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5 papers · 2 filters
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…
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-…
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…
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…
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…