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Showing 2012 · astro-ph.GAShow all

5 papers · 2 filters

astro-ph.GA2012★ 217 cited

The Most Metal-Poor Stars. IV. The Two Populations With [Fe/H] < -3.0

John E. Norris, David Yong, M. S. Bessell +8

We discuss the carbon-normal and carbon-rich populations of Galactic halo stars having [Fe/H] < -3.0, utilizing chemical abundances from high-resolution, high-S/N model-atmosphere…

astro-ph.GA2012★ 131 cited

The Most Metal-Poor Stars. III. The Metallicity Distribution Function and CEMP Fraction

David Yong, John E. Norris, M. S. Bessell +6

We examine the metallicity distribution function (MDF) and fraction of carbon-enhanced metal-poor (CEMP) stars in a sample that includes 86 stars with [Fe/H] < -3.0, based on high-…

astro-ph.GA2012★ 344 cited

The Most Metal-Poor Stars. II. Chemical Abundances of 190 Metal-Poor Stars Including 10 New Stars With [Fe/H] < -3.5

David Yong, John E. Norris, M. S. Bessell +6

We present a homogeneous chemical abundance analysis of 16 elements in 190 metal-poor Galactic halo stars (38 program and 152 literature objects). The sample includes 171 stars wit…

astro-ph.GA2012★ 78 cited

The Most Metal-Poor Stars. I. Discovery, Data, and Atmospheric Parameters

John E. Norris, M. S. Bessell, David Yong +7

We report the discovery of 34 stars in the Hamburg/ESO Survey for metal-poor stars and the Sloan Digital Sky Survey that have [Fe/H] < -3.0. Their median and minimum abundances are…

astro-ph.GA2012★ 34 cited

Numerical simulation code for self-gravitating Bose-Einstein condensates

Eniko J. M. Madarassy, Viktor T. Toth

We completed the development of simulation code that is designed to study the behavior of a conjectured dark matter galactic halo that is in the form of a Bose-Einstein Condensate…