Polarized x-rays from a magnetar

被引：34

作者：

Taverna, Roberto ^{[1
]}

Turolla, Roberto ^{[1
,2
]}

Muleri, Fabio ^{[3
]}

Heyl, Jeremy ^{[4
]}

Zane, Silvia ^{[2
]}

Baldini, Luca ^{[5
,6
]}

Gonzalez-Caniulef, Denis ^{[4
]}

Bachetti, Matteo ^{[7
]}

Rankin, John ^{[3
]}

Caiazzo, Ilaria ^{[8
]}

Di Lalla, Niccolo ^{[9
,10
]}

Doroshenko, Victor ^{[11
]}

Errando, Manel ^{[12
,13
]}

Gau, Ephraim ^{[12
,13
]}

Kirmizibayrak, Demet ^{[4
]}

Krawczynski, Henric ^{[12
,13
]}

Negro, Michela ^{[14
,15
,16
]}

Ng, Mason ^{[17
]}

Omodei, Nicola ^{[9
,10
]}

Possenti, Andrea ^{[7
]}

Tamagawa, Toru ^{[18
,19
,20
]}

Uchiyama, Keisuke ^{[19
,20
]}

Weisskopf, Martin C. ^{[21
]}

Agudo, Ivan ^{[22
]}

Antonelli, Lucio A. ^{[23
,24
]}

Baumgartner, Wayne H. ^{[21
]}

Bellazzini, Ronaldo ^{[6
]}

Bianchi, Stefano ^{[25
]}

Bongiorno, Stephen D. ^{[21
]}

Bonino, Raffaella ^{[26
,27
]}

Brez, Alessandro ^{[6
]}

Bucciantini, Niccolo ^{[28
,29
,30
]}

Capitanio, Fiamma ^{[3
]}

Castellano, Simone ^{[6
]}

Cavazzuti, Elisabetta ^{[31
]}

Ciprini, Stefano ^{[24
,32
]}

Costa, Enrico ^{[3
]}

De Rosa, Alessandra ^{[3
]}

Del Monte, Ettore ^{[3
]}

Di Gesu, Laura ^{[31
]}

Di Marco, Alessandro ^{[3
]}

Donnarumma, Immacolata ^{[31
]}

Doviak, Michal ^{[33
]}

Ehlert, Steven R. ^{[21
]}

Enoto, Teruaki ^{[18
]}

Evangelista, Yuri ^{[3
]}

Fabiani, Sergio ^{[3
]}

Ferrazzoli, Riccardo ^{[3
]}

Garcia, Javier A. ^{[34
]}

Gunji, Shuichi ^{[35
]}

机构：

[1] Univ Padua, Dept Phys & Astron, I-35131 Padua, Italy

[2] Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England

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

[4] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada

[5] Univ Pisa, Dipartimento Fis Enrico Fermi, I-56127 Pisa, Italy

[6] Ist Nazl Fis Nucl INFN, Sez Pisa, I-56127 Pisa, Italy

[7] INAF, Osservatorio Astron Cagliari, I-09047 Selargius, Italy

[8] CALTECH, Theoret AstroPhys Including Relat & Cosmol, Pasadena, CA 91125 USA

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

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

[11] Univ Tubingen, Inst Astron & Astrophys, D-72076 Tubingen, Germany

[12] Washington Univ, Phys Dept, St Louis, MO 63130 USA

[13] Washington Univ, McDonnell Ctr Space Sci, St Louis, MO 63130 USA

[14] Univ Maryland, Ctr Space Sci & Technol, Baltimore, MD 21250 USA

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

[16] NASA GSFC, Ctr Res & Explorat Space Sci & Technol, Greenbelt, MD 20771 USA

[17] MIT, Kavli Inst Astrophys & Space Res, Cambridge, MA 02139 USA

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

[19] RIKEN Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan

[20] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, 1-3 Kagurazaka, Tokyo 1628601, Japan

