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The ACS Survey of Galactic Globular Clusters. VII. Relative Ages
Antonio Marin-Franch, Antonio Aparicio, Giampaolo Piotto +13
The ACS Survey of Galactic Globular Clusters is a Hubble Space Telescope (HST) Treasury program designed to provide a new large, deep and homogeneous photometric database. Based on…
Metallicity Analysis of MACHO Galactic Bulge RR0 Lyrae stars from their Lightcurves
Andrea Kunder, Brian Chaboyer
We present metallicities of 2690 RR0 Lyrae stars observed toward the MACHO Survey fields in the Galactic Bulge. These [Fe/H] values are based upon an empirically calibrated relatio…
The Dartmouth Stellar Evolution Database
Aaron Dotter, Brian Chaboyer, Darko Jevremovic +3
The ever-expanding depth and quality of photometric and spectroscopic observations of stellar populations increase the need for theoretical models in regions of age-composition par…
An ACS Survey of Globular Clusters V: Star Catalog for Each Cluster
Jay Anderson, Ata Sarajedini, Luigi R. Bedin +10
The ACS Survey of Globular Clusters has used HST's Wide-Field Channel to obtain uniform imaging of 65 of the nearest globular clusters to provide an extensive homogeneous dataset f…
Discovery of a Jupiter/Saturn Analog with Gravitational Microlensing
B. S. Gaudi, D. P. Bennett, A. Udalski +66
Searches for extrasolar planets have uncovered an astonishing diversity of planetary systems, yet the frequency of solar system analogs remains unknown. The gravitational microlens…
The Extinction Toward the Galactic Bulge from RR Lyrae Stars
Andrea Kunder, Piotr Popowski, Kem H. Cook +1
We present mean reddenings toward 3525 RR0 Lyrae stars from the Galactic bulge fields of the MACHO Survey. These reddenings are determined using the color at minimum -band light…