IXPE observation of PKS 2155-304 reveals the most highly polarized blazar

被引：15

作者：

Kouch, Pouya M. ^{[1
,2
,3
]}

Liodakis, Ioannis ^{[4
,5
]}

Middei, Riccardo ^{[9
,10
]}

Kim, Dawoon E. ^{[6
,7
,8
]}

Tavecchio, Fabrizio ^{[12
]}

Marscher, Alan P. ^{[13
]}

Marshall, Herman L. ^{[14
]}

Ehlert, Steven R. ^{[4
]}

Di Gesu, Laura ^{[37
]}

Jorstad, Svetlana G. ^{[13
,52
]}

Agudo, Ivan ^{[28
]}

Madejski, Grzegorz M. ^{[42
,43
]}

Romani, Roger W. ^{[40
,41
]}

Errando, Manel ^{[55
,56
]}

Lindfors, Elina ^{[1
,2
]}

Nilsson, Kari ^{[2
]}

Toppari, Ella ^{[1
,2
]}

Potter, Stephen B. ^{[15
,16
]}

Imazawa, Ryo ^{[17
]}

Sasada, Mahito ^{[19
]}

Fukazawa, Yasushi ^{[17
,18
,20
]}

Kawabata, Koji S. ^{[17
,18
,20
]}

Uemura, Makoto ^{[17
,18
,20
]}

Mizuno, Tsunefumi ^{[17
]}

Nakaoka, Tatsuya ^{[18
]}

Akitaya, Hiroshi ^{[21
]}

McCall, Callum ^{[72
]}

Jermak, Helen E. ^{[72
]}

Steele, Iain A. ^{[72
]}

Myserlis, Ioannis ^{[22
,23
]}

Gurwell, Mark ^{[24
]}

Keating, Garrett K. ^{[24
]}

Rao, Ramprasad ^{[24
]}

Kang, Sincheol ^{[25
]}

Lee, Sang-Sung ^{[25
,26
]}

Kim, Sang-Hyun ^{[25
,26
]}

Cheong, Whee Yeon ^{[25
,26
]}

Jeong, Hyeon-Woo ^{[25
,26
]}

Angelakis, Emmanouil ^{[27
]}

Kraus, Alexander ^{[23
]}

Aceituno, Francisco Jose ^{[28
]}

Bonnoli, Giacomo ^{[12
,28
]}

Casanova, Victor ^{[28
]}

Escudero, Juan ^{[28
]}

Agis-Gonzalez, Beatriz ^{[5
,28
]}

Husillos, Cesar ^{[28
,73
]}

Morcuende, Daniel ^{[28
]}

Otero-Santos, Jorge ^{[28
]}

Sota, Alfredo ^{[28
]}

Bachev, Rumen ^{[70
,71
]}

机构：

[1] Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland

[2] Univ Turku, Finnish Ctr Astron ESO FINCA, Vesilinnantie 5, FI-20014 Turku, Finland

[3] Aalto Univ, Metsahovi Radio Observ, Metsahovintie 114, FI-02540 Kylmala, Finland

[4] NASA Marshall Space Flight Ctr, Huntsville, AL 35812 USA

[5] Inst Astrophys, Fdn Res & Technol Hellas, GR-70013 Iraklion, Greece

[6] INAF Ist Astrofis & Planetol Spaziali, I-00133 Rome, Italy

[7] Univ Roma La Sapienza, Dipartimento Fis, Piazzale Aldo Moro 5, I-00185 Rome, Italy

[8] Univ Roma Tor Vergata, Dipartimento Fis, Via Ric Sci 1, I-00133 Rome, Italy

[9] Agenzia Spaziale Italiana, Space Sci Data Ctr, Via Politecn Snc, I-00133 Rome, Italy

[10] INAF Osservatorio Astrono Roma, Via Frascati 33, I-00078 Monte Porzio Catone, RM, Italy

[11] INAF Osservatorio Astron Cagliari, Via Sci 5, I-09047 Selargius, CA, Italy

[12] INAF Osservatorio Astron Brera, Via E Bianchi 46, I-23807 Merate, LC, Italy

[13] Boston Univ, Inst Astrophys Res, 725 Commonwealth Ave, Boston, MA 02215 USA

[14] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[15] South African Astron Observ, POB 9, ZA-7935 Cape Town, South Africa

[16] Univ Johannesburg, Dept Phys, POB 524,Auckland Pk, ZA-2006 Johannesburg, South Africa

[17] Hiroshima Univ, Grad Sch Adv Sci & Engn, Dept Phys, Kagamiyama 1-3-1, Higashihiroshima, Hiroshima 7398526, Japan

[18] Hiroshima Univ, Hiroshima Astrophys Sci Ctr, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan

[19] Tokyo Inst Technol, Dept Phys, 2-12-1 Ookayama,Meguro Ku, Tokyo 1528551, Japan

[20] Hiroshima Univ, Core Res Energet Universe Core U, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 7398526, Japan

[21] Chiba Inst Technol, Planetary Explorat Res Ctr, 2-17-1 Tsudanuma, Narashino, Chiba 2750016, Japan

