Metallicity Mapping with gri Photometry: The Virgo Overdensity and the Halos of the Galaxy (2009)
Beers, Timothy C., An, Deokkeun, Johnson, Jennifer A., Pinsonneault, Marc H., Terndrup, Donald M., Delahaye, Franck, ...
We describe the methodology required for estimation of photometric estimates of metallicity based on the SDSS gri passbands, which can be used to probe the properties of main-sequence stars beyond ~...
Johnson, Jennifer A., Dong, Subo, Gould, Andrew
Finite source effects can be important in observations of gravitational microlensing of stars. Near caustic crossings, for example, some parts of the source star will be more highly magnified than...
Chemical Composition of Faint (I~21 mag) Microlensed Bulge Dwarf OGLE-2007-BLG-514S (2009)
Epstein, Courtney R., Johnson, Jennifer A., Dong, Subo, Udalski, Andrzej, Gould, Andrew, Becker, George
We present a high-resolution spectrum of a microlensed G dwarf in the Galactic bulge with spectroscopic temperature T_eff = 5600 +/- 180 K. This I~21 mag star was magnified by a factor ranging from...
A Photometric Metallicity Estimate of the Virgo Stellar Overdensity (2009)
An, Deokkeun, Johnson, Jennifer A., Beers, Timothy C., Pinsonneault, Marc H., Terndrup, Donald M., Delahaye, Franck, ...
We determine photometric metal abundance estimates for individual main-sequence stars in the Virgo Overdensity (VOD), which covers almost 1000 deg^2 on the sky, based on a calibration of the...
Cohen, Judith G., Thompson, Ian B., Sumi, Takahiro, Bond, Ian, Gould, Andrew, Johnson, Jennifer A., ...
We present abundance analyses based on high dispersion and high signal-to-noise ratio Magellan spectra of two highly microlensed Galactic bulge stars in the region of the main-sequence turnoff with...
Johnson, Jennifer A, Vnencak-Jones, Cindy L, Cogan, Joy D, Loyd, James E, West, James
Abstract Background Copy-number variations (CNVs) are structural variations in the genome involving 1 kb to 3 mb of DNA. CNV has been reported within intron 1 of the BMPR2 gene. We propose that CNV...
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...
Tracing Sagittarius Structure with SDSS and SEGUE Imaging and Spectroscopy (2009)
Yanny, Brian, Newberg, Heidi Jo, Johnson, Jennifer A., Lee, Young Sun, Beers, Timothy C., Bizyaev, Dmitry, ...
We show that the Sagittarius dwarf tidal stream can be traced with very red K/M-giant stars selected from SDSS photometry. A subset of these stars are spectroscopically confirmed with SEGUE and SDSS...
An, Deokkeun, Pinsonneault, Marc H., Masseron, Thomas, Delahaye, Franck, Johnson, Jennifer A., Terndrup, Donald M., ...
We perform an extensive test of theoretical stellar models for main-sequence stars in ugriz, using cluster fiducial sequences obtained in the previous paper of this series. We generate a set of...
A Unique Star in the Outer Halo of the Milky Way (2009)
Lai, David K., Rockosi, Constance M., Bolte, Michael, Johnson, Jennifer A., Beers, Timothy C., Lee, Young Sun, ...
As part of a program to measure abundance ratios in stars beyond 15 kpc from the Galactic center, we have discovered a metal-poor star in the outer halo with a unique chemical signature. We...
Cohen, Judith G., Thompson, Ian B., Sumi, Takahiro, Bond, Ian, Gould, Andrew, Johnson, Jennifer A., ...
We present abundance analyses based on high dispersion and high signal-to-noise ratio Magellan spectra of two highly microlensed Galactic bulge stars in the region of the main sequence turnoff with...
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, ...
An, Deokkeun, Johnson, Jennifer A., Clem, James L., Yanny, Brian, Rockosi, Constance M., Morrison, Heather L., ...
We present photometry for globular and open cluster stars observed with the Sloan Digital Sky Survey (SDSS). In order to exploit over 100 million stellar objects with r < 22.5 mag observed by SDSS,...
Nitrogen abundances in giant stars of the globular cluster NGC 6752 (2008)
Yong, David, Grundahl, Frank, Johnson, Jennifer A., Asplund, Martin
We present N abundances for 21 bright giants in the globular cluster NGC 6752 based on high-resolution UVES spectra of the 3360A NH lines. We confirm that the Stromgren c1 index traces the N...
Detailed Abundances for 28 Metal-poor Stars: Stellar Relics in the Milky Way (2008)
Lai, David K., Bolte, Michael, Johnson, Jennifer A., Lucatello, Sara, Heger, Alexander, Woosley, S. E.
