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

Authors
Journal
Astroparticle Physics
0927-6505
Publisher
Elsevier
Publication Date
Volume
12
Issue
3
Identifiers
DOI: 10.1016/s0927-6505(99)00083-3
Keywords
  • Accretion
  • Accretion Disks
  • Dark Matter
  • Galaxy: Center
  • Radiation Mechanisms: Thermal
Disciplines
  • Physics

Abstract

Abstract It has been recently shown (Tsiklauri and Viollier, 1998, ApJ 500, 591) that the matter concentration inferred from observed stellar motion at the galactic center (Eckart and Genzel 1997, MNRAS 284, 576 and Genzel et al. 1996, ApJ 472, 153) is consistent with a supermassive object of 2.5 × 10 6 solar masses, composed of self-gravitating, degenerate heavy neutrinos. It has been furthermore suggested (Tsiklauri and Viollier, 1998, ApJ 500, 591) 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 ∗ in the framework of standard accretion disk theory.

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