Lithium abundance in the atmospheres of the young stars V927 Tau and FN Tau

Details Lithium abundance in the atmospheres of the young stars V927 Tau and FN Tau Lithium abundance in the atmospheres of the young stars V927 Tau and FN Tau

Apr 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001kfnt...17..134p&link_type=abstract

Kinematika i Fizika Nebesnykh Tel, vol. 17, no. 2, p. 134-146

Computer Science

Scientific paper

Results of modeling the spectra of the young stars V927 Tau (M5.5 IV) and FN Tau (M5 IV) are discussed. In the frame work of the LTE approach we computed a grid of synthetical spectra in lambdalambda 768.5-772.5 nm, 668.5-672.5 nm, 810.5-814.5 nm where the resonance line K I lambda 769.9 nm and the resonance and subordinate Li I lines lambdalambda 670.8 and 812.6 nm are located. The effective temperature T_{ef} and gravity log g were determined from the fit of the synthetic spectra to the observed data. We determine T_{ef} = 3100 K for both stars, and log g = 4.0 for V927 Tau and log g = 3.5 for FN Tau. The stars show rotation: v sin i = 13 km/s for FN Tau, 22 km/s V927 Tau. For V927 Tau the determined lithium abundances are log N(Li) = 2.5±0.2 for lambda 670.8 nm and 2.7±0.2 for lambda 812.6 nm. Corresponding abundances for resonance and subordinate lithium lines of FN Tau are log N(Li) = 3.2± 0.4 and 3.3± 0.3.

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