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Title: Theoretical estimates of two-point shear correlation functions using tangled magnetic fields
Authors: Pandey, Kanhaiya L.
Sethi, S.K.
Keywords: observations – cosmology
theory – gravitational lensing
weak – magnetic fields Online-only material
color figures
Issue Date: Mar-2012
Publisher: IOP Publishing for the American Astronomical Society
Citation: Astrophysical Journal, 2012, Vol.748, p27
Abstract: The existence of primordial magnetic fields can induce matter perturbations with additional power at small scales as compared to the usual ΛCDM model.We study its implication within the context of a two-point shear correlation function from gravitational lensing. We show that a primordial magnetic field can leave its imprints on the shear correlation function at angular scales a few arcminutes. The results are compared with CFHTLS data, which yield some of the strongest known constraints on the parameters (strength and spectral index) of the primordial magnetic field. We also discuss the possibility of detecting sub-nano Gauss fields using future missions such as SNAP.
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0004-637X
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Copyright: 2012 The American Astronomical Society
Appears in Collections:Research Papers (A&A)

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