1994/10/28 by R. Rébolo, R. Rebolo, Rebolo, R. +6
Physics and Astronomy · #Advanced Frequency and Time Standards #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9410089
10 pp.; 2 figs, available under request; plain TeX (lecproc macro inserted), Invited talk at the ESO Workshop on "The Bottom of the Main sequence - And Beyond", Garching, August 94, proceedings in press., OACatania-94-17
arxiv created 1994/10/28 · openalex publication_date 1994/10/28 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
This paper discusses the ability of Li to confirm the substellar nature of a brown dwarf candidate. Theoretical computations using different interior models agree that brown dwarfs with masses below ∼ 0.065 M\odot preserve a significant fraction of their initial Li content while for higher masses total Li depletion occurs in very short timescales. Refined spectral synthesis using brown dwarf model atmospheres shows that the Li I resonance line at 670.8 nm should produce a conspicuous feature at effective temperatures higher than 2000 K, suitable for spectroscopic detection in present brown dwarf candidates. We summarize the results of our search for Li in many of the best candidates known so far.