Dark matter concentration in the galactic center

Abstract

It is shown that the matter concentration observed through stellar motion at the galactic center (Eckart & Genzel, 1997, MNRAS, 284, 576 and Genzel et al., 1996, ApJ, 472, 153) is consistent with a supermassive object of $2.5\times 10^6$ solar masses composed of self-gravitating, degenerate heavy neutrinos, as an alternative to the black hole interpretation. According to the observational data, the lower bounds on possible neutrino masses are $m_{\nu }\ge 12.0$ keV$/c^2$ for $g=2$ or $m_{\nu }\ge 14.3$ keV$/c^2$ 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${}^{\ast }$, i.e. the so called "blackness problem" of the galactic center.

ApJ, 500, 591 (1998), AASTEX, aasms4.sty, v2 reference added

References in corpus (2)

• Hydrodynamical Accretion Onto Sgr A* From Distributed Point Sources
• Gamma-ray Emission From Advection-Dominated Accretion Flows Around Black Holes: Application to the Galactic Center

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