Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-10-07
Astronomy and Astrophysics
Astrophysics
4 pages, talk by R.D. Viollier at the 15th Rencontres de Blois, June 2003
Scientific paper
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 degenerate fermions with mass between 76 and 491 keV. Sterile neutrinos of 76 keV mass, which are mixed with at least one of the active neutrinos with a mixing angle ~10^{-7}, are produced in about the right amount in the early Universe and may be responsible for the formation of the supermassive degenerate fermion balls and black holes at the galactic centers.
Bilic Neven
Tupper Gary B.
Viollier Raoul D.
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