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HE0107-5240, A Chemically Ancient Star.I. A Detailed Abundance Analysis
N. Christlieb, B. Gustafsson, A. J. Korn +5
We report a detailed abundance analysis for HE0107-5240, a halo giant with [Fe/H]_NLTE=-5.3. This star was discovered in the course of follow-up medium-resolution spectroscopy of e…
Inelastic H+Li and H^-+Li^+ collisions and non-LTE Li I line formation in stellar atmospheres
P. S. Barklem, A. K. Belyaev, M. Asplund
Rate coefficients for inelastic collisions between Li and H atoms covering all transitions between the asymptotic states Li(2s,2p,3s,3p,3d,4s,4p,4d,4f)+H(1s) and Li^+ +H^- are pres…
On the collisional depolarization and transfer rates of spectral lines by atomic hydrogen. III: application to -states of neutral atoms
M. Derouich, S. Sahal-Bréchot, P. S. Barklem
The theory of collisional depolarization of spectral lines by atomic hydrogen (Derouich et al. 2003a; Derouich et al. 2003b) is extended to -atomic levels =3). Depolarizatio…
Semi-classical theory of collisional depolarization of spectral lines by atomic hydrogen. I: application to p states of neutral atoms
M. Derouich, S. Sahal-Brechot, P. S. Barklem +1
The present paper extends the method of Anstee, Barklem and O'Mara (Anstee 1992; Anstee & O'Mara 1991, 1995; Anstee, O'Mara & Ross 1997; Barklem 1998; Barklem & O'Mara 1997; Barkle…