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

[22] Inst Astrofis Andalucia, Granada 18008, Spain

[23] INAF, Osservatorio Astron Roma, I-00040 Monte Porzio Catone, Italy

[24] Agenzia Spaziale Italiana ASI, Space Sci Data Ctr SSDC, I-00133 Rome, Italy

[25] Univ Roma Tre, Dipartimento Matemat & Fis, I-00146 Rome, Italy

[26] Ist Nazl Fis Nucl, Sez Torino, I-10125 Turin, Italy

[27] Univ Torino, Dipartimento Fis, I-10125 Turin, Italy

[28] INAF, Osservatorio Astrofis Arcetri, I-50125 Florence, Italy

[29] Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy

[30] Ist Nazl Fis Nucl, Sez Firenze, I-50019 Sesto Fiorentino, Italy

[31] ASI, I-00133 Rome, Italy

[32] Ist Nazl Fis Nucl, Sez Roma Tor Vergata, I-00133 Rome, Italy

[33] Czech Acad Sci, Astron Inst, Prague 141004, Czech Republic

[34] CALTECH, Cahill Ctr Astron & Astrophys, Pasadena, CA 91125 USA

[35] Yamagata Univ, Dept Phys, 1-4-12 Kojirakawa Machi, Yamagata 9908560, Japan

[36] Osaka Univ, Dept Earth & Space Sci, 1-1 Yamadaoka, Suita, Osaka 5650871, Japan

[37] Chuo Univ, Dept Phys, Bunkyo Ku, 1-13-27 Kasuga, Tokyo, Fukuoka 1128551, Japan

[38] Boston Univ, Inst Astrophys Res, Boston, MA 02215 USA

[39] St Petersburg Univ, Lab Observat Astrophys, St Petersburg 199034, Russia

[40] Univ Turku, Finnish Ctr Astron, European Southern Observ, Turku 20014, Finland

[41] Univ Strasbourg, Observ Astronom Strasbourg, F-67000 Strasbourg, France

[42] Nagoya Univ, Grad Sch Sci, Div Particle & Astrophys Sci, Chikusa Ku, Nagoya, Aichi 4648602, Japan

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

[44] Univ Hong Kong, Dept Phys, Pokfulam, Hong Kong, Peoples R China

[45] Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16801 USA

[46] Univ Turku, Dept Phys & Astron, Turku 20014, Finland

[47] Russian Acad Sci, Space Res Inst, Moscow 117997, Russia

[48] Harvard & Smithsonian, Ctr Astrophys, Cambridge, MA 02138 USA

[49] INAF, Osservatorio Astron Brera, I-23807 Merate, Italy

[50] Univ Roma Tor Vergata, Dipartimento Fis, I-00133 Rome, Italy

来源：

SCIENCE | 2022年 / 378卷 / 6620期

基金：

加拿大自然科学与工程研究理事会;

关键词：

NEUTRON-STARS; EMISSION; SPECTRA; ORIGIN;

D O I：

10.1126/science.add0080

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Magnetars are neutron stars with ultrastrong magnetic fields, which can be observed in x-rays. Polarization measurements could provide information on their magnetic fields and surface properties. We observed polarized x-rays from the magnetar 4U 0142+61 using the Imaging X-ray Polarimetry Explorer and found a linear polarization degree of 13.5 +/- 0.8% averaged over the 2- to 8-kilo-electron volt band. The polarization changes with energy: The degree is 15.0 +/- 1.0% at 2 to 4 kilo-electron volts, drops below the instrumental sensitivity similar to 4 to 5 kilo-electron volts, and rises to 35.2 +/- 7.1% at 5.5 to 8 kilo-electron volts. The polarization angle also changes by 90 degrees at similar to 4 to 5 kilo-electron volts. These results are consistent with a model in which thermal radiation from the magnetar surface is reprocessed by scattering off charged particles in the magnetosphere.

引用

页码：646 / 649

页数：4

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