Primordial magnetic field limits from cosmological data
Tina Kahniashvili, Alexander G. Tevzadze, Shiv K. Sethi, Kanhaiya, Pandey, and Bharat Ratra
TL;DR
This paper derives constraints on primordial magnetic fields using cosmological observations, emphasizing that the effective magnetic field value is the key parameter, regardless of the field's origin.
Contribution
It provides a model-independent analysis of primordial magnetic field limits based on diverse cosmological data sets.
Findings
Limits on the effective magnetic field strength from cosmological data.
The constraints are independent of the magnetic field's generation mechanism.
Combines data from BBN, CMB polarization, and large-scale structure.
Abstract
We study limits on a primordial magnetic field arising from cosmological data, including that from big bang nucleosynthesis, cosmic microwave background polarization plane Faraday rotation limits, and large-scale structure formation. We show that the physically-relevant quantity is the value of the effective magnetic field, and limits on it are independent of how the magnetic field was generated.
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