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Brown dwarfs as dark galactic halosThe possibility that the dark matter in galactic halos can consist of brown dwarf stars is considered. The radiative signature for such halos consisting solely of brown dwarfs is calculated, and the allowed range of brown dwarf masses, the initial mass function (IMF), the stellar properties, and the density distribution of the galactic halo are discussed. The prediction emission from the halo is compared with existing observations. It is found that, for any IMF of brown dwarfs below the deuterium burning limit, brown dwarf halos are consistent with observations. Brown dwarf halos cannot, however, explain the recently observed near-IR background. It is shown that future satellite missions will either detect brown dwarf halos or place tight constraints on the allowed range of the IMF.
Document ID
19900056902
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Adams, Fred C.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Walker, Terry P.
(Harvard-Smithsonian Center for Astrophysics Cambridge, MA, United States)
Date Acquired
August 14, 2013
Publication Date
August 10, 1990
Publication Information
Publication: Astrophysical Journal, Part 1
Volume: 359
ISSN: 0004-637X
Subject Category
Astrophysics
Accession Number
90A43957
Funding Number(s)
CONTRACT_GRANT: NAG9-31
Distribution Limits
Public
Copyright
Other

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