Issue |
A&A
Volume 691, November 2024
|
|
---|---|---|
Article Number | A34 | |
Number of page(s) | 5 | |
Section | Extragalactic astronomy | |
DOI | https://doi.org/10.1051/0004-6361/202450138 | |
Published online | 29 October 2024 |
Constraint on magnetized galactic outflows from LOFAR rotation measure data
1
Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
2
Université de Paris Cité, CNRS, Laboratoire Astroparticule et Cosmologie, F-75013 Paris, France
⋆ Corresponding author; andrii.neronov@apc.in2p3.fr
Received:
27
March
2024
Accepted:
8
August
2024
Outflows from galaxies that are driven by active galactic nuclei and star formation activity spread magnetic fields into the intergalactic medium. The importance of this process can be assessed using cosmological magnetohydrodynamical numerical modeling of the baryonic feedback on the large-scale structure, such as that of IllustrisTNG simulations. We use the Faraday rotation measure data of the LOFAR Two-Metre Sky Survey (LoTSS) to test the IllustrisTNG baryonic feedback model. We show that the IllustrisTNG overpredicts the root mean square of the residual rotation measure in LoTSS, which suggests that pollution of the intergalactic medium by magnetized outflows from galaxies is less important than the estimate from IllustrisTNG. This fact supports the hypothesis that the volume-filling large-scale magnetic fields in voids of the large-scale structure are of cosmological origin.
Key words: magnetic fields / methods: numerical / large-scale structure of Universe / radio continuum: general
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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