Heavy neutrino ball as a possible solution to the "blackness problem" of the Galactic center

Abstract

It has been recently shown (Tsiklauri & Viollier, 1998a) that the matter concentration inferred from observed 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. It has been furthermore suggested (Tsiklauri & Viollier, 1998a) that the neutrino ball scenario may have an advantage that it could possibly explain the so-called "blackness problem" of the galactic center. Here, we present a quantitative investigation of this statement, by calculating the emitted spectrum of Sgr A${}^{\ast }$ in the framework of standard accretion disk theory.

version 2, MNRAS style, submitted to MNRAS

References in corpus (6)

• Advection-Dominated Accretion Model of Sagittarius A*: Evidence for a Black Hole at the Galactic Center
• Spectrum of Optically Thin Advection Dominated Accretion Flow around a Black Hole: Application to Sgr A*
• Hydrodynamical Accretion Onto Sgr A* From Distributed Point Sources
• Dark matter concentration in the galactic center
• Sgr A^*: A supermassive black hole or a spatially extended object?
• 7 mm lambda VLBA Observations of Sagittarius A*

Cited by in corpus (5)

• A supermassive boson star at the galactic center?
• Accretion disc onto a static non-baryonic compact object
• On the Formation of Degenerate Heavy Neutrino Stars
• The motion of stars near the Galactic center: A comparison of the black hole and fermion ball scenarios
• Fermion stars as gravitational lenses