Magnetogenesis from early structure formation due to Yukawa forces

Journal Article · 05 November 2023 · Journal of Cosmology and Astroparticle Physics

DOI: https://doi.org/10.1088/1475-7516/2023/11/002 · OSTI ID:2259213

Durrer, Ruth ^[1]; Kusenko, Alexander ^[2]

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1. Université de Genève (Switzerland); University of California, Los Angeles, Los Angeles, California
2. University of California, Los Angeles, CA (United States); University of Tokyo, Chiba (Japan); European Organization for Nuclear Research (CERN), Geneva (Switzerland)

Yukawa interactions can mediate relatively long-range attractive forces between fermions in the early universe. Such a globally attractive interaction creates an instability that can result in the growth of structure in the affected species even during the radiation dominated era. The formation and collapse of fermionic microhalos can create hot fireballs at the sites of the collapsing halos which inject energy into the cosmic plasma. In this paper we study a new phenomena which can take place in such models. We show that the injected energy can be partially converted into primordial magnetic fields and we estimate the correlation scale and the power spectrum of these fields. We show that they may be the seeds of the observed astrophysical magnetic fields.

• Research Organization: University of California, Los Angeles, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• Grant/Contract Number: SC0009937
• OSTI ID: 2259213
• Journal Information: Journal of Cosmology and Astroparticle Physics, Journal Name: Journal of Cosmology and Astroparticle Physics Journal Issue: 11 Vol. 2023; ISSN 1475-7516
• Publisher: Institute of Physics (IOP)Copyright Statement
• Country of Publication: United States
• Language: English