566 citations · 5.1k across the 47 of their papers we have counts for
47 papers
A Critique of the Spite Plateau, and the Astration of Primordial Lithium
J. E. Norris, D. Yong, A. Frebel +1
We investigate the distribution of the lithium abundances, A(Li), of metal-poor dwarf and subgiant stars within the limits 5500 K < Teff < 6700 K, -6.0 < [Fe/H] < -1.5, and logg >…
Dynamically Tagged Groups of Very Metal-poor Halo Stars from the HK and Hamburg/ESO Surveys
Guilherme Limberg, Silvia Rossi, Timothy C. Beers +13
We analyze the dynamical properties of 1500 very metal-poor (VMP; [Fe/H] ) halo stars, based primarily on medium-resolution spectroscopic data from the HK and…
The Rotation of the halo of NGC 6822 from the radial velocities of carbon stars
Graham P Thompson, Sean G Ryan, Lisette F Sibbons
Using spectra taken with the AAOmega spectrograph, we measure the radial velocities of over 100 stars, many of which are intermediate age carbon stars, in the direction of the dwar…
Elemental abundances and classification of CEMP stars
Dinah M. Allen, Sean G. Ryan, Silvia Rossi +2
We present a detailed study of Carbon-Enhanced Metal-Poor (CEMP) stars, based on high-resolution spectroscopic observations of a sample of 18 stars. The stellar spectra for this sa…
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 barium isotopic mixture for the metal-poor subgiant star HD140283
A. J. Gallagher, S. G. Ryan, A. E. García Pérez +1
Current theory regarding heavy element nucleosynthesis in metal-poor environments states that the r-process would be dominant. The star HD140283 has been the subject of debate afte…