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Please use this identifier to cite or link to this item: http://hdl.handle.net/123456789/251

Title: Astrophysical constraints on primordial black holes in Brans-Dicke theory
Authors: Nayak, B
Majumdar, A S
Singh, L P
Keywords: primordial black holes
modified gravity
Issue Date: 2010
Publisher: J. Cosmol. Astropart. Phys.
Citation: B. Nayak, A. S. Majumdar and L. P. Singh, Astrophysical constraints on primordial black holes in Brans-Dicke theory, J. Cosmol. Astropart. Phys., 2010, 08, 039
Abstract: We consider cosmological evolution in Brans-Dicke theory with a population of primordial black holes. Hawking radiation from the primordial black holes impacts various astrophysical processes during the evolution of the Universe. The accretion of radiation by the black holes in the radiation dominated era may be effective in imparting them a longer lifetime. We present a detailed study of how this affects various standard astrophysical constraints coming from the evaporation of primordial black holes. We analyze constraints arising from the present density of the Universe, the present photon spectrum, the distortion of the cosmic microwave background spectrum and also from processes affecting light element abundances after nucleosynthesis. We find that the constraints on the initial primordial black hole mass fractions are tightened with increased accretion efficiency.
URI: http://hdl.handle.net/123456789/251
Appears in Collections:2010

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