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Article: The X-ray polarization of the Seyfert 1 galaxy IC 4329A

TitleThe X-ray polarization of the Seyfert 1 galaxy IC 4329A
Authors
Keywordsgalaxies: active
galaxies: individual: IC 4329A
galaxies: Seyfert
polarization
Issue Date11-Sep-2023
PublisherOxford University Press
Citation
Monthly Notices of the Royal Astronomical Society, 2023, v. 525, n. 4, p. 5437-5449 How to Cite?
Abstract

We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for -500 ks, supported by XMM-Newton ( -60 ks) and NuSTAR ( -80 ks) exposures. We detect polarization in the 2-8 keV band with 2.97 sigma confidence. We report a polarization degree of 3.3 +/- 1.1 per cent and a polarization angle of 78 degrees +/- 10 degrees (errors are 1 sigma confidence). The X-ray polarization is consistent with being aligned with the radio jet, albeit partially due to large uncertainties on the radio position angle. We jointly fit the spectra from the three observatories to constrain the presence of a relativistic reflection component. From this, we obtain constraints on the inclination angle to the inner disc ( < 39 degrees at 99 per cent confidence) and the disc inner radius ( < 11 gravitational radii at 99 per cent confidence), although we note that modelling systematics in practice add to the quoted statistical error. Our spectropolarimetric modelling indicates that the 2-8 keV polarization is consistent with being dominated by emission directly observed from the X-ray corona, but the polarization of the reflection component is completely unconstrained. Our constraints on viewer inclination and polarization degree tentatively fa v our more asymmetric, possibly out-flowing, coronal geometries that produce more highly polarized emission, but the coronal geometry is unconstrained at the 3 sigma level.


