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.

[img]
Preview
Text
kmnbt13.pdf

Download (713kB) | Preview

Abstract

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
URI: http://eprints.iliauni.edu.ge/id/eprint/770

Actions (login required)

View Item View Item