Dark Matter Concentration in the Galactic Center

Abstract

It is shown that the matter concentration observed through stellar motion at the Galactic center is consistent with a supermassive object of 2.5 × 10⁶ solar masses composed of self-gravitating, degenerate, heavy neutrinos. This result is opposed to the alternative black hole interpretation. According to the observational data, the lower bounds on possible neutrino masses are m_ν ≥ 12.0 keV/c² for g = 2 or m_ν ≥ 14.3 keV/c² for g = 1, where g is the spin degeneracy factor. The advantage of this scenario is that it could naturally explain the low X-ray and gamma-ray activity of Sgr A*, i.e., the so-called blackness problem of the Galactic center.