Theoretical Estimates of 2-point Shear Correlation Functions Using Tangled Magnetic Field Power Spectrum

Abstract

The existence of primordial magnetic fields can induce matter perturbations with additional power at small scales as compared to the usual $\Lambda$CDM model. We study its implication within the context of two-point shear correlation function from gravitational lensing. We show that primordial magnetic field can leave its imprints on the shear correlation function at angular scales $\lesssim a\; few\; arcmin$. The results are compared with CFHTLS data, which yields 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.

21 pages, 4 figures, Accepted for publication in ApJ

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Cited by in corpus (13)

• Cosmological Magnetic Fields: Their Generation, Evolution and Observation
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• Probing Primordial Magnetic Fields Using Ly-alpha Clouds
• Constraining the primordial magnetic field with dwarf galaxy simulations
• Constraining Primordial Magnetic Fields with Future Cosmic Shear Surveys
• Primordial Density Perturbations from Magnetic Fields
• Dark Matter Minihalos from Primordial Magnetic Fields
• Dwarf galaxies as a probe of a primordially magnetized Universe
• An upper limit on primordial magnetic fields from ultra-faint dwarf galaxies
• The influence of primordial magnetic fields on the spherical collapse model in cosmology
• Cosmological magnetic braking and the formation of high-redshift, super-massive black holes
• Revisiting primordial magnetic fields through 21-cm physics: Bounds and forecasts
• HI absorption from the epoch of reionization and primordial magnetic fields