We present the results of an abundance analysis for a sample of stars with $-4
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...
A High-Resolution Spectrum of the Highly Magnified Bulge G-Dwarf MOA-2006-BLG-099S (2008)
Johnson, Jennifer A., Gaudi, B. Scott, Sumi, Takahiro, Bond, Ian A., Gould, Andrew
We analyze a high-resolution spectrum of a microlensed G-dwarf in the Galactic bulge, acquired when the star was magnified by a factor of 110. We measure a spectroscopic temperature, derived from the...
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...
Nitrogen abundances in giant stars of the globular cluster NGC 6752 (2008)
Yong, David, Grundahl, Frank, Johnson, Jennifer A., Asplund, Martin
The Segue Stellar Parameter Pipeline. II. Validation with galactic globular and open clusters (2008)
Lee, Young Sun, Beers, Timothy C., Sivarani, Thirupathi, Johnson, Jennifer A., An, Deokkeun, Wilhelm, Ronald, ...
We validate the accuracy and precision of the current SEGUE (Sloan Extension for Galactic Understanding and Exploration) Stellar Parameter Pipeline (SSPP), which determines stellar atmospheric...
Allende Prieto, Carlos, Sivarani, Thirupathi, Beers, Timothy C., Lee, Young Sun, Koesterke, Lars, Shetrone, Matthew, ...
We report high-resolution spectroscopy of 125 field stars previously observed as part of the Sloan Digital Sky Survey and its program for Galactic studies, the Sloan Extension for Galactic...
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...
A Search for Binary Stars at Low Metallicity (2007)
Lai, David K., Lucatello, Sara, Bolte, Michael, Fischer, Debra A., Johnson, Jennifer A.
We present initial results measuring the companion fraction of metal-poor stars ([Fe/H]$
Carbon and Strontium Abundances of Metal-Poor Stars (2007)
Lai, David K., Johnson, Jennifer A., Bolte, Michael, Lucatello, Sara
We present carbon and strontium abundances for 100 metal-poor stars measured from R$\sim $7000 spectra obtained with the Echellette Spectrograph and Imager at the Keck Observatory. Using spectral...
A High-Resolution Spectrum of the Extremely Metal-rich Bulge G Dwarf OGLE-2006-BLG-265 (2007)
Johnson, Jennifer A., Gal-Yam, Avishay, Leonard, Douglas C., Simon, Joshua D., Udalski, Andrzej, Gould, Andrew
We present an R = 45,000 Keck spectrum of the microlensed Galactic bulge G dwarf OGLE-2006-BLG-265, which has high (~60) signal-to-noise ratio despite its short (15 minute) exposure time, because the...
A Search for Nitrogen-Enhanced Metal-Poor Stars (2006)
Johnson, Jennifer A., Herwig, Falk, Beers, Timothy C., Christlieb, Norbert
Theoretical models of very metal-poor intermediate-mass Asymptotic Giant Branch (AGB) stars predict a large overabundance of primary nitrogen. The very metal-poor, carbon-enhanced, s-process-rich...
A High-Resolution Spectrum of the Extremely Metal-Rich Bulge G-Dwarf OGLE-2006-BLG-265 (2006)
Johnson, Jennifer A., Gal-Yam, Avishay, Leonard, Douglas C., Simon, Joshua D., Udalski, Andrzej, Gould, Andrew
We present an R=45,000 Keck spectrum of the microlensed Galactic bulge G-dwarf OGLE-2006-BLG-265, which has a high (~60) signal-to-noise ratio despite its short (15 min) exposure time because the...
Chemical Compositions of Red Giant Stars in Old Large Magellanic Cloud Globular Clusters (2005)
Johnson, Jennifer A., Ivans, Inese I., Stetson, Peter B.
We have observed ten red giant stars in four old Large Magellanic Cloud globular clusters with the high-resolution spectrograph MIKE on the Magellan Landon Clay 6.5-m telescope. The stars in our...
Heat shock inhibits NF-kB activation in a dose- and time-dependent manner (2005)
Schell, Michael T, Spitzer, Austin L, Johnson, Jennifer A, Lee, Diana, Harris, Hobart W
Background. The heat shock response (HSR) attenuates NF-kappa B mediated activation of the acute inflammatory response by inhibiting IkB degradation. The HSR also confers a protective phenotype upon...
Johnson, Jennifer A., Zatorre, Robert J.
The cognitive and neural bases of the ability to focus attention on information in one sensory modality while ignoring information in another remain poorly understood. We hypothesized that bimodal...
