Lithium abundances in classical and weak T Tauri stars

Bibcode
1992ApJ...392..159M
DOI
10.1086/171414
Magazzu, Antonio; Rebolo, Rafael; Pavlenko, Iakov V.
Bibliographical reference

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 392, no. 1, June 10, 1992, p. 159-171. Research supported by Ministry of Education and Science of Spain.

Advertised on:
6
1992
Journal
Astrophysical Journal
Number of authors
3
IAC number of authors
2
Citations
98
Refereed citations
87
Description
A study on the lithium abundance in 36 T Tauri stars (mass range 0.4-2.25 solar masses), partly based on high-dispersion spectra taken with the Isaac Newton Telescope, is presented. A study of non-LTE effects in the formation of the lithium double in T Tauri stars and derived corrections to the abundances in the LTE in the range 1.0-4.0 log N(Li) is presented. Tor T(eff) of 400-4500 K, a significant upward correction to the LTE abundance (about 0.3-0.6 dex) is found. For T(eff) close to 500 K, smaller corrections (about 0.2 dex), and for log N(Li) greater than about 3, downward corrections (about 0.1 dex) are found. The initial value of the lithium abundance in T Tauri stars is estimated at 3.2 +/- 0.1, which is in close agreement with the accepted present cosmic abundance.
Type
Refereed
Stellar composition
T Tauri stars
Stellar physics

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