SIGNATURES OF WHITE-DWARF GALAXY HALOS

被引:79
作者
CHARLOT, S
SILK, J
机构
[1] UNIV CALIF BERKELEY,CTR PARTICLE ASTROPHYS,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720
关键词
COSMOLOGY; THEORY; DARK MATTER; GALAXIES; EVOLUTION; GALAXY; HALO; WHITE DWARFS;
D O I
10.1086/175677
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Population synthesis models are combined with constraints from deep galaxy surveys to show that only a small fraction (less than or similar 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.
引用
收藏
页码:124 / 132
页数:9
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