Dark matter concentration in the galactic center

Details Dark matter concentration in the galactic center Dark matter concentration in the galactic center

1998-05-20

arxiv.org/abs/astro-ph/9805273v2

Astrophys.J. 500 (1998) 591

Astronomy and Astrophysics

Astrophysics

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

Scientific paper

10.1086/305753

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 $m_\nu \geq 12.0$ keV$/c^2$ for $g=2$ or $m_\nu \geq 14.3$ 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$^*$, i.e. the so called "blackness problem" of the galactic center.

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