Article Dans Une Revue The Astrophysical Journal Letters Année : 2025

Detection of Compton Scattering in the Jet of 3C 84

Ioannis Liodakis (1) , Sudip Chakraborty (2) , Frédéric Marin (3) , Steven R Ehlert (2) , Thibault Barnouin (3) , Pouya M Kouch , Kari Nilsson (4) , Elina Lindfors , Tapio Pursimo , Georgios F Paraschos , Riccardo Middei (5, 6) , Anna Trindade Falcão , Svetlana Jorstad (7) , Iván Agudo (8) , Yuri Y Kovalev , Jacob J Casey , Laura Di Gesu (6) , Philip Kaaret (2) , Dawoon E Kim (5, 9, 10) , Fabian Kislat (11) , Ajay Ratheesh (5) , M. Lynne Saade , Francesco Tombesi (12, 13) , Alan Marscher (7) , Francisco José Aceituno , Giacomo Bonnoli (8, 14, 8) , Víctor Casanova (8, 14, 8) , Gabriel Emery (8, 14, 8) , Juan Escudero Pedrosa (8) , Daniel Morcuende (8, 14, 8) , Jorge Otero-Santos , Alfredo Sota (8, 14, 8) , Vilppu Piirola , Rumen Bachev , Anton Strigachev , George A Borman , Tatiana S Grishina , Vladimir A Hagen-Thorn , Evgenia N Kopatskaya , Elena G Larionova , Daria A Morozova , Sergey S Savchenko , Ekaterina V Shishkina , Ivan S Troitskiy , Yulia V Troitskaya , Andrey A Vasilyev , Alexey V Zhovtan , Ioannis Myserlis , Mark Gurwell , Garrett Keating , Ramprasad Rao , Sincheol Kang , Sang-Sung Lee , Sanghyun Kim , Whee Yeon Cheong , Hyeon-Woo Jeong , Chanwoo Song , Shan Li , Myeong-Seok Nam , Diego Álvarez-Ortega , Carolina Casadio , Emmanouil Angelakis , Alexander Kraus , Jenni Jormanainen , Vandad Fallah Ramazani , Chien-Ting Chen , Enrico Costa , Eugene Churazov , Riccardo Ferrazzoli , Giorgio Galanti , Ildar Khabibullin , Stephen L O’dell , Luigi Pacciani , Marco Roncadelli , Oliver J Roberts , Paolo Soffitta , Douglas A Swartz , Fabrizio Tavecchio , Martin C Weisskopf , Irina Zhuravleva
Pouya M Kouch
Elina Lindfors
Tapio Pursimo
Georgios F Paraschos
Anna Trindade Falcão
Yuri Y Kovalev
Jacob J Casey
Laura Di Gesu
Fabian Kislat
M. Lynne Saade
Francisco José Aceituno
  • Fonction : Auteur
Jorge Otero-Santos
Vilppu Piirola
Rumen Bachev
Anton Strigachev
  • Fonction : Auteur
George A Borman
Tatiana S Grishina
Vladimir A Hagen-Thorn
Evgenia N Kopatskaya
Elena G Larionova
Daria A Morozova
Sergey S Savchenko
Ekaterina V Shishkina
Ivan S Troitskiy
Yulia V Troitskaya
Andrey A Vasilyev
Alexey V Zhovtan
  • Fonction : Auteur
Ioannis Myserlis
Mark Gurwell
Garrett Keating
Ramprasad Rao
Sincheol Kang
Sang-Sung Lee
Sanghyun Kim
Whee Yeon Cheong
Hyeon-Woo Jeong
Chanwoo Song
Shan Li
Myeong-Seok Nam
Diego Álvarez-Ortega
Carolina Casadio
Emmanouil Angelakis
Alexander Kraus
Jenni Jormanainen
Vandad Fallah Ramazani
Chien-Ting Chen
Enrico Costa
Eugene Churazov
  • Fonction : Auteur
Riccardo Ferrazzoli
Giorgio Galanti
  • Fonction : Auteur
Ildar Khabibullin
Stephen L O’dell
Luigi Pacciani
Marco Roncadelli
  • Fonction : Auteur
Oliver J Roberts
Paolo Soffitta
Douglas A Swartz
Fabrizio Tavecchio
Martin C Weisskopf
Irina Zhuravleva

Résumé

3C 84 is the brightest cluster galaxy in the Perseus Cluster. It is among the closest radio-loud active galaxies and among the very few that can be detected from low-frequency radio up to TeV γ-rays. Here we report on the first X-ray polarization observation of 3C 84 with the Imaging X-ray Polarimetry Explorer, for a total of 2.2 Ms coinciding with a flare in γ-rays. This is the longest observation for a radio-loud active galaxy, which allowed us to reach unprecedented sensitivity, leading to the detection of an X-ray polarization degree of Π X = 4.2% ± 1.3% (∼3.2σ confidence) at an X-ray electric vector polarization angle of ψ X = 163°± 9°, which is aligned with the radio jet direction on the sky. Optical polarization observations show fast variability about the jet axis as well. Our results strongly favor models in which X-rays are produced by Compton scattering from relativistic electronsspecifically synchrotron self-Compton-that takes place downstream, away from the supermassive black hole.

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Dates et versions

insu-05371278 , version 1 (18-11-2025)

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Ioannis Liodakis, Sudip Chakraborty, Frédéric Marin, Steven R Ehlert, Thibault Barnouin, et al.. Detection of Compton Scattering in the Jet of 3C 84. The Astrophysical Journal Letters, 2025, 994 (1), pp.L9. ⟨10.3847/2041-8213/ae157d⟩. ⟨insu-05371278⟩
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