The First X-Ray Polarization Observation of the Black Hole X-Ray Binary 4U 1630-47 in the Steep Power-law State

被引：16

作者：

Rodriguez Cavero, Nicole ^{[1
,2
]}

Marra, Lorenzo ^{[3
]}

Krawczynski, Henric ^{[1
,2
]}

Dovciak, Michal ^{[4
]}

Bianchi, Stefano ^{[3
]}

Steiner, James F. ^{[5
]}

Svoboda, Jiri ^{[4
]}

Capitanio, Fiamma ^{[6
]}

Matt, Giorgio ^{[3
]}

Negro, Michela ^{[7
,8
,9
]}

Ingram, Adam ^{[10
]}

Veledina, Alexandra ^{[11
,12
,13
]}

Taverna, Roberto ^{[14
]}

Karas, Vladimir ^{[4
]}

Ursini, Francesco ^{[3
]}

Podgorny, Jakub ^{[4
,15
,16
]}

Ratheesh, Ajay ^{[6
]}

Suleimanov, Valery ^{[17
]}

Mikusincova, Romana ^{[3
]}

Zane, Silvia ^{[18
]}

Kaaret, Philip ^{[19
]}

Muleri, Fabio ^{[6
]}

Poutanen, Juri ^{[11
]}

Malacaria, Christian ^{[20
]}

Petrucci, Pierre-Olivier ^{[21
]}

Gau, Ephraim ^{[1
,2
]}

Hu, Kun ^{[1
,2
]}

Chun, Sohee ^{[1
,2
]}

Agudo, Ivan ^{[22
]}

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

Bachetti, Matteo ^{[25
]}

Baldini, Luca ^{[26
,27
]}

Baumgartner, Wayne H. ^{[19
]}

Bellazzini, Ronaldo ^{[26
]}

Bongiorno, Stephen D. ^{[19
]}

Bonino, Raffaella ^{[28
,29
]}

Brez, Alessandro ^{[26
]}

Bucciantini, Niccolo ^{[30
,31
,32
]}

Castellano, Simone ^{[26
]}

Cavazzuti, Elisabetta ^{[33
]}

Chen, Chien-Ting ^{[34
]}

Ciprini, Stefano ^{[24
]}

Costa, Enrico ^{[6
]}

De Rosa, Alessandra ^{[6
]}

Del Monte, Ettore ^{[6
]}

Di Gesu, Laura ^{[33
]}

Di Lalla, Niccolo ^{[35
,36
]}

Di Marco, Alessandro ^{[6
]}

Donnarumma, Immacolata ^{[33
]}

Doroshenko, Victor ^{[17
]}

机构：

[1] Washington Univ St Louis, Dept Phys, McDonnell Ctr Space Sci, St Louis, MO 63130 USA

[2] Washington Univ St Louis, Dept Phys, Ctr Quantum Leaps, St Louis, MO 63130 USA

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

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

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

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

[7] Univ Maryland Baltimore Cty, Baltimore, MD 21250 USA

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

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

[10] Newcastle Univ, Sch Math Stat & Phys, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

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

[12] KTH Royal Inst Technol, Nordita, Hannes Alfvens Vag 12, SE-10691 Stockholm, Sweden

[13] Stockholm Univ, Hannes Alfvens Vag 12, SE-10691 Stockholm, Sweden

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

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

[16] Charles Univ Prague, Astron Inst, V Holesovickach 2, CZ-18000 Prague, Czech Republic

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

[18] Univ Coll London, Mullard Space Sci Lab, Holmbury St Mary, Dorking RH5 6NT, Surrey, England

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

[20] Int Space Sci Inst ISSI, Hallerstr 6, CH-3012 Bern, Switzerland

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

[22] Inst Astrofis AndaluciaCSIC, Glorieta Astron S-N, E-18008 Granada, Spain

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[38] CALTECH, Pasadena, CA 91125 USA

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

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

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

[42] Chiba Univ, Int Ctr Hadron Astrophys, Chiba 2638522, Japan

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

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

[45] Univ New Hampshire, Dept Phys & Astron, Durham, NH 03824 USA

[46] Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA

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

[48] Ist Nazl Fis Nucl, Sez Napoli, Str Comunale Cinthia, I-80126 Naples, Italy

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

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

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2023年 / 958卷 / 01期

基金：

美国国家航空航天局;

关键词：

ACTIVE GALACTIC NUCLEI; ACCRETION DISK; CYGNUS X-1; MODEL; EMISSION; ABSORPTION; SPECTRUM; CHANDRA; CORONA; WIND;

D O I：

10.3847/2041-8213/acfd2c

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The Imaging X-ray Polarimetry Explorer (IXPE) observed the black hole X-ray binary 4U 1630-47 in the steep power-law (or very high) state. The observations reveal a linear polarization degree of the 2-8 keV X-rays of 6.8% +/- 0.2% at a position angle of 21.degrees 3 +/- 0.degrees 9 east of north (all errors at 1 sigma confidence level). Whereas the polarization degree increases with energy, the polarization angle stays constant within the accuracy of our measurements. We compare the polarization of the source in the steep power-law state with the previous IXPE measurement of the source in the high soft state. We find that, even though the source flux and spectral shape are significantly different between the high soft state and the steep power-law state, their polarization signatures are similar. Assuming that the polarization of both the thermal and power-law emission components are constant over time, we estimate the power-law component polarization to be 6.8%-7.0% and note that the polarization angle of the thermal and power-law components must be approximately aligned. We discuss the implications for the origin of the power-law component and the properties of the emitting plasma.

引用

页数：12

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