TY  - JOUR
IS  - 7937
PB  - Springer Science and Business Media LLC
Y1  - 2022/11/24/
A1  - Liodakis, Ioannis
A1  - Marscher, Alan P
A1  - Agudo, Iván
A1  - Berdyugin, Andrei V
A1  - Bernardos, Maria I
A1  - Bonnoli, Giacomo
A1  - Borman, George A
A1  - Casadio, Carolina
A1  - Casanova, V? Ctor
A1  - Cavazzuti, Elisabetta
A1  - Rodriguez Cavero, Nicole
A1  - Di Gesu, Laura
A1  - Di Lalla, Niccoló
A1  - Donnarumma, Immacolata
A1  - Ehlert, Steven R
A1  - Errando, Manel
A1  - Escudero, Juan
A1  - Garc? A-Comas, Maya
A1  - Ag? S-González, Beatriz
A1  - Husillos, César
A1  - Jormanainen, Jenni
A1  - Jorstad, Svetlana G
A1  - Kagitani, Masato
A1  - Kopatskaya, Evgenia N
A1  - Kravtsov, Vadim
A1  - Krawczynski, Henric
A1  - Lindfors, Elina
A1  - Larionova, Elena G
A1  - Madejski, Grzegorz M
A1  - Marin, Frédéric
A1  - Marchini, Alessandro
A1  - Marshall, Herman L
A1  - Morozova, Daria A
A1  - Massaro, Francesco
A1  - Masiero, Joseph R
A1  - Mawet, Dimitri
A1  - Middei, Riccardo
A1  - Millar-Blanchaer, Maxwell A
A1  - Myserlis, Ioannis
A1  - Negro, Michela
A1  - Nilsson, Kari
A1  - O'Dell, Stephen L
A1  - Omodei, Nicola
A1  - Pacciani, Luigi
A1  - Paggi, Alessandro
A1  - Panopoulou, Georgia V
A1  - Peirson, Abel L
A1  - Perri, Matteo
A1  - Petrucci, Pierre-Olivier
A1  - Poutanen, Juri
A1  - Puccetti, Simonetta
A1  - Romani, Roger W
A1  - Sakanoi, Takeshi
A1  - Savchenko, Sergey S
A1  - Sota, Alfredo
A1  - Tavecchio, Fabrizio
A1  - Tinyanont, Samaporn
A1  - Vasilyev, Andrey A
A1  - Weaver, Zachary R
A1  - Zhovtan, Alexey V
A1  - Antonelli, Lucio A
A1  - Bachetti, Matteo
A1  - Baldini, Luca
A1  - Baumgartner, Wayne H
A1  - Bellazzini, Ronaldo
A1  - Bianchi, Stefano
A1  - Bongiorno, Stephen D
A1  - Bonino, Raffaella
A1  - Brez, Alessandro
A1  - Bucciantini, Niccoló
A1  - Capitanio, Fiamma
A1  - Castellano, Simone
A1  - Ciprini, Stefano
A1  - Costa, Enrico
A1  - De Rosa, Alessandra
A1  - Del Monte, Ettore
A1  - Di Marco, Alessandro
A1  - Doroshenko, Victor
A1  - Dov?iak, Michal
A1  - Enoto, Teruaki
A1  - Evangelista, Yuri
A1  - Fabiani, Sergio
A1  - Ferrazzoli, Riccardo
A1  - Garcia, Javier A
A1  - Gunji, Shuichi
A1  - Hayashida, Kiyoshi
A1  - Heyl, Jeremy
A1  - Iwakiri, Wataru
A1  - Karas, Vladimir
A1  - Kitaguchi, Takao
A1  - Kolodziejczak, Jeffery J
A1  - La Monaca, Fabio
A1  - Latronico, Luca
A1  - Maldera, Simone
A1  - Manfreda, Alberto
A1  - Marinucci, Andrea
A1  - Matt, Giorgio
A1  - Mitsuishi, Ikuyuki
A1  - Mizuno, Tsunefumi
A1  - Muleri, Fabio
A1  - Ng, Stephen C-Y
A1  - Oppedisano, Chiara
A1  - Papitto, Alessandro
A1  - Pavlov, George G
A1  - Pesce-Rollins, Melissa
A1  - Pilia, Maura
A1  - Possenti, Andrea
A1  - Ramsey, Brian D
A1  - Rankin, John
A1  - Ratheesh, Ajay
A1  - Sgró, Carmelo
A1  - Slane, Patrick
A1  - Soffitta, Paolo
A1  - Spandre, Gloria
A1  - Tamagawa, Toru
A1  - Taverna, Roberto
A1  - Tawara, Yuzuru
A1  - Tennant, Allyn F
A1  - Thomas, Nicolas E
A1  - Tombesi, Francesco
A1  - Trois, Alessio
A1  - Tsygankov, Sergey
A1  - Turolla, Roberto
A1  - Vink, Jacco
A1  - Weisskopf, Martin C
A1  - Wu, Kinwah
A1  - Xie, Fei
A1  - Zane, Silvia
SN  - 0028-0836
N1  - Open Access: This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article?s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article?s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.
ID  - discovery10160826
AV  - public
EP  - 681
JF  - Nature
N2  - Most of the light from blazars, active galactic nuclei with jets of magnetized plasma that point nearly along the line of sight, is produced by high-energy particles, up to around 1?TeV. Although the jets are known to be ultimately powered by a supermassive black hole, how the particles are accelerated to such high energies has been an unanswered question. The process must be related to the magnetic field, which can be probed by observations of the polarization of light from the jets. Measurements of the radio to optical polarization-the only range available until now-probe extended regions of the jet containing particles that left the acceleration site days to years earlier1-3, and hence do not directly explore the acceleration mechanism, as could X-ray measurements. Here we report the detection of X-ray polarization from the blazar Markarian 501 (Mrk 501). We measure an X-ray linear polarization degree ?X of around 10%, which is a factor of around 2 higher than the value at optical wavelengths, with a polarization angle parallel to the radio jet. This points to a shock front as the source of particle acceleration and also implies that the plasma becomes increasingly turbulent with distance from the shock.
VL  - 611
SP  - 677
UR  - https://doi.org/10.1038/s41586-022-05338-0
TI  - Polarized blazar X-rays imply particle acceleration in shocks
KW  - X-Rays
KW  -  Radiography
KW  -  Acceleration
KW  -  Aircraft
KW  -  Cell Nucleus
ER  -