 from Keck Spectroscopy (2000)
Evans, N. W., Wilkinson, M. I., Guhathakurta, P., Grebel, E. K., Vogt, S. S.
The last few months have seen the measurements of the radial velocities of all of the dwarf spheroidal companions to the Andromeda galaxy (M31) using the spectrographs (HIRES and LRIS) on the Keck...
A Dwarf Galaxy Survey in the Local Volume (2000)
Grebel, E. K., Seitzer, P., Dolphin, A. E., Geisler, D., Guhathakurta, P., Hodge, P. W., ...
We are carrying out a comprehensive multi-wavelength study of dwarf galaxies in the Local Volume (< 5 Mpc). After our all-sky survey more than doubled the dwarf census we are now measuring structural...
The dwarf spheroidal galaxy DDO 44: stellar populations and distance (1999)
Karachentsev, I. D., Sharina, M. E., Grebel, E. K., Dolphin, A. E., Geisler, D., Guhathakurta, P., ...
We present ground-based and HST WFPC2 imaging of the nearby low surface brightness dwarf spheroidal galaxy DDO 44. For the first time DDO 44 was resolved into stars. The resulting color-magnitude...
HST/WFPC2 and VLT/ISAAC observations of PROPLYDS in the giant HII region NGC 3603 (1999)
Brandner, W., Grebel, E. K., Dottori, H., Brandl, B., Richling, S., ...
We report the discovery of three proplyd-like structures in the giant HII region NGC 3603. The emission nebulae are clearly resolved in narrow-band and broad-band HST/WFPC2 observations in the...
V, I CCD photometry of metal-rich bulge globular clusters: NGC 6553 (1999)
Sagar, R, Subramaniam, A, Richtler, T, Grebel, E. K
We have carried out VI CCD photometry of about 40 000 stars down to V ~ 23 mag in an area of about 6' x 10' centered on the metal-rich Galactic bulge globular cluster NGC 6553 and an adjacent field...
A Comprehensive Model for the Monoceros Tidal Stream (1998)
Penarrubia, J., Martinez-Delgado, D., Rix, H. W., Gomez-Flechoso, M. A., Munn, J., Newberg, H., ...
In a ACDM universe, the inner regions of massive galaxies like the Milky Way gain a large fraction of their mass through tidal disruption and accretion of a large number of low-mass fragments (e.g.,...
VI CCD photometry of metal-rich globular clusters: NGC 6528 (1998)
Richtler, T, Grebel, E. K, Subramaniam, A, Sagar, R
We present CCD photometry in V and I for the metal-rich globular cluster NGC 6528. A comparison with previous photometry reveals discrepancies of the order 0.1 to 0.2 mag in V, emphasizing the need...
CIV absorption from hot gas inside supergiant shell LMC4 observed with HST and IUE (1996)
Bomans, D. J., De Boer, K. S., Koornneef, J., Grebel, E. K.
High resolution ultraviolet spectra with HST-GHRS of two stars in the direction of the supergiant shell LMC4 unambiguously show absorption by substantial quantities of CIV gas at velocities near the...
Brandner, W., Bouvier, J., Grebel, E. K., Tessier, E., De Winter, D.
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...
Bobrowsky, M., Zijlstra, A. A., Grebel, E. K., Tinney, C. G., Hekkert, P. Te Lintel, Van De Steene, G. C., ...
We present spectra and high-resolution images taken with HST, the NTT, the VLA, and the MPIA/ESO 2.2m of the emission-line star He 3-1475 which we suggest is a post-AGB star. The star is at the...