Other
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...377..657d&link_type=abstract
Astrophysical Journal (ISSN 0004-637X), vol. 377, Aug. 20, 1991, p. 657-668. Research supported by Robert A. Welch Foundation.
Other
45
Carbon Stars, Lithium, Stellar Composition, Stellar Spectra, Stellar Temperature, Abundance, Asymptotic Giant Branch Stars, Stellar Envelopes, Stellar Interiors
Scientific paper
High-dispersion, high SNR ratio spectra near 6707 A have provided Li abundances for 29 cool carbon stars. For the carbon stars, with the exception of the J star WZ Cas, the Li abundance ranges from log epsilon(Li) = -0.6 to -1.7 and is uncorrelated with the C-12/C-13, C/O and other abundance ratios, and the effective temperature. The Li abundances are on average lower than found for M giants. This difference may be due to a systematic underestimate of the carbon stars' effective temperatures by 200-400 K. It is possible that Li may be destroyed at the base of an asymptotic giant branch star's convective envelope. When the base temperature increases substantially, Li may be produced by the B-7 transport mechanism, as in the super Li-rich SC (J-type) star WZ Cas with log epsilon(Li) = 6.5.
Denn Grant Russell
Lambert David L.
Luck Earle R.
No associations
LandOfFree
Lithium abundances in carbon stars 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 in carbon stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lithium abundances in carbon stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1725578