Constraining Primordial Magnetic Fields through Large-scale Structure

Kahniashvili, Tina and Maravin, Yurii and Natarajan, Aravind and Battaglia, Nick and Tevzadze, Alexander (2013) Constraining Primordial Magnetic Fields through Large-scale Structure. Astrophysical Journal, 770. pp. 47-54.


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We study primordial magnetic field effects on the matter perturbations in the universe. We assume magnetic field generation prior to the big bang nucleosynthesis (BBN), i.e., during the radiation-dominated epoch of the universe expansion, but do not limit analysis by considering a particular magnetogenesis scenario. Contrary to previous studies, we limit the total magnetic field energy density and not the smoothed amplitude of the magnetic field at large (of the order of 1 Mpc) scales. We review several cosmological signatures, such as halo abundance, thermal Sunyaev-Zel'dovich effect, and Lyα data. For a cross-check, we compare our limits with that obtained through the cosmic microwave background faraday rotation effect and BBN. The limits range between 1.5 nG and 4.5 nG for nB in (- 3; -1.5).

Item Type: Article
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Depositing User: Prof. Tina Kahniashvili
Date Deposited: 29 Jan 2014 20:29
Last Modified: 27 Mar 2015 07:09

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