The Origin of Primordial Dwarf Stars and Baryonic Dark Matter

Details The Origin of Primordial Dwarf Stars and Baryonic Dark Matter The Origin of Primordial Dwarf Stars and Baryonic Dark Matter

1999-03-30

arxiv.org/abs/astro-ph/9903465v1

Astronomy and Astrophysics

Astrophysics

TeX, 4 pages plus 2 postscript figures. To appear in Astrophysical Journal Letters

Scientific paper

10.1086/312023

I present a scenario for the production of low mass, degenerate dwarfs of mass $>0.1 M_{\odot}$ via the mechanism of Lenzuni, Chernoff & Salpeter (1992). Such objects meet the mass limit requirements for halo dark matter from microlensing surveys while circumventing the chemical evolution constraints on normal white dwarf stars. I describe methods to observationally constrain this scenario and suggest that such objects may originate in small clusters formed from the thermal instability of shocked, heated gas in dark matter haloes, such as suggested by Fall & Rees (1985) for globular clusters.

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