Boson Stars: Alternatives to primordial black holes?

Details Boson Stars: Alternatives to primordial black holes? Boson Stars: Alternatives to primordial black holes?

2000-01-20

arxiv.org/abs/gr-qc/0001061v1

Nucl.Phys. B564 (2000) 185-203

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

14 pages, uses REVTeX, 1 postscript figure

Scientific paper

10.1016/S0550-3213(99)00492-7

The present surge for the astrophysical relevance of boson stars stems from the speculative possibility that these compact objects could provide a considerable fraction of the non-baryonic part of dark matter within the halo of galaxies. For a very light `universal' axion of effective string models, their total gravitational mass will be in the most likely range of \sim 0.5 M_\odot of MACHOs. According to this framework, gravitational microlensing is indirectly ``weighing" the axion mass, resulting in \sim 10^{-10} eV/c^2. This conclusion is not changing much, if we use a dilaton type self-interaction for the bosons. Moreover, we review their formation, rotation and stability as likely candidates of astrophysical importance.

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