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Title: Recombination era magnetic fields from axion dark matter

We introduce a new mechanism for generating magnetic fields in the recombination era. This Harrison-like mechanism utilizes vorticity in baryons that is sourced through the Bose-Einstein condensate of axions via gravitational interactions. The magnetic fields generated are on galactic scales ~10 kpc and have a magnitude of the order of B~10 –23G today. Lastly, the field has a greater magnitude than those generated from other mechanisms relying on second-order perturbation theory, and is sufficient to provide a seed for battery mechanisms.
Authors:
 [1] ;  [2]
  1. Univ. of Florida, Gainesville, FL (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. of Florida, Gainesville, FL (United States)
Publication Date:
Report Number(s):
FERMILAB-PUB-15-570-A-AE-PPD-T; arXiv:1507.03001
Journal ID: ISSN 2470-0010; PRVDAQ; 1382330
Grant/Contract Number:
AC02-07CH11359; FG02-97ER41029
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 93; Journal Issue: 4; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
OSTI Identifier:
1247497
Alternate Identifier(s):
OSTI ID: 1236983

Banik, Nilanjan, and Christopherson, Adam J. Recombination era magnetic fields from axion dark matter. United States: N. p., Web. doi:10.1103/PhysRevD.93.043003.
Banik, Nilanjan, & Christopherson, Adam J. Recombination era magnetic fields from axion dark matter. United States. doi:10.1103/PhysRevD.93.043003.
Banik, Nilanjan, and Christopherson, Adam J. 2016. "Recombination era magnetic fields from axion dark matter". United States. doi:10.1103/PhysRevD.93.043003. https://www.osti.gov/servlets/purl/1247497.
@article{osti_1247497,
title = {Recombination era magnetic fields from axion dark matter},
author = {Banik, Nilanjan and Christopherson, Adam J.},
abstractNote = {We introduce a new mechanism for generating magnetic fields in the recombination era. This Harrison-like mechanism utilizes vorticity in baryons that is sourced through the Bose-Einstein condensate of axions via gravitational interactions. The magnetic fields generated are on galactic scales ~10 kpc and have a magnitude of the order of B~10–23G today. Lastly, the field has a greater magnitude than those generated from other mechanisms relying on second-order perturbation theory, and is sufficient to provide a seed for battery mechanisms.},
doi = {10.1103/PhysRevD.93.043003},
journal = {Physical Review D},
number = 4,
volume = 93,
place = {United States},
year = {2016},
month = {2}
}