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General Relativity and Quantum Cosmology

Title:Boson Stars: Alternatives to primordial black holes?

Abstract: 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.
Comments: 14 pages, uses REVTeX, 1 postscript figure
Journal reference: Nucl.Phys. B564 (2000) 185-203
DOI: 10.1016/S0550-3213(99)00492-7
Cite as: arXiv:gr-qc/0001061
  (or arXiv:gr-qc/0001061v1 for this version)

Submission history

From: Franz Schunck [view email]
[v1] Thu, 20 Jan 2000 23:19:32 UTC (37 KB)