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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…
Spectroscopy and kinematics of low-mass members of young moving groups
M. C. Galvez-Ortiz, J. R. A. Clarke, D. J. Pinfield +8
We study a target sample of 68 low-mass objects (with spectral types in the range M4.5-L1) previously selected via photometric and astrometric criteria, as possible members of five…
Lithium abundances of halo dwarfs based on excitation temperatures. II. NLTE
A. Hosford, A. E. Garcia Perez, R. Collet +3
One of the most important factors in determining the stellar lithium abundance is the effective temperature. In a previous study by the authors, new effective temperatures Teff for…