Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...445..124c&link_type=abstract
The Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 445, no. 1, p. 124-132
Astronomy and Astrophysics
Astrophysics
91
Cosmology, Dark Matter, Density Distribution, Galactic Evolution, Galactic Halos, White Dwarf Stars, Brightness Distribution, Mass To Light Ratios, Red Shift, Star Distribution, Star Formation Rate, Stellar Evolution, Stellar Models
Scientific paper
Population synthesis models are combined with constraints from deep galaxy surveys to show that only a small fraction (less than or equal to 10%) of the dark mass in present-day galaxy halos could be in the form of white dwarf remnants of intermediate-mass stars. The bright early phases of halos containing such stars imply that they should be detectable in deep galaxy counts, especially in the near-infrared. Signatures of dark baryonic halos include luminous, low surface brightness galaxies and helium-enriched gas that has either collapsed into cold, dense clouds or else has been ejected into intergalactic space.
Charlot Stephane
Silk Joseph
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