Probing primordial magnetic fields using lyα clouds

Pandey, Kanhaiya L.; Sethi, S.K.

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/5373

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DC Field	Value	Language
dc.contributor.author	Pandey, Kanhaiya L.	-
dc.contributor.author	Sethi, S.K.	-
dc.date.accessioned	2013-01-21T11:08:53Z	-
dc.date.available	2013-01-21T11:08:53Z	-
dc.date.issued	2013-01	-
dc.identifier.citation	The Astrophysical journal, 2013, Vol.762, p15	en
dc.identifier.issn	0004-637X	-
dc.identifier.issn	1538-4357-(Online)	-
dc.identifier.uri	http://hdl.handle.net/2289/5373	-
dc.description	Restricted Access. An open-access version is available at arXiv.org. Articles older than 2 years are open to all at the journal site	en
dc.description.abstract	From previous studies of the effect of primordial magnetic fields on early structure formation, we know that the presence of primordial magnetic fields during early structure formation could induce more perturbations at small scales (at present 1-10 h –1 Mpc) as compared to the usual ΛCDM theory. Matter power spectra over these scales are effectively probed by cosmological observables such as shear correlation and Lyα clouds. In this paper we discuss the implications of primordial magnetic fields on the distribution of Lyα clouds. We simulate the line-of-sight density fluctuation including the contribution coming from the primordial magnetic fields. We compute the evolution of Lyα opacity for this case and compare our theoretical estimates of Lyα opacity with the existing data to constrain the parameters of the primordial magnetic fields. We also discuss the case when the two density fields are correlated. Our analysis yields an upper bound of roughly 0.3-0.6 nG on the magnetic field strength for a range of nearly scale-invariant models, corresponding to a magnetic field power spectrum index n –3.	en
dc.language.iso	en	en
dc.publisher	IOP Sciences for The American Astronomical Society.	en
dc.relation.uri	http://dx.doi.org/10.1088/0004-637X/762/1/15	en
dc.relation.uri	http://arxiv.org/abs/1210.3298	en
dc.rights	2013 American Astronomical Society	en
dc.subject	intergalactic medium	en
dc.subject	opacity	en
dc.title	Probing primordial magnetic fields using lyα clouds	en
dc.type	Article	en
Appears in Collections:	Research Papers (A&A)

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