SIMBAD references

2002ApJ...570..820P - Astrophys. J., 570, 820-824 (2002/May-2)

Detailed analysis of nearby bulgelike dwarf stars. II. Lithium abundances.

POMPEIA L., BARBUY B., GRENON M. and CASTILHO B.V.

Abstract (from CDS):

Li abundances are derived for a sample of bulgelike stars with isochronal ages of 10-11 Gyr. These stars have orbits with pericentric distances, Rp, as small as 2-3 kpc and Zmax<1 kpc. The sample comprises G and K dwarf stars in the metallicity range -0.80≤[Fe/H]≤+0.40. Few data on Li abundances in old turnoff stars (≥4.5 Gyr) within the present metallicity range are available. M67 (4.7 Gyr) and NGC 188 (6 Gyr) are the oldest studied metal-rich open clusters with late-type stars. Li abundances have also been studied for a few samples of old metal-rich field stars. In the present work, a high dispersion in Li abundances is found for bulgelike stars with all metallicity ranges, comparable with values in M67. The role of metallicity and age on a Li depletion pattern is discussed. The possible connection between Li depletion and oxygen abundance due to atmospheric opacity effects is investigated.

Abstract Copyright:

Journal keyword(s): Galaxy: Abundances - Stars: Abundances - Stars: Evolution - Stars: Late-Type

Simbad objects: 52

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2020.01.21-22:35:24

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