Polarization Properties of the Weakly Magnetized Neutron Star X-Ray Binary GS 1826-238 in the High Soft State

被引：30

作者：

Capitanio, Fiamma ^{[1
]}

Fabiani, Sergio ^{[1
]}

Gnarini, Andrea ^{[2
]}

Ursini, Francesco ^{[2
]}

Ferrigno, Carlo ^{[3
]}

Matt, Giorgio ^{[2
]}

Poutanen, Juri ^{[4
,5
]}

Cocchi, Massimo ^{[6
]}

Mikusincova, Romana ^{[2
]}

Farinelli, Ruben ^{[7
]}

Bianchi, Stefano ^{[2
]}

Kajava, Jari J. E. ^{[4
,8
]}

Muleri, Fabio ^{[1
]}

Sanchez-Fernandez, Celia ^{[9
]}

Soffitta, Paolo ^{[1
]}

Wu, Kinwah ^{[10
]}

Agudo, Ivan ^{[11
]}

Antonelli, Lucio A. ^{[12
,13
]}

Bachetti, Matteo ^{[6
]}

Baldini, Luca ^{[14
,15
]}

Baumgartner, Wayne H. ^{[16
]}

Bellazzini, Ronaldo ^{[14
]}

Bongiorno, Stephen D. ^{[16
]}

Bonino, Raffaella ^{[17
,18
]}

Brez, Alessandro ^{[14
]}

Bucciantini, Niccolo ^{[19
,20
,21
]}

Castellano, Simone ^{[14
]}

Cavazzuti, Elisabetta ^{[22
]}

Ciprini, Stefano ^{[13
,23
]}

Costa, Enrico ^{[1
]}

De Rosa, Alessandra ^{[1
]}

Del Monte, Ettore ^{[1
]}

Di Gesu, Laura ^{[22
]}

Di Lalla, Niccolo ^{[24
,25
]}

Di Marco, Alessandro ^{[1
,12
]}

Donnarumma, Immacolata ^{[22
]}

Doroshenko, Victor ^{[26
]}

Dovciak, Michal ^{[27
]}

Ehlert, Steven R. ^{[16
]}

Enoto, Teruaki ^{[28
]}

Evangelista, Yuri ^{[1
]}

Ferrazzoli, Riccardo ^{[1
]}

Garcia, Javier A. ^{[29
]}

Gunji, Shuichi ^{[30
]}

Hayashida, Kiyoshi ^{[31
]}

Heyl, Jeremy ^{[32
]}

Iwakiri, Wataru ^{[33
]}

Jorstad, Svetlana G. ^{[34
,35
]}

Karas, Vladimir ^{[27
]}

Kitaguchi, Takao ^{[28
]}

机构：

[1] INAF, Ist Astrofis & Planetol Spaziali, Via Fosso Cavaliere 100, I-00133 Rome, Italy

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

[3] Univ Geneva, Dept Astron, Ch Ecogia 16, CH-1290 Geneva, Switzerland

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

[5] Russian Acad Sci, Space Res Inst, Profsoyuznaya Str 84-32, Moscow 117997, Russia

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

[7] INAF, Osservatorio Astrofis & Sci Spazio Bologna, Via P Gobetti 101, I-40129 Bologna, Italy

[8] Aurora Technol European Space Agcy ESA, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, E-28692 Madrid, Spain

[9] ATG Europe European Space Agcy ESA, European Space Astron Ctr ESAC, Camino Bajo Castillo S-N, E-28692 Madrid, Spain

[10] Univ Coll London, Mullard Space Sci Lab, Sci Pk 904, Dorking RH5 6NT, Surrey, England

[11] CSIC, Inst Astrofis Andalucia, Glorieta Astron S-N, E-18008 Granada, Spain

[12] INAF, Osservatorio Astron Roma, Guangxi Key Lab Relativist Astrophys, Via Frascati 33, E-00040 Monte Porzio Catone, RM, Italy

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[27] Czech Acad Sci, Astron Inst, Bocni 2 1401-1, Prague 4, Czech Republic

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

[29] CALTECH, Pasadena, CA 91125 USA

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

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

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

[33] Chuo Univ, Fac Sci & Engn, Dept Phys, 1-13-27 Kasuga,Bunkyo Ku, Tokyo 1128551, Japan

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

[35] St Petersburg State Univ, Dept Astrophys, Univ Sky Pr 28, St Petersburg 198504, Russia

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

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

[38] Univ Turku, Finnish Ctr Astron ESO, FI-20014 Turku, Finland

[39] Univ Strasbourg, Observ Astron Strasbourg, CNRS, UMR 7550, F-67000 Strasbourg, France

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

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

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

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

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

[45] Univ Grenoble Alpes, CNRS, IPAG, F-38000 Grenoble, France

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

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

[48] Univ Padua, Dipartimento Fis & Astron, Via Marzolo 8, I-35131 Padua, Italy

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

[50] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

来源：

ASTROPHYSICAL JOURNAL | 2023年 / 943卷 / 02期

基金：

芬兰科学院; 俄罗斯科学基金会; 美国国家航空航天局;

关键词：

SPECTRAL EVOLUTION; CLOCKED BURSTER; LAYER EMISSION; BOUNDARY-LAYER; ACCRETION DISK; CYGNUS X-2; CONSTRAINTS; OSCILLATIONS; VARIABILITY; POLARLIGHT;

D O I：

10.3847/1538-4357/acae88

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The launch of the Imaging X-ray Polarimetry Explorer (IXPE) on 2021 December 9 has opened a new window in X-ray astronomy. We report here the results of the first IXPE observation of a weakly magnetized neutron star, GS 1826-238, performed on 2022 March 29-31 when the source was in a high soft state. An upper limit (99.73% confidence level) of 1.3% for the linear polarization degree is obtained over the IXPE 2-8 keV energy range. Coordinated INTEGRAL and NICER observations were carried out simultaneously with IXPE. The spectral parameters obtained from the fits to the broadband spectrum were used as inputs for Monte Carlo simulations considering different possible geometries of the X-ray emitting region. Comparing the IXPE upper limit with these simulations, we can put constraints on the geometry and inclination angle of GS 1826-238.

引用

页数：10

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