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

TitleThe First X-Ray Polarization Observation of the Black Hole X-Ray Binary 4U 1630-47 in the Steep Power-law State
Authors
Issue Date1-Nov-2023
PublisherAmerican Astronomical Society
Citation
Astrophysical Journal Letters, 2023, v. 958, n. 1, p. 1-12 How to Cite?
AbstractThe 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.
Persistent Identifierhttp://hdl.handle.net/10722/340785
ISSN
2023 Impact Factor: 8.8
2023 SCImago Journal Rankings: 2.766
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorCavero, NR-
dc.contributor.authorMarra, L-
dc.contributor.authorKrawczynski, H-
dc.contributor.authorDovciak, M-
dc.contributor.authorBianchi, S-
dc.contributor.authorSteiner, JF-
dc.contributor.authorSvoboda, J-
dc.contributor.authorCapitanio, F-
dc.contributor.authorMatt, G-
dc.contributor.authorNegro, M-
dc.contributor.authorIngram, A-
dc.contributor.authorVeledina, A-
dc.contributor.authorTaverna, R-
dc.contributor.authorKaras, V-
dc.contributor.authorUrsini, F-
dc.contributor.authorPodgorny, J-
dc.contributor.authorRatheesh, A-
dc.contributor.authorSuleimanov, V-
dc.contributor.authorMikusincová, R-
dc.contributor.authorZane, S-
dc.contributor.authorKaaret, P-
dc.contributor.authorMuleri, F-
dc.contributor.authorPoutanen, J-
dc.contributor.authorMalacaria, C-
dc.contributor.authorPetrucci, PO-
dc.contributor.authorGau, E-
dc.contributor.authorHu, K-
dc.contributor.authorChun, S-
dc.contributor.authorAgudo, I-
dc.contributor.authorAntonelli, LA-
dc.contributor.authorBachetti, M-
dc.contributor.authorBaldini, L-
dc.contributor.authorBaumgartner, WH-
dc.contributor.authorBellazzini, R-
dc.contributor.authorBongiorno, SD-
dc.contributor.authorBonino, R-
dc.contributor.authorBrez, A-
dc.contributor.authorBucciantini, N-
dc.contributor.authorCastellano, S-
dc.contributor.authorCavazzuti, E-
dc.contributor.authorChen, CT-
dc.contributor.authorCiprini, S-
dc.contributor.authorCosta, E-
dc.contributor.authorDe Rosa, A-
dc.contributor.authorDel Monte, E-
dc.contributor.authorDi Gesu, L-
dc.contributor.authorDi Lalla, N-
dc.contributor.authorDi Marco, A-
dc.contributor.authorDonnarumma, I-
dc.contributor.authorDoroshenko, V-
dc.contributor.authorEhlert, SR-
dc.contributor.authorEnoto, T-
dc.contributor.authorEvangelista, Y-
dc.contributor.authorFabiani, S-
dc.contributor.authorFerrazzoli, R-
dc.contributor.authorGarcía, JA-
dc.contributor.authorGunji, S-
dc.contributor.authorHayashida, K-
dc.contributor.authorHeyl, J-
dc.contributor.authorIwakiri, W-
dc.contributor.authorJorstad, SG-
dc.contributor.authorKislat, F-
dc.contributor.authorKitaguchi, T-
dc.contributor.authorKolodziejczak, JJ-
dc.contributor.authorLa Monaca, F-
dc.contributor.authorLatronico, L-
dc.contributor.authorLiodakis, I-
dc.contributor.authorMaldera, S-
dc.contributor.authorManfreda, A-
dc.contributor.authorMarin, F-
dc.contributor.authorMarinucci, A-
dc.contributor.authorMarscher, AP-
dc.contributor.authorMarshall, HL-
dc.contributor.authorMassaro, F-
dc.contributor.authorMitsuishi, I-
dc.contributor.authorMizuno, T-
dc.contributor.authorNg, CY-
dc.contributor.authorO'Dell, SL-
dc.contributor.authorOmodei, N-
dc.contributor.authorOppedisano, C-
dc.contributor.authorPapitto, A-
dc.contributor.authorPavlov, GG-
dc.contributor.authorPeirson, AL-
dc.contributor.authorPerri, M-
dc.contributor.authorPesce-Rollins, M-
dc.contributor.authorPilia, M-
dc.contributor.authorPossenti, A-
dc.contributor.authorPuccetti, S-
dc.contributor.authorRamsey, BD-
dc.contributor.authorRankin, J-
dc.contributor.authorRoberts, OJ-
dc.contributor.authorRomani, RW-
dc.contributor.authorSgrò, C-
dc.contributor.authorSlane, P-
dc.contributor.authorSpandre, G-
dc.contributor.authorSoffitta, P-
dc.contributor.authorSwartz, DA-
dc.contributor.authorTamagawa, T-
dc.contributor.authorTavecchio, F-
dc.contributor.authorTawara, Y-
dc.contributor.authorTennant, AF-
dc.contributor.authorThomas, NE-
dc.contributor.authorTombesi, F-
dc.contributor.authorTrois, A-
dc.contributor.authorTsygankov, SS-
dc.contributor.authorTurolla, R-
dc.contributor.authorVink, J-
dc.contributor.authorWeisskopf, MC-
dc.contributor.authorWu, KW-
dc.contributor.authorXie, F-
dc.date.accessioned2024-03-11T10:47:06Z-
dc.date.available2024-03-11T10:47:06Z-
dc.date.issued2023-11-01-
dc.identifier.citationAstrophysical Journal Letters, 2023, v. 958, n. 1, p. 1-12-
dc.identifier.issn2041-8205-
dc.identifier.urihttp://hdl.handle.net/10722/340785-
dc.description.abstractThe 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.-
dc.languageeng-
dc.publisherAmerican Astronomical Society-
dc.relation.ispartofAstrophysical Journal Letters-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.titleThe First X-Ray Polarization Observation of the Black Hole X-Ray Binary 4U 1630-47 in the Steep Power-law State-
dc.typeArticle-
dc.description.naturepreprint-
dc.identifier.doi10.3847/2041-8213/acfd2c-
dc.identifier.scopuseid_2-s2.0-85177743587-
dc.identifier.volume958-
dc.identifier.issue1-
dc.identifier.spage1-
dc.identifier.epage12-
dc.identifier.eissn2041-8213-
dc.identifier.isiWOS:001105907400001-
dc.publisher.placeBRISTOL-
dc.identifier.issnl2041-8205-

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