8.6k citations · 19.4k across the 101 of their papers we have counts for
6 papers · 1 filter
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…
Precise Effective Temperatures of Solar Analog Stars
D. Cornejo, I. Ramirez, P. S. Barklem
We perform a study of 62 solar analog stars to compute their effective temperatures (Teff) using the Balmer line wing fitting procedure and compare them with Teff values obtained u…
Inelastic Mg+H collision data for non-LTE applications in stellar atmospheres
P. S. Barklem, A. K. Belyaev, A. Spielfiedel +2
Rate coefficients for inelastic Mg+H collisions are calculated for all transitions between the lowest seven levels and the ionic state (charge transfer). The rate coefficients are…