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Mean Energy Density of Photogenerated Magnetic Fields Throughout the EoR

Published online by Cambridge University Press:  08 May 2018

Jean-Baptiste Durrive ,
Hiroyuki Tashiro ,
Mathieu Langer  and
Naoshi Sugiyama
Jean-Baptiste Durrive
Affiliation:
Institut d’Astrophysique Spatiale, CNRS, UMR 8617, Univ. Paris-Sud, Université Paris-Saclay, IAS, Bât. 121, 91405, Orsay, France email: jean.baptiste.durrive@e.mbox.nagoya-u.ac.jp Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, Japan
Hiroyuki Tashiro
Affiliation:
Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, Japan
Mathieu Langer
Affiliation:
Institut d’Astrophysique Spatiale, CNRS, UMR 8617, Univ. Paris-Sud, Université Paris-Saclay, IAS, Bât. 121, 91405, Orsay, France email: jean.baptiste.durrive@e.mbox.nagoya-u.ac.jp
Naoshi Sugiyama
Affiliation:
Department of Physics and Astrophysics, Nagoya University, Nagoya 464-8602, Japan Kobayashi-Maskawa Institute for the Origin of Particles and the Universe, Nagoya University, Nagoya 464-8602, Japan Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo, Chiba 277-8582, Japan
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Abstract

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There seems to be magnetic fields at all scales and epochs in our Universe, but their origin at large scales remains an important open question of cosmology. In this work we focus on the generation of magnetic fields in the intergalactic medium due to the photoionizations by the first galaxies, all along the Epoch of Reionization. Based on previous studies which considered only isolated sources, we develop an analytical model to estimate the mean magnetic energy density accumulated in the Universe by this process. In our model, without considering any amplification process, the Universe is globally magnetized by this mechanism to the order of, at least, several 10−18 G during the Epoch of Reionization (i.e. a few 10−20 G comoving).

Keywords

magnetic fieldsmethods: analyticalcosmology: theory
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S333: Peering towards Cosmic Dawn , October 2017 , pp. 60 - 63
Copyright
Copyright © International Astronomical Union 2018 

References

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