Galaxy formation in semi-analytic models with sterile neutrino dark matter

M. R. Lovell, S. Bose, A. Boyarsky, S. Cole, C. Frenk, V. Gonzalez-Perez, R. Kennedy, O. Ruchayskiy, A. Smith

Abstract

The sterile neutrino is a viable dark matter candidate that can be produced in the early Universe with a highly non-thermal spectrum of primordial velocities, and would thus have an effect on the abundance of dwarf galaxies. We use sterile neutrino power spectra as an input for semi-analytic models of galaxy formation in order to predict the number of luminous satellite galaxies in a Milky Way-like halo. By assuming that the mass of the Milky Way halo must be no more than 2 × 1012M (the adopted upper bound based on current astronomical observations) we are able to constrain the value of L6 for Ms ≤ 5 keV. We also show that the range of L6 that is in best agreement with the 3.5 keV line (if produced by decays of 7 keV sterile neutrino) requires that the Milky Way halo has a mass no smaller than 1.2 × 1012M.

OriginalsprogEngelsk
Titel14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings
RedaktørerRemo Ruffini, Massimo Bianchi, Remo Ruffini, Robert T Jantzen
Antal sider6
ForlagWorld Scientific Publishing Co. Pte. Ltd.
Publikationsdato1 jan. 2018
Sider2441-2446
ISBN (Elektronisk)9789813226593
StatusUdgivet - 1 jan. 2018
Begivenhed14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories - Rome, Italien
Varighed: 12 jul. 201518 jul. 2015

Konference

Konference14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories
Land/OmrådeItalien
ByRome
Periode12/07/201518/07/2015
Sponsoret al., International Center for Relativistic Astrophysics Network (ICRANet), International Centre for Theoretical Physics (ICTP), International Union of Pure and Applied Physics (IUPAP), Istituto Nazionale di Fisica Nucleare (INFN), The Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
Navn14th Marcel Grossman Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories, Proceedings

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