2025A&A...696L...8N

Query : 2025A&A...696L...8N

2025A&A...696L...8N - Astronomy and Astrophysics, volume 696L8 (2025/4-1)

Intergalactic magnetism in a γ-ray beam as a model of Porphyrion.

NERONOV A., VAZZA F., BRANDENBURG A. and CAPRINI C.

Abstract (from CDS):

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.

Abstract Copyright: © The Authors 2025

Journal keyword(s): magnetic fields - galaxies: active - galaxies: jets - large-scale structure of Universe - gamma rays: galaxies - radio lines: galaxies

Simbad objects: 1

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Number of rows : 1
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME Porphyrion out 15 29.6 +60 15           ~ 6 0

Query : 2025A&A...696L...8N

Basic data :
NAME Porphyrion -- Outflow
Other object types: otypes_help 		out (2024Natur)
ICRS coord. (ep=J2000) : 		15 29 36.0 +60 15 00 [ ] E 2024Natur.633..537O
FK4 coord. (ep=B1950 eq=1950) : 		15 28 35.0 +60 25 13 [ ]
Gal coord. (ep=J2000) : 		095.0937 +47.4304 [ ]
Angular size (arcmin): 		10 0.5 30 (~) E 2024Natur.633..537O
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NAME Porphyrion

References (6 between 1850 and 2026) (Total 6)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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