Dark Matter at the Center and in the Halo of the Galaxy
| dc.creator | Bilic, Neven | |
| dc.creator | Tupper, Gary B. | |
| dc.creator | Viollier, Raoul D. | |
| dc.date | 2003-10-10 | |
| dc.date.accessioned | 2026-07-07T02:10:19Z | |
| dc.date.available | 2026-07-07T02:10:19Z | |
| dc.description | All presently known stellar-dynamical constraints on the size and mass of the supermassive compact dark object at the Galactic center are consistent with a ball of self-gravitating, nearly non-interacting, degenerate fermions with mass between 76 and 491 keV, for degeneracy factor g=2. Sterile neutrinos of 76 keV mass, which are mixed with at least one of the active neutrinos with a mixing angele ~10^{-7}, are produced in about the right amount in the early Universe by incoherent resonant and non-resonant scattering of active neutrinos having asymmetry of ~0.01. The former process yields sterile neutrinos with a quasi-degenerate spectrum while the latter leads to a thermal spectrum. As the production mechanism of the sterile neutrino is consistent with the constraints from large scale structure formation, core collapse supernovae, and diffuse X-ray background, it could be the dark matter particle of the Universe. | |
| dc.description | 6 pages, to appear in the Beyond 2003 conference proceedings | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310294 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310294 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6700 | |
| dc.subject | Astrophysics | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Dark Matter at the Center and in the Halo of the Galaxy | |
| dc.type | text |