Magnification bias as a novel probe for primordial magnetic fields

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In this paper we investigate magnetic fields generated in the early Universe.

• These fields are important candidates at explaining the origin of astrophysical magnetism observed in galaxies and galaxy clusters, whose genesis is still by and large unclear.
• Compared to the standard inflationary power spectrum, intermediate to small scales would experience further substantial matter clustering, were a cosmological magnetic field present prior to recombination.
• As a consequence, the bias and redshift distribution of galaxies would also be modified.