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The Chemical Inhomogeneity of Faint M13 Stars: C and N Abundances
Michael M. Briley, Judith G. Cohen, Peter B. Stetson
Building upon earlier observations which demonstrate substantial star-to-star differences in the carbon abundances of M13 subgiants, we present new Keck LRIS spectra reaching more…
Pal 12 As A Part of the Sgr Stream; the Evidence From Abundance Ratios
Judith Cohen
We present a detailed abundance analysis for 21 elements based on high dispersion, high spectral resolution Keck spectra for four members of the outer halo ``young'' Galactic globu…
Star Formation and X-ray Emission in Distant Star Forming Galaxies
Judith Cohen
About 45% of the point sources detected in the 2 Ms Chandra exposure of the HDF-N can be matched with moderately bright galaxies with z<1.4 that have been studied by the Caltech Fa…
The Ages and Abundances of a Sample of Globular Clusters in M49 (NGC 4472)
Judith G. Cohen, J. P. Blakeslee, P. Cote
We present a study of the metallicity and age of the globular clusters system of M49 (NGC 4472), the most luminous galaxy in the Virgo cluster. We measure Lick indices for 47 GCs i…
Abundance Analysis of HE2148-1247, A Star With Extremely Enhanced Neutron Capture Elements
Judith G. Cohen, Norbert Christlieb, Y. -Z. Qian +1
Abundances for 27 elements in the very metal poor dwarf star HE2148-1247 are presented, including many of the neutron capture elements. We establish that HE2148-1247 is a very high…