Year: 2025
Type: article
Abstract: We estimate the magnetic field in the jets of the recently discovered 7 Mpc long Porphyrion system. We used nondetection of the system in gamma-rays to derive a lower bound on the co-moving magnetic field strength at the level of ∼10 nG (comoving). This value is consistent with recent estimates of magnetic fields in the filaments of the large-scale structure. We discuss the possibility that, instead of being the extreme case of a radio jet formation scenario, Porphyrion actually traces a very high-energy γ -ray beam emitted by an active galactic nucleus. In such a model, jets do not need to spread into the voids of the large-scale structure to appear straight on a very large distance range, and several anomalies of the standard radio jet scenarios can be solved at once.
Source: Astronomy and Astrophysics
Institutions: Centre National de la Recherche Scientifique, Université Paris Cité, École Polytechnique Fédérale de Lausanne, Istituto di Radioastronomia di Bologna, National Institute for Astrophysics, University of Bologna, Stockholm University, Ilia State University, Carnegie Mellon University, KTH Royal Institute of Technology, University of Geneva, European Organization for Nuclear Research
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,865
Funders: Fondazione Cariplo, Vetenskapsrådet
OpenAlex ID: W4408937382