[22] Inst Radioastron Millimetr, Ave Divina Pastora 7, E-18012 Granada, Spain

[23] Max Planck Inst Radioastron, Hugel 69, D-53121 Bonn, Germany

[24] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[25] Korea Astron & Space Sci Inst, 776 Daedeok Daero, Daejeon 34055, South Korea

[26] Univ Sci & Technol, 217 Gajeong Ro, Daejeon 34113, South Korea

[27] Natl & Kapodistrian Univ Athens, Dept Phys, Sect Astrophys Astron & Mech, Zografos 15784, Greece

[28] CSIC, IAA, Inst Astrofis Andalucia, Glorieta Astronomia S-N, Granada 18008, Spain

[29] Ist Nazl Fis Nucl, Sez Pisa, Largo B Pontecorvo 3, I-56127 Pisa, Italy

[30] Univ Pisa, Dipartimento Fis, Largo B Pontecorvo 3, I-56127 Pisa, Italy

[31] Univ Roma Tre, Dipartimento Matemat & Fis, Via Vasca Navale 84, I-00146 Rome, Italy

[32] Ist Nazl Fis Nucleare, Sez Torino, Via Pietro Giuria 1, I-10125 Turin, Italy

[33] Univ Torino, Dipartimento Fis, Via Pietro Giuria 1, I-10125 Turin, Italy

[34] INAF Osservatorio Astrofis Arcetri, Largo Enrico Fermi 5, I-50125 Florence, Italy

[35] Univ Firenze, Dipartimento Fis & Astron, Via Sansone 1, I-50019 Sesto Fiorentino, FI, Italy

[36] Ist Nazl Fis Nucl, Sez Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, FI, Italy

[37] ASI Agenzia Spaziale Italiana, Via Politecn Snc, I-00133 Rome, Italy

[38] Univ Space Res Assoc, Inst Sci & Technol, Huntsville, AL 35805 USA

[39] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, Via Ric Sci 1, I-00133 Rome, Italy

[40] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[41] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 USA

[42] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[43] SLAC, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[44] Univ Tubingen, Inst Astron & Astrophys, Sand 1, D-72076 Tubingen, Germany

[45] Czech Acad Sci, Astron Inst, Bocni II 1401-1, Prague 14100 4, Czech Republic

[46] RIKEN Cluster Pioneering Res, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[47] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[48] Yamagata Univ, 1-4-12 Kojirakawa Machi, Yamagata 9908560, Japan

[49] Osaka Univ, 1-1 Yamadaoka, Suita, Osaka 5650871, Japan

[50] Univ British Columbia, Vancouver, BC V6T 1Z4, Canada

来源：

ASTRONOMY & ASTROPHYSICS | 2024年 / 689卷

基金：

日本学术振兴会; 英国科学技术设施理事会; 美国国家科学基金会; 美国国家航空航天局; 芬兰科学院; 新加坡国家研究基金会;

关键词：

magnetic fields; polarization; relativistic processes; BL Lacertae objects: individual: HSP; galaxies: jets; X-RAY-POLARIZATION; PARSEC-SCALE JETS; BL-LAC JETS; PARTICLE-ACCELERATION; OPTICAL POLARIZATION; RELATIVISTIC JETS; TEV BLAZARS; MULTIWAVELENGTH OBSERVATIONS; LINEAR-POLARIZATION; 1ES 1959+650;

D O I：

10.1051/0004-6361/202449166

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the X-ray polarization properties of the high-synchrotron-peaked (HSP) blazar PKS 2155-304 based on observations with the Imaging X-ray Polarimetry Explorer (IXPE). We observed the source between Oct 27 and Nov 7, 2023. We also conducted an extensive contemporaneous multiwavelength (MW) campaign. We find that during the first half (T-1) of the IXPE pointing, the source exhibited the highest X-ray polarization degree detected for an HSP blazar thus far, (30.7 +/- 2.0)%; this dropped to (15.3 +/- 2.1)% during the second half (T-2). The X-ray polarization angle remained stable during the IXPE pointing at 129.4 degrees +/- 1.8 degrees and 125.4 degrees +/- 3.9 degrees during T-1 and T-2, respectively. Meanwhile, the optical polarization degree remained stable during the IXPE pointing, with average host-galaxy-corrected values of (4.3 +/- 0.7)% and (3.8 +/- 0.9)% during the T-1 and T-2, respectively. During the IXPE pointing, the optical polarization angle changed achromatically from similar to 140 degrees to similar to 90 degrees and back to similar to 130 degrees. Despite several attempts, we only detected (99.7% conf.) the radio polarization once (during T-2, at 225.5 GHz): with degree (1.7 +/- 0.4)% and angle 112.5 degrees +/- 5.5 degrees. The direction of the broad pc-scale jet is rather ambiguous and has been found to point to the east and south at different epochs; however, on larger scales (> 1.5 pc) the jet points toward the southeast (similar to 135 degrees), similarly to all of the MW polarization angles. Moreover, the X-ray-to-optical polarization degree ratios of similar to 7 and similar to 4 during T-1 and T-2, respectively, are similar to previous IXPE results for several HSP blazars. These findings, combined with the lack of correlation of temporal variability between the MW polarization properties, agree with an energy-stratified shock-acceleration scenario in HSP blazars.

引用

页数：17

共 76 条

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