Persistent Identifierhttp://hdl.handle.net/10722/340948
ISSN
2023 Impact Factor: 4.7
2023 SCImago Journal Rankings: 1.621
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorIngram, A-
dc.contributor.authorEwing, M-
dc.contributor.authorMarinucci, A-
dc.contributor.authorTagliacozzo, D-
dc.contributor.authorRosario, D J-
dc.contributor.authorVeledina, A-
dc.contributor.authorKim, D E-
dc.contributor.authorMarin, F-
dc.contributor.authorBianchi, S-
dc.contributor.authorPoutanen, J-
dc.contributor.authorMatt, G-
dc.contributor.authorMarshall, H L-
dc.contributor.authorUrsini, F-
dc.contributor.authorde Rosa, A-
dc.contributor.authorPetrucci, P-O-
dc.contributor.authorMadejski, G-
dc.contributor.authorBarnouin, T-
dc.contributor.authordi Gesu, L-
dc.contributor.authorDovčiak, M-
dc.contributor.authorGianolli, V E-
dc.contributor.authorKrawczynski, H-
dc.contributor.authorLoktev, V-
dc.contributor.authorMiddei, R-
dc.contributor.authorPodgorny, J-
dc.contributor.authorPuccetti, S-
dc.contributor.authorRatheesh, A-
dc.contributor.authorSoffitta, P-
dc.contributor.authorTombesi, F-
dc.contributor.authorEhlert, S R-
dc.contributor.authorMassaro, F-
dc.contributor.authorAgudo, I-
dc.contributor.authorAntonelli, L A-
dc.contributor.authorBachetti, M-
dc.contributor.authorBaldini, L-
dc.contributor.authorBaumgartner, W H-
dc.contributor.authorBellazzini, R-
dc.contributor.authorBongiorno, S D-
dc.contributor.authorBonino, R-
dc.contributor.authorBrez, A-
dc.contributor.authorBucciantini, N-
dc.contributor.authorCapitanio, F-
dc.contributor.authorCastellano, S-
dc.contributor.authorCavazzuti, E-
dc.contributor.authorChen, C-T-
dc.contributor.authorCiprini, S-
dc.contributor.authorCosta, E-
dc.contributor.authordel Monte, E-
dc.contributor.authorDi Lalla, N-
dc.contributor.authorDi Marco, A-
dc.contributor.authorDonnarumma, I-
dc.contributor.authorDoroshenko, V-
dc.contributor.authorEnoto, T-
dc.contributor.authorEvangelista, Y-
dc.contributor.authorFabiani, S-
dc.contributor.authorFerrazzoli, R-
dc.contributor.authorGarcía, J A-
dc.contributor.authorGunji, S-
dc.contributor.authorHeyl, J-
dc.contributor.authorIwakiri, W-
dc.contributor.authorJorstad, S G-
dc.contributor.authorKaaret, P-
dc.contributor.authorKaras, V-
dc.contributor.authorKislat, F-
dc.contributor.authorKitaguchi, T-
dc.contributor.authorKolodziejczak, J J-
dc.contributor.authorla Monaca, F-
dc.contributor.authorLatronico, L-
dc.contributor.authorLiodakis, I-
dc.contributor.authorMaldera, S-
dc.contributor.authorManfreda, A-
dc.contributor.authorMarscher, A P-
dc.contributor.authorMitsuishi, I-
dc.contributor.authorMizuno, T-
dc.contributor.authorMuleri, F-
dc.contributor.authorNegro, M-
dc.contributor.authorNg, C-Y-
dc.contributor.authorO’Dell, S L-
dc.contributor.authorOmodei, N-
dc.contributor.authorOppedisano, C-
dc.contributor.authorPapitto, A-
dc.contributor.authorPavlov, G G-
dc.contributor.authorPeirson, A L-
dc.contributor.authorPerri, M-
dc.contributor.authorPesce-Rollins, M-
dc.contributor.authorPilia, M-
dc.contributor.authorPossenti, A-
dc.contributor.authorRamsey, B D-
dc.contributor.authorRankin, J-
dc.contributor.authorRoberts, O J-
dc.contributor.authorRomani, R W-
dc.contributor.authorSgrò, C-
dc.contributor.authorSlane, P-
dc.contributor.authorSpandre, G-
dc.contributor.authorSwartz, D A-
dc.contributor.authorTamagawa, T-
dc.contributor.authorTavecchio, F-
dc.contributor.authorTaverna, R-
dc.contributor.authorTawara, Y-
dc.contributor.authorTennant, A F-
dc.contributor.authorThomas, N E-
dc.contributor.authorTrois, A-
dc.contributor.authorTsygankov, S S-
dc.contributor.authorTurolla, R-
dc.contributor.authorVink, J-
dc.contributor.authorWeisskopf, M C-
dc.contributor.authorWu, K-
dc.contributor.authorXie, F-
dc.contributor.authorZane, S -
dc.date.accessioned2024-03-11T10:48:30Z-
dc.date.available2024-03-11T10:48:30Z-
dc.date.issued2023-09-11-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2023, v. 525, n. 4, p. 5437-5449-
dc.identifier.issn0035-8711-
dc.identifier.urihttp://hdl.handle.net/10722/340948-
dc.description.abstract<p>We present an X-ray spectro-polarimetric analysis of the bright Seyfert galaxy IC 4329A. The Imaging X-ray Polarimetry Explorer (IXPE) observed the source for -500 ks, supported by XMM-Newton ( -60 ks) and NuSTAR ( -80 ks) exposures. We detect polarization in the 2-8 keV band with 2.97 sigma confidence. We report a polarization degree of 3.3 +/- 1.1 per cent and a polarization angle of 78 degrees +/- 10 degrees (errors are 1 sigma confidence). The X-ray polarization is consistent with being aligned with the radio jet, albeit partially due to large uncertainties on the radio position angle. We jointly fit the spectra from the three observatories to constrain the presence of a relativistic reflection component. From this, we obtain constraints on the inclination angle to the inner disc ( < 39 degrees at 99 per cent confidence) and the disc inner radius ( < 11 gravitational radii at 99 per cent confidence), although we note that modelling systematics in practice add to the quoted statistical error. Our spectropolarimetric modelling indicates that the 2-8 keV polarization is consistent with being dominated by emission directly observed from the X-ray corona, but the polarization of the reflection component is completely unconstrained. Our constraints on viewer inclination and polarization degree tentatively fa v our more asymmetric, possibly out-flowing, coronal geometries that produce more highly polarized emission, but the coronal geometry is unconstrained at the 3 sigma level.</p>-
dc.languageeng-
dc.publisherOxford University Press-
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society-
dc.rightsThis work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.-
dc.subjectgalaxies: active-
dc.subjectgalaxies: individual: IC 4329A-
dc.subjectgalaxies: Seyfert-
dc.subjectpolarization-
dc.titleThe X-ray polarization of the Seyfert 1 galaxy IC 4329A-
dc.typeArticle-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1093/mnras/stad2625-
dc.identifier.scopuseid_2-s2.0-85173271012-
dc.identifier.volume525-
dc.identifier.issue4-
dc.identifier.spage5437-
dc.identifier.epage5449-
dc.identifier.eissn1365-2966-
dc.identifier.isiWOS:001085055000008-
dc.publisher.placeOXFORD-
dc.identifier.issnl0035-8711-

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