Open AccessAnnihilation radiation from a dark matter spike at the Galactic Centre
Author(s) -
Bertone Gianfranco,
Sigl Günter,
Silk Joseph
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05892.x
Subject(s) - physics , astrophysics , dark matter , equipartition theorem , annihilation , astronomy , black hole (networking) , adiabatic process , accretion (finance) , magnetic field , particle physics , quantum mechanics , computer network , routing protocol , routing (electronic design automation) , computer science , link state routing protocol
We study annihilation radiation of neutralinos in the Galactic Centre, assuming the existence of a ‘spike’ in the dark matter density profile, caused by adiabatic accretion on to the massive black hole lying at the Galactic Centre. Under this assumption we find that it is possible to reproduce the observed SgrA* emission at radio and gamma‐ray frequencies in a consistent scenario with a magnetic field close to the equipartition strength and with values of γ (the density profile power‐law index) around 0.1.