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The Properties of Ultraviolet-Luminous Galaxies at the Current Epoch
Timothy M. Heckman, Charles G. Hoopes, Mark Seibert +23
We have used the first matched set of GALEX and SDSS data to investigate the properties of a sample of 74 nearby galaxies with far-ultraviolet luminosities chosen to overlap the lu…
UV Emission from Stellar Populations within Tidal Tails: Catching the Youngest Galaxies in Formation?
S. G. Neff, D. A. Thilker, M. Seibert +22
New GALEX observations have detected significant FUV (1530 Angstroms) and NUV (2310 Angstroms) emission from stellar substructures within the tidal tails of four ongoing galaxy mer…
The UV Galaxy Luminosity Function in the Local Universe from GALEX Data
Ted K. Wyder, Marie A. Treyer, Bruno Milliard +22
We present the results of a determination of the galaxy luminosity function at ultraviolet wavelengths at redshifts of from GALEX data. We determined the luminosity fun…
The On-Orbit Performance of the Galaxy Evolution Explorer
P. Morrissey, D. Schiminovich, T. A. Barlow +35
We report the first year on-orbit performance results for the Galaxy Evolution Explorer (GALEX), a NASA Small Explorer that is performing a survey of the sky in two ultraviolet ban…
The Star Formation Rate Function of the Local Universe
D. Christopher Martin, Mark Seibert, Veronique Buat +22
We have derived the bivariate luminosity function for the far ultraviolet (1530Angstroms) and far infrared (60 microns). We used matched GALEX and IRAS data, and redshifts from NED…
The Galaxy Evolution Explorer: A Space Ultraviolet Survey Mission
D. Christopher Martin, James Fanson, David Schiminovich +21
We give an overview of the Galaxy Evolution Explorer (GALEX), a NASA Explorer Mission launched on April 28, 2003. GALEX is performing the first space UV sky-survey, including imagi…
Abundance Ratios in the Galactic Bulge and Super Metal-Rich Type II Nucle osynthesis
Jon P. Fulbright, R. Michael Rich, Andrew McWilliam
We present abundance results from our Keck/HIRES observations of giants in the Galactic Bulge. We confirm that the metallicity distribution of giants in the low-reddening bulge fie…
High resolution infrared spectra of NGC 6342 and NGC 6528: two moderately reddened Bulge Globular Clusters
L. Origlia, E. Valenti, R. M. Rich
Using the NIRSPEC spectrograph at Keck II, we have obtained infrared echelle spectra covering the range 1.5-1.8 micron for the moderately reddened bulge globular clusters NGC 6342…
The Dearth of Massive, Helium-Rich White Dwarfs in Young Open Star Clusters
Jasonjot Singh Kalirai, Harvey B. Richer, Brad M. S. Hansen +2
Spectra have been obtained of 21 white dwarfs (WDs) in the direction of the young, rich open star cluster NGC 2099. This represents an appreciable fraction (>30%) of the cluster's…
Dynamics and Stellar Content of the Giant Southern Stream in M31. I. Keck Spectroscopy of Red Giant Stars
Puragra Guhathakurta, R. Michael Rich, David B. Reitzel +7
We present results from a large spectroscopic survey of M31 red giants using the Keck telescope/DEIMOS. Photometric pre-screening, based on the 100A-wide DDO51 band centered on the…
The Metal Content of the Bulge Globular Cluster NGC 6528
M. Zoccali, B. Barbuy, V. Hill +7
High resolution spectra of five stars in the bulge globular cluster NGC 6528 were obtained at the 8m VLT UT2-Kueyen telescope with the UVES spectrograph. Out of the five stars, two…
Relative Frequencies of Blue Stragglers in Galactic Globular Clusters: Constraints for the Formation Mechanisms
Giampaolo Piotto, Francesca De Angeli, Ivan R. King +7
We discuss the main properties of the Galactic globular cluster (GC) blue straggler stars (BSS), as inferred from our new catalog containing nearly 3000 BSS. The catalog has been e…
RR Lyrae Stars in the Andromeda Halo from Deep Imaging with the Advanced Camera for Surveys
Thomas M. Brown, Henry C. Ferguson, Ed Smith +4
We present a complete census of RR Lyrae stars in a halo field of the Andromeda galaxy. These deep observations, taken as part of a program to measure the star formation history in…
High resolution infrared spectra of bulge globular clusters: The extreme chemical abundances of Terzan 4 and Terzan 5
Livia Origlia, R. Michael Rich
Using the NIRSPEC spectrograph at Keck II, we have obtained infrared echelle spectra covering the range for the highly reddened bulge globular clusters Terzan 4 an…
HST Observations of the Main Sequence of M4
H. B. Richer, G. G. Fahlman, J. Brewer +8
This paper presents new results from a photometric study of the main-sequence stars in M4, the closest globular cluster to the sun. Multi-field, multi-epoch observations at approxi…