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Boo-1137 - An Extremely Metal-Poor Star in the Ultra-Faint Dwarf Spheroidal Galaxy Boötes I
John E. Norris, David Yong, Gerard Gilmore +1
We present high-resolution, high-S/N spectra of an extremely metal- poor giant star Boo-1137 in the "ultra-faint" dwarf spheroidal galaxy (dSph) Bootes I (absolute magnitude Mv ~ -…
The solar, exoplanet and cosmological lithium problems
J. Melendez, I. Ramirez, L. Casagrande +6
We review three Li problems. First, the Li problem in the Sun, for which some previous studies have argued that it may be Li-poor compared to other Suns. Second, we discuss the Li…
Subaru high-resolution spectroscopy of Star G in the Tycho supernova remnant
W. E. Kerzendorf, B. P. Schmidt, M. Asplund +5
It is widely believed that Type Ia supernovae (SN Ia) originate in binary systems where a white dwarf accretes material from a companion star until its mass approaches the Chandras…
A large C+N+O abundance spread in giant stars of the globular cluster NGC 1851
David Yong, Frank Grundahl, Francesca D'Antona +3
Abundances of C, N, and O are determined in four bright red giants that span the known abundance range for light (Na and Al) and s-process (Zr and La) elements in the globular clus…