Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pasj...57...45t&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.57, No.1, pp. 45-63
Astronomy and Astrophysics
Astronomy
31
Line: Formation, Stars: Abundances, Stars: Atmospheres, Stars: Late-Type, Sun: Abundances
Scientific paper
An extensive profile-fitting analysis was performed for the Li(+Fe) 6707-6708Å feature of nearby 160 F-K dwarfs/subgiants (including 27 planet-host stars) in the Galactic disk ( 7000 K ≳ Teff ≳ 5000 K, -1 ≲ [Fe/H] ≲ +0.4), in order to establish the photospheric lithium abundances of these stars. The non-LTE effect (though quantitatively insignificant) was taken into account based on our statistical equilibrium calculations, which were carried out on an adequate grid of models. Our results confirmed most of the interesting observational characteristics revealed by recently published studies, such as the bimodal distribution of the Li abundances for stars at Teff ≳ 6000 K, the satisfactory agreement of the upper envelope of the A(Li) vs. [Fe/H] distribution with the theoretical models, the existence of a positive correlation between A(Li) and the stellar mass, and the tendency of lower lithium abundances of planet-host stars (as compared to stars without planets) at the narrow ``transition'' region of 5900 K ≳ Teff ≳ 5800 K. The solar Li abundance derived from this analysis is 0.92 (H = 12.00), which is by 0.24dex lower than the widely referenced standard value of 1.16.
Kawanomoto Satoshi
Takeda Yoichi
No associations
LandOfFree
Lithium Abundances of F-, G-, and K-Type Stars: Profile-Fitting Analysis of the Li I 6708 Doublet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Lithium Abundances of F-, G-, and K-Type Stars: Profile-Fitting Analysis of the Li I 6708 Doublet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium Abundances of F-, G-, and K-Type Stars: Profile-Fitting Analysis of the Li I 6708 Doublet will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-823620