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Title: Astrophysical constraints on primordial black holes in Brans-Dicke theory

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.

Authors:
;  [1]
  1. Department of Physics, Utkal University, Vanivihar, Bhubaneswar 751004 (India)
Publication Date:
OSTI Identifier:
22272834
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2010; Journal Issue: 08; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ASTROPHYSICS; BLACK HOLES; BRANES; COSMOLOGY; ELEMENT ABUNDANCE; LIFETIME; LIMITING VALUES; MASS; NUCLEOSYNTHESIS; PHOTONS; RELICT RADIATION; UNIVERSE; VISIBLE RADIATION

Citation Formats

Nayak, B., Singh, L. P., and Majumdar, A.S., E-mail: bibeka@iopb.res.in, E-mail: archan@bose.res.in, E-mail: lambodar_uu@yahoo.co.in. Astrophysical constraints on primordial black holes in Brans-Dicke theory. United States: N. p., 2010. Web. doi:10.1088/1475-7516/2010/08/039.
Nayak, B., Singh, L. P., & Majumdar, A.S., E-mail: bibeka@iopb.res.in, E-mail: archan@bose.res.in, E-mail: lambodar_uu@yahoo.co.in. Astrophysical constraints on primordial black holes in Brans-Dicke theory. United States. https://doi.org/10.1088/1475-7516/2010/08/039
Nayak, B., Singh, L. P., and Majumdar, A.S., E-mail: bibeka@iopb.res.in, E-mail: archan@bose.res.in, E-mail: lambodar_uu@yahoo.co.in. 2010. "Astrophysical constraints on primordial black holes in Brans-Dicke theory". United States. https://doi.org/10.1088/1475-7516/2010/08/039.
@article{osti_22272834,
title = {Astrophysical constraints on primordial black holes in Brans-Dicke theory},
author = {Nayak, B. and Singh, L. P. and Majumdar, A.S., E-mail: bibeka@iopb.res.in, E-mail: archan@bose.res.in, E-mail: lambodar_uu@yahoo.co.in},
abstractNote = {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.},
doi = {10.1088/1475-7516/2010/08/039},
url = {https://www.osti.gov/biblio/22272834}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 08,
volume = 2010,
place = {United States},
year = {Sun Aug 01 00:00:00 EDT 2010},
month = {Sun Aug 01 00:00:00 EDT 2010}
}