H I absorption from the epoch of reionization and primordial magnetic fields

Vasiliev, Evgenii O.; Sethi, S.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5971

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DC Field	Value	Language
dc.contributor.author	Vasiliev, Evgenii O.	-
dc.contributor.author	Sethi, S.K.	-
dc.date.accessioned	2014-09-15T07:49:37Z	-
dc.date.available	2014-09-15T07:49:37Z	-
dc.date.issued	2014-05-10	-
dc.identifier.citation	Astrophysical Journal, 2014, Vol.786, p142	en
dc.identifier.issn	0004-637X	-
dc.identifier.issn	1538-4357-(Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/5971	-
dc.description	Restricted Access. An open-access version is available at arXiv.org (one of the alternative locations)	en
dc.description.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.	en
dc.language.iso	en	en
dc.publisher	IOP Sciences for The American Astronomical Society	en
dc.relation.uri	http://adsabs.harvard.edu/abs/2014ApJ...786..142V	en
dc.relation.uri	http://arxiv.org/abs/1403.5650	en
dc.relation.uri	http://dx.doi.org/10.1088/0004-637X/786/2/142	en
dc.rights	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	en
dc.subject	early universe	en
dc.subject	formation; magnetic fields	en
dc.subject	radio lines: general	en
dc.title	H I absorption from the epoch of reionization and primordial magnetic fields	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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