학술논문
Detection of X-ray Polarization from the Blazar 1ES 1959+650 with the Imaging X-ray Polarimetry Explorer
Document Type
Working Paper
Author
Errando, Manel; Liodakis, Ioannis; Marscher, Alan P.; Marshall, Herman L.; Middei, Riccardo; Negro, Michela; Peirson, Abel Lawrence; Perri, Matteo; Puccetti, Simonetta; Rabinowitz, Pazit L.; Agudo, Iván; Jorstad, Svetlana G.; Savchenko, Sergey S.; Blinov, Dmitry; Bourbah, Ioakeim G.; Kiehlmann, Sebastian; Kontopodis, Evangelos; Mandarakas, Nikos; Romanopoulos, Stylianos; Skalidis, Raphael; Vervelaki, Anna; Aceituno, Francisco José; Bernardos, Maria I.; Bonnoli, Giacomo; Casanova, Víctor; Agís-González, Beatriz; Husillos, César; Marchini, Alessandro; Sota, Alfredo; Kouch, Pouya M.; Lindfors, Elina; Casadio, Carolina; Escudero, Juan; Myserlis, Ioannis; Imazawa, Ryo; Sasada, Mahito; Fukazawa, Yasushi; Kawabata, Koji S.; Uemura, Makoto; Mizuno, Tsunefumi; Nakaoka, Tatsuya; Akitaya, Hiroshi; Gurwell, Mark; Keating, Garrett K.; Rao, Ramprasad; Ingram, Adam; Massaro, Francesco; Antonelli, Lucio Angelo; Bonino, Raffaella; Cavazzuti, Elisabetta; Chen, Chien-Ting; Cibrario, Nicolò; Ciprini, Stefano; De Rosa, Alessandra; Di Gesu, Laura; Di Pierro, Federico; Donnarumma, Immacolata; Ehlert, Steven R.; Fenu, Francesco; Gau, Ephraim; Karas, Vladimir; Kim, Dawoon E.; Krawczynski, Henric; Laurenti, Marco; Lisalda, Lindsey; López-Coto, Rubén; Madejski, Grzegorz; Marin, Frédéric; Marinucci, Andrea; Mitsuishi, Ikuyuki; Muleri, Fabio; Pacciani, Luigi; Paggi, Alessandro; Petrucci, Pierre-Olivier; Cavero, Nicole Rodriguez; Romani, Roger W.; Tavecchio, Fabrizio; Tugliani, Stefano; Wu, Kinwah; Bachetti, Matteo; Baldini, Luca; Baumgartner, Wayne H.; Bellazzini, Ronaldo; Bianchi, Stefano; Bongiorno, Stephen D.; Brez, Alessandro; Bucciantini, Niccolò; Capitanio, Fiamma; Castellano, Simone; Costa, Enrico; Del Monte, Ettore; Di Lalla, Niccolò; Di Marco, Alessandro; Doroshenko, Victor; Dovčiak, Michal; Enoto, Teruaki; Evangelista, Yuri; Fabiani, Sergio; Ferrazzoli, Riccardo; Garcia, Javier A.; Gunji, Shuichi; Hayashida, Kiyoshi; Heyl, Jeremy; Iwakiri, Wataru; Kaaret, Philip; Kislat, Fabian; Kitaguchi, Takao; Kolodziejczak, Jeffery J.; La Monaca, Fabio; Latronico, Luca; Maldera, Simone; Manfreda, Alberto; Matt, Giorgio; Ng, C. -Y.; O'Dell, Stephen L.; Omodei, Nicola; Oppedisano, Chiara; Papitto, Alessandro; Pavlov, George G.; Pesce-Rollins, Melissa; Pilia, Maura; Possenti, Andrea; Poutanen, Juri; Ramsey, Brian D.; Rankin, John; Ratheesh, Ajay; Roberts, Oliver J.; Sgrò, Carmelo; Slane, Patrick; Soffitta, Paolo; Spandre, Gloria; Swartz, Douglas A.; Tamagawa, Toru; Taverna, Roberto; Tawara, Yuzuru; Tennant, Allyn F.; Thomas, Nicholas E.; Tombesi, Francesco; Trois, Alessio; Tsygankov, Sergey S.; Turolla, Roberto; Vink, Jacco; Weisskopf, Martin C.; Xie, Fei; Zane, Silvia
Source
The Astrophysical Journal, 963 (2024) 5
Subject
Language
Abstract
Observations of linear polarization in the 2-8 keV energy range with the Imaging X-ray Polarimetry Explorer (IXPE) explore the magnetic field geometry and dynamics of the regions generating non-thermal radiation in relativistic jets of blazars. These jets, particularly in blazars whose spectral energy distribution peaks at X-ray energies, emit X-rays via synchrotron radiation from high-energy particles within the jet. IXPE observations of the X-ray selected BL Lac-type blazar 1ES 1959+650 in 2022 May 3-4 showed a significant linear polarization degree of $\Pi_\mathrm{x} = 8.0\% \pm 2.3\%$ at an electric-vector position angle $\psi_\mathrm{x} = 123^\circ \pm 8^\circ$. However, in 2022 June 9-12, only an upper limit of $\Pi_\mathrm{x} \leq 5.1\%$ could be derived (at the 99% confidence level). The degree of optical polarization at that time $\Pi_\mathrm{O} \sim 5\%$ is comparable to the X-ray measurement. We investigate possible scenarios for these findings, including temporal and geometrical depolarization effects. Unlike some other X-ray selected BL Lac objects, there is no significant chromatic dependence of the measured polarization in 1ES 1959+650, and its low X-ray polarization may be attributed to turbulence in the jet flow with dynamical timescales shorter than 1 day.
Comment: 16 pages, 4 figures, accepted for publication in The Astrophysical Journal
Comment: 16 pages, 4 figures, accepted for publication in The Astrophysical Journal