2000/01/01 by Eckehard W. Mielke, Eckehard W Mielke, Franz E. Schunck +1
Physics and Astronomy · #Axion #Boson #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Gravitation #Gravitational microlensing #Gravitational wave #Primordial black hole #Pulsars and Gravitational Waves Research #String (physics) #astro-ph #gr-qc
paper · pdf · doi:10.1016/s0550-3213(99)00492-7
published as Nucl.Phys. B564 (2000) 185-203 · 14 pages, uses REVTeX, 1 postscript figure
openalex publication_date 2000/01/01 · arxiv created 2000/01/20 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
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 ∼ 0.5 M_\odot of MACHOs. According to this framework, gravitational microlensing is indirectly ``weighing" the axion mass, resulting in ∼ 10-10 eV/c2. 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.