The primordial magnetic field in our cosmic backyard
S. Hutschenreuter, S. Dorn, J. Jasche, F. Vazza, D. Paoletti, G. Lavaux, and T. Enßlin. (2018)cite arxiv:1803.02629Comment: 14 pages, 19 figures. Revised version after peer review. Scientific and computational results are unchanged. This is an author-created, un-copyedited version of an article published in Classical and Quantum Gravity. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence.
DOI: 10.1088/1361-6382/aacde0
Abstract
We reconstruct the 3D structure of magnetic fields, which were seeded by
density perturbations during the radiation dominated epoch of the Universe and
later on were evolved by structure formation. To achieve this goal, we rely on
three dimensional initial density fields inferred from the 2M++ galaxy
compilation via the Bayesian $BORG$ algorithm. Using those, we
estimate the magnetogenesis by the so called Harrison mechanism. This effect
produced magnetic fields exploiting the different photon drag on electrons and
ions in vortical motions, which are exited due to second order perturbation
effects in the Early Universe. Subsequently we study the evolution of these
seed fields through the non-linear cosmic structure formation by virtue of a
MHD simulation to obtain a 3D estimate for the structure of this primordial
magnetic field component today. At recombination we obtain a reliable lower
limit on the large scale magnetic field strength around $10^-23 G$,
with a power spectrum peaking at about $ 2\, Mpc^-1h$ in comoving
scales. At present we expect this evolved primordial field to have strengthts
above $10^-27\, G$ and $10^-29\, G$ in
clusters of galaxies and voids, respectively. We also calculate the
corresponding Faraday rotation measure map and show the magnetic field
morphology and strength for specific objects of the Local Universe.
Description
The primordial magnetic field in our cosmic backyard
cite arxiv:1803.02629Comment: 14 pages, 19 figures. Revised version after peer review. Scientific and computational results are unchanged. This is an author-created, un-copyedited version of an article published in Classical and Quantum Gravity. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence
%0 Generic
%1 hutschenreuter2018primordial
%A Hutschenreuter, Sebastian
%A Dorn, Sebastian
%A Jasche, Jens
%A Vazza, Franco
%A Paoletti, Daniela
%A Lavaux, Guilhem
%A Enßlin, Torsten A.
%D 2018
%K bayesian_analysis cosmology hep-ph lss magnetic_fields
%R 10.1088/1361-6382/aacde0
%T The primordial magnetic field in our cosmic backyard
%U http://arxiv.org/abs/1803.02629
%X We reconstruct the 3D structure of magnetic fields, which were seeded by
density perturbations during the radiation dominated epoch of the Universe and
later on were evolved by structure formation. To achieve this goal, we rely on
three dimensional initial density fields inferred from the 2M++ galaxy
compilation via the Bayesian $BORG$ algorithm. Using those, we
estimate the magnetogenesis by the so called Harrison mechanism. This effect
produced magnetic fields exploiting the different photon drag on electrons and
ions in vortical motions, which are exited due to second order perturbation
effects in the Early Universe. Subsequently we study the evolution of these
seed fields through the non-linear cosmic structure formation by virtue of a
MHD simulation to obtain a 3D estimate for the structure of this primordial
magnetic field component today. At recombination we obtain a reliable lower
limit on the large scale magnetic field strength around $10^-23 G$,
with a power spectrum peaking at about $ 2\, Mpc^-1h$ in comoving
scales. At present we expect this evolved primordial field to have strengthts
above $10^-27\, G$ and $10^-29\, G$ in
clusters of galaxies and voids, respectively. We also calculate the
corresponding Faraday rotation measure map and show the magnetic field
morphology and strength for specific objects of the Local Universe.
@misc{hutschenreuter2018primordial,
abstract = {We reconstruct the 3D structure of magnetic fields, which were seeded by
density perturbations during the radiation dominated epoch of the Universe and
later on were evolved by structure formation. To achieve this goal, we rely on
three dimensional initial density fields inferred from the 2M++ galaxy
compilation via the Bayesian $\texttt{BORG}$ algorithm. Using those, we
estimate the magnetogenesis by the so called Harrison mechanism. This effect
produced magnetic fields exploiting the different photon drag on electrons and
ions in vortical motions, which are exited due to second order perturbation
effects in the Early Universe. Subsequently we study the evolution of these
seed fields through the non-linear cosmic structure formation by virtue of a
MHD simulation to obtain a 3D estimate for the structure of this primordial
magnetic field component today. At recombination we obtain a reliable lower
limit on the large scale magnetic field strength around $10^{-23} \mathrm{G}$,
with a power spectrum peaking at about $ 2\, \mathrm{Mpc}^{-1}h$ in comoving
scales. At present we expect this evolved primordial field to have strengthts
above $\approx 10^{-27}\, \mathrm{G}$ and $\approx 10^{-29}\, \mathrm{G}$ in
clusters of galaxies and voids, respectively. We also calculate the
corresponding Faraday rotation measure map and show the magnetic field
morphology and strength for specific objects of the Local Universe.},
added-at = {2023-02-05T21:29:22.000+0100},
author = {Hutschenreuter, Sebastian and Dorn, Sebastian and Jasche, Jens and Vazza, Franco and Paoletti, Daniela and Lavaux, Guilhem and Enßlin, Torsten A.},
biburl = {https://www.bibsonomy.org/bibtex/2b32e7495e0402a7da21478c2ef049844/intfxdx},
description = {The primordial magnetic field in our cosmic backyard},
doi = {10.1088/1361-6382/aacde0},
interhash = {2cbdd50bc803d1778b6e3f7abdd1e328},
intrahash = {b32e7495e0402a7da21478c2ef049844},
keywords = {bayesian_analysis cosmology hep-ph lss magnetic_fields},
note = {cite arxiv:1803.02629Comment: 14 pages, 19 figures. Revised version after peer review. Scientific and computational results are unchanged. This is an author-created, un-copyedited version of an article published in Classical and Quantum Gravity. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. This article is published under a CC BY licence},
timestamp = {2023-02-05T21:29:22.000+0100},
title = {The primordial magnetic field in our cosmic backyard},
url = {http://arxiv.org/abs/1803.02629},
year = 2018
}