Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5971
Title: H I absorption from the epoch of reionization and primordial magnetic fields
Authors: Vasiliev, Evgenii O.
Sethi, S.K.
Keywords: early universe
formation; magnetic fields
radio lines: general
Issue Date: 10-May-2014
Publisher: IOP Sciences for The American Astronomical Society
Citation: Astrophysical Journal, 2014, Vol.786, p142
Abstract: We study the impact of primordial magnetic fields on the H I absorption from the epoch of reionization. The presence of these fields results in two distinct effects: (1) the heating of the halos from the decay of the magnetic fields owing to ambipolar diffusion, and (2) an increase in the number of halos owing to additional matter fluctuations induced by magnetic fields. We analyze both of these effects and show that the latter is potentially observable because the number of halos along of line of sight can increase by many orders of magnitude. While this effect is not strongly dependent on the magnetic field strength in the range 0.3-0.6 nG, it is extremely sensitive to the magnetic field power spectral index for the near scale-free models. Therefore, the detection of such absorption features could be a sensitive probe of the primordial magnetic field and its power spectrum. We discuss the detectability of these features with the ongoing and future radio interferometers. In particular, we show that LOFAR might be able to detect these absorption features at z sime 10 in less than 10 hr of integration if the flux of the background source is 400 mJy.
Description: Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)
URI: http://hdl.handle.net/2289/5971
ISSN: 0004-637X
1538-4357-(Online)
Alternative Location: http://adsabs.harvard.edu/abs/2014ApJ...786..142V
http://arxiv.org/abs/1403.5650
http://dx.doi.org/10.1088/0004-637X/786/2/142
Copyright: 2014 American Astronomical Society, This article may be downloaded for personal use only. Any other use requires prior permission of the author and The American Astronomical Society
Appears in Collections:Research Papers (A&A)

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