Other
Scientific paper
Jul 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..758l&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 758-762.
Other
24
H Alpha Line, Radial Velocity, Stellar Motions, Stellar Spectrophotometry, Stellar Temperature, Brown Dwarf Stars, Charge Coupled Devices, Dwarf Stars, High Resolution, Late Stars, Main Sequence Stars, Peculiar Stars, Radiation Detectors
Scientific paper
Improved spectrophotometric scans are presented for this very faint, red, large-proper motion star which has a peculiar spectrum. The Palomar Observatory 5 meter CCD spectrum shows the clear presence of VO λ7400 and λ7900. However, the TiO and hydride bands and the Na I and K I lines appear relatively weaker over the spectrum of LHS 2924 than they do in the benchmark low-luminosity star VB 10. A high-resolution observation with the MMT echelle spectrograph shows very weak Hα emission, at best. These and other recent results eliminate all previously considered explanations of the nature of LHS 2924 other than a very cool, main-sequence star or sub-stellar-mass "brown dwarf." The weakness of Hα emission tends to indicate that the star is an old, main-sequence object.
Boroson Todd A.
Giampapa Mark S.
Liebert James
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