590 citations · 8.8k across the 153 of their papers we have counts for
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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…
A Second Kelvin-Helmholtz Timescale of Post Helium-Flash Evolution
Andrew Gould
I show that after the "helium flash" abruptly ends its first ascent red giant evolution, a solar-type star is powered primarily by gravitational contraction of its helium core, rat…
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…