NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
an expanded set of brown dwarf and very low mass star modelsWe present in this paper updated and improved theoretical models of brown dwarfs and late M dwarfs. The evolution and characteristics of objects between 0.01 and 0.2 solar mass are exhaustively investigated and special emphasis is placed on their properties at early ages. The dependence on the helium fraction, deuterium fraction, and metallicity of the masses, effective temperature and luminosities at the edge of the hydrogen main sequence are calculated. We derive luminosity functions for representative mass functions and compare our predictions to recent cluster data. We show that there are distinctive features in the theoretical luminosity functions that can serve as diagnostics of brown dwarf physics. A zero-metallicity model is presented as a bound to or approximation of a putative extreme halo population.
Document ID
19930046544
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Burrows, A.
(NASA Headquarters Washington, DC United States)
Hubbard, W. B.
(NASA Headquarters Washington, DC United States)
Saumon, D.
(NASA Headquarters Washington, DC United States)
Lunine, J. I.
(Arizona Univ. Tucson, United States)
Date Acquired
August 16, 2013
Publication Date
March 20, 1993
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 406
Issue: 1
ISSN: 0004-637X
Subject Category
ASTROPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF AST-89-10780
CONTRACT_GRANT: NAGW-2145
CONTRACT_GRANT: NSF AST-89-14346
Distribution Limits
Public
Copyright
Other