Johnson, Jennifer A., Zatorre, Robert J.
The cognitive and neural bases of the ability to focus attention on information in one sensory modality while ignoring information in another remain poorly understood. We hypothesized that bimodal...
Johnson, Jennifer A., Zatorre, Robert J.
The cognitive and neural bases of the ability to focus attention on information in one sensory modality while ignoring information in another remain poorly understood. We hypothesized that bimodal...
The s-process in metal-poor stars: Abundances for 22 neutron-capture elements in CS 31062-050 (2004)
Johnson, Jennifer A., Bolte, Michael
The CH star CS 31062-050 ([Fe/H]=-2.42) is one of the most useful stars yet discovered for evaluating the s-process in metal-poor stars. It is very abundant in heavy elements (e.g., [La/Fe]=2.2), and...
Oxygen Abundances in Metal-Poor Stars (2003)
Fulbright, Jon P., Johnson, Jennifer A.
We present oxygen abundances derived from both the permitted and forbidden oxygen lines for 55 subgiants and giants with [Fe/H] values between -2.7 and solar with the goal of understanding the...
The r-process in the early Galaxy (2002)
Johnson, Jennifer A., Bolte, Michael
We report Sr, Pd and Ag abundances for a sample of metal-poor field giants and analyze a larger sample of Y, Zr, and Ba abundances. The [Y/Zr] and [Pd/Ag] abundance ratios are similar to those...
Abundances of 30 elements in 23 metal-poor stars (2001)
We report the abundances of 30 elements in 23 metal-poor ([Fe/H] 0.10 dex, the relative abundances, especially between closely allied atoms such as the rare earth group, often show only small (
Th Ages for Metal-Poor Stars (2001)
Johnson, Jennifer A., Bolte, Michael
With a sample of 22 metal-poor stars, we demonstrate that the heavy element abundance pattern (Z > 55) is the same as the r-process contributions to the solar nebula. This bolsters the results of...
Thesis (M.A.)--University of Northern Colorado, 2000.
"A capstone submitted in partial fulfillment of the requirement for the degree of Master of Arts in Education."
Stetson, Peter B., Bolte, Michael, Harris, William E., Hesser, James E., Bergh, Sidney Van Den, VandenBerg, Don A., ...
We have used the WFPC2 camera on the Hubble Space Telescope to obtain photometry of the outer-halo globular clusters Palomar 3, Palomar 4, and Eridanus. These three are classic examples of the...
Sonchus Yellow Net Rhabdovirus Nuclear Viroplasms Contain Polymerase-Associated Proteins (1998)
Martins, Claudia R. F., Johnson, Jennifer A., Lawrence, Diane M., Choi, Tae-Jin, Pisi, Anna Maria, Tobin, Sara L., ...
We have initiated a study of the cytopathology of nucleorhabdoviruses by analyzing the subcellular localization of sonchus yellow net virus (SYNV) genomic and antigenomic RNAs and the encoded...
Thesis (M.A.)--Texas Woman's University, 1996.
Thesis (Ph. D.)--Michigan State University. Dept. of Chemistry, 1995.
Prepared for: Dept. of Sociology.
Typescript.
Sonchus Yellow Net Rhabdovirus Nuclear Viroplasms Contain Polymerase-Associated Proteins
Martins, Claudia R. F., Johnson, Jennifer A., Lawrence, Diane M., Choi, Tae-Jin, Pisi, Anna-Maria, Tobin, Sara L., ...
We have initiated a study of the cytopathology of nucleorhabdoviruses by analyzing the subcellular localization of sonchus yellow net virus (SYNV) genomic and antigenomic RNAs and the encoded...
Sonchus Yellow Net Rhabdovirus Nuclear Viroplasms Contain Polymerase-Associated Proteins
Martins, Claudia R. F., Johnson, Jennifer A., Lawrence, Diane M., Choi, Tae-Jin, Pisi, Anna-Maria, Tobin, Sara L., ...
We have initiated a study of the cytopathology of nucleorhabdoviruses by analyzing the subcellular localization of sonchus yellow net virus (SYNV) genomic and antigenomic RNAs and the encoded...
Dissociation of Activated Protein C Functions by Elimination of Protein S Cofactor Enhancement*
Harmon, Shona, Preston, Roger J. S., Ainle, Fionnuala Ni, Johnson, Jennifer A., Cunningham, Moya S., Smith, Owen P., ...
Activated protein C (APC) plays a critical anticoagulant role in vivo by inactivating procoagulant factor Va and factor VIIIa and thus down-regulating thrombin generation. In addition, APC bound to...