2001A&A...376..853D


C.D.S. - SIMBAD4 rel 1.7 - 2021.02.26CET18:37:11

2001A&A...376..853D - Astronomy and Astrophysics, volume 376, 853-860 (2001/9-4)

Astrophysical constraints on a possible neutrino ball at the Galactic Center.

DE PAOLIS F., INGROSSO G., NUCITA A.A., ORLANDO D., CAPOZZIELLO S. and IOVANE G.

Abstract (from CDS):

The nature of the massive object at the Galactic Center (Sgr A*) is still unclear even if various observational campaigns led many authors to believe that our Galaxy hosts a super-massive black hole with mass M≃2.6x106M. However, the black hole hypothesis, which theoretically implies a luminosity ≃1041erg/s, runs into problems if one takes into account that the observed luminosity, from radio to γ-ray wavelengths, is below 1037erg/s. In order to solve this blackness problem, alternative models have recently been proposed. In particular, it has been suggested that the Galactic Center hosts a ball made up of non-baryonic matter (e.g. massive neutrinos and anti-neutrinos) in which the degeneracy pressure of fermions balances their self-gravity. Requiring it to be consistent with all the available observations towards the Galactic Center allows us to put severe astrophysical constraints on the neutrino ball parameters. The presence of such an object in the Galactic Center may be excluded if the constituent neutrino mass mν is >24keV, while if mν≲24keV observations cannot give a definite answer.

Abstract Copyright:

Journal keyword(s): elementary particles - gravitation - Galaxy Center

Simbad objects: 2

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Number of rows : 2

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 920 0
2 NAME Gal Center reg 17 45 40.04 -29 00 28.1           ~ 11996 0

    Equat.    Gal    SGal    Ecl

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