590 citations · 8.8k across the 153 of their papers we have counts for
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The Separation Distribution of Ultra-Wide Binaries across Galactic Populations
Hai-Jun Tian, Kareem El-Badry, Hans-Walter Rix +1
We present an extensive sample of ultra-wide binary stars in the solar neighborhood, focusing on separations of . Using data from Gaia DR2, we define kinematic sub-p…
Gaia: Orion's Integral Shaped Filament is a Standing Wave
Amelia M. Stutz, Valentina I. Gonzalez-Lobos, Andrew Gould
The Integral Shaped Filament (ISF) is the nearest molecular cloud with rapid star formation, including massive stars, and it is therefore a star-formation laboratory. We use Gaia p…
Two chemically similar stellar overdensities on opposite sides of the plane of the Galaxy
Maria Bergemann, Branimir Sesar, Judith G. Cohen +9
Our Galaxy is thought to have undergone an active evolutionary history dominated by star formation, the accretion of cold gas, and, in particular, mergers up to 10 gigayear ago. Th…
A New Photometric Model of the Galactic Bar using Red Clump Giants
Liang Cao, Shude Mao, David Nataf +2
We present a study of the luminosity density distribution of the Galactic bar using number counts of red clump giants (RCGs) from the OGLE-III survey. The data were recently publis…
Reddening and Extinction Toward the Galactic Bulge from OGLE-III: The Inner Milky Way's Rv ~ 2.5 Extinction Curve
David M. Nataf, Andrew Gould, Pascal Fouqué +11
We combine VI photometry from OGLE-III with VVV and 2MASS measurements of E(J-K_{s}) to resolve the longstanding problem of the non-standard optical extinction toward the Galactic…
Detached Red Giant Eclipsing Binary Twins: Rosetta Stones to the Galactic Bulge
David M. Nataf, Andrew Gould, Marc H. Pinsonneault
We identify 34 highly-probable detached, red giant eclipsing binary pairs among 315 candidates in Devor's catalog of 10,000 OGLE-II eclipsing binaries. We estimate that there…
Reconciling the Galactic Bulge Turnoff Age Discrepancy with Enhanced Helium Enrichment
David M. Nataf, Andrew P. Gould
We show that the factor 2 discrepancy between spectroscopic and photometric age determinations of the Galactic bulge main-sequence turnoff can be naturally explained by posit…
Red Giant Branch Bump Brightness and Number Counts in 72 Galactic Globular Clusters Observed with the Hubble Space Telescope
David M. Nataf, Andrew P. Gould, Marc H. Pinsonneault +1
We present the broadest and most precise empirical investigation of red giant branch bump (RGBB) brightness and number counts ever conducted. We implement a new method and use data…
The Mass and Radius of the Neutron Star in the Bulge Low-Mass X-ray Binary KS 1731-260
Feryal Ozel, Andrew Gould, Tolga Guver
Measurements of neutron star masses and radii are instrumental for determining the equation of state of their interiors, understanding the dividing line between neutron stars and b…
SEGUE-2 Limits on Metal-Rich Old-Population Hypervelocity Stars In the Galactic Halo
Juna A. Kollmeier, Andrew Gould, Constance Rockosi +7
We present new limits on the ejection of metal-rich old-population hypervelocity stars from the Galactic center (GC) as probed by the SEGUE-2 survey. Our limits are a factor of 3-1…
The Split Red Clump of the Galactic Bulge from OGLE-III
D. M. Nataf, A. Udalski, A. Gould +2
The red clump is found to be split into two components along several sightlines toward the Galactic Bulge. This split is detected with high significance toward the areas (-3.5<l<1,…
A Puzzle Involving Galactic Bulge Microlensing Events
Judith G. Cohen, Andrew Gould, Ian B. Thompson +7
We study a sample of 16 microlensed Galactic bulge main sequence turnoff region stars for which high dispersion spectra have been obtained with detailed abundance analyses. We demo…
The Effect of Differential Limb Magnification on Abundance Analysis of Microlensed Dwarf Stars
Jennifer A. Johnson, Subo Dong, Andrew Gould
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 highl…
Spectroscopic Confirmation of the Pisces Overdensity
Juna A. Kollmeier, Andrew Gould, Stephen Shectman +6
We present spectroscopic confirmation of the "Pisces Overdensity", also known as "Structure J", a photometric overdensity of RR Lyrae stars discovered by the Sloan Digital Sky Surv…
The EROS2 search for microlensing events towards the spiral arms: the complete seven season results
Y. R. Rahal, C. Afonso, J. -N. Albert +36
The EROS-2 project has been designed to search for microlensing events towards any dense stellar field. The densest parts of the Galactic spiral arms have been monitored to maximiz…