X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020)
We present a comprehensive analysis of all XMM–Newton spectra of OJ 287 spanning 15 yr of X-ray spectroscopy of this bright blazar. We also report the latest results from our dedicated Swift UVOT and XRT monitoring of OJ 287, which started in 2015, along with all earlier public Swift data since 2005...
| Autores: | , , , , , , , , , , , , , , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2021 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/251469 |
| Acceso en línea: | http://hdl.handle.net/10261/251469 |
| Access Level: | acceso abierto |
| Palabra clave: | Galaxies: active Galaxies: jets Galaxies: nuclei Quasars: individual: OJ 287 X-ray galaxies |
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| dc.title.none.fl_str_mv |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| title |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| spellingShingle |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) Komossa, S. Galaxies: active Galaxies: jets Galaxies: nuclei Quasars: individual: OJ 287 X-ray galaxies |
| title_short |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| title_full |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| title_fullStr |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| title_full_unstemmed |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| title_sort |
X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020) |
| dc.creator.none.fl_str_mv |
Komossa, S. Grupe, D. Parker, M. L. Gómez Fernández, José L. Valtonen, Mauri J. Nowak, M. A. Jorstad, Svetlana G. Haggard, D. Chandra, S. Ciprini, Stefano Dey, L. Gopakumar, Achamveedu Hada, Kazuhiro Markoff, S. Neilsen, J. |
| author |
Komossa, S. |
| author_facet |
Komossa, S. Grupe, D. Parker, M. L. Gómez Fernández, José L. Valtonen, Mauri J. Nowak, M. A. Jorstad, Svetlana G. Haggard, D. Chandra, S. Ciprini, Stefano Dey, L. Gopakumar, Achamveedu Hada, Kazuhiro Markoff, S. Neilsen, J. |
| author_role |
author |
| author2 |
Grupe, D. Parker, M. L. Gómez Fernández, José L. Valtonen, Mauri J. Nowak, M. A. Jorstad, Svetlana G. Haggard, D. Chandra, S. Ciprini, Stefano Dey, L. Gopakumar, Achamveedu Hada, Kazuhiro Markoff, S. Neilsen, J. |
| author2_role |
author author author author author author author author author author author author author author |
| dc.contributor.none.fl_str_mv |
Ministerio de Economía y Competitividad (España) Ministerio de Ciencia, Innovación y Universidades (España) European Commission Junta de Andalucía NASA Consejo Superior de Investigaciones Científicas (España) Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72] |
| dc.subject.none.fl_str_mv |
Galaxies: active Galaxies: jets Galaxies: nuclei Quasars: individual: OJ 287 X-ray galaxies |
| topic |
Galaxies: active Galaxies: jets Galaxies: nuclei Quasars: individual: OJ 287 X-ray galaxies |
| description |
We present a comprehensive analysis of all XMM–Newton spectra of OJ 287 spanning 15 yr of X-ray spectroscopy of this bright blazar. We also report the latest results from our dedicated Swift UVOT and XRT monitoring of OJ 287, which started in 2015, along with all earlier public Swift data since 2005. During this time interval, OJ 287 was caught in extreme minima and outburst states. Its X-ray spectrum is highly variable and encompasses all states seen in blazars from very flat to exceptionally steep. The spectrum can be decomposed into three spectral components: Inverse Compton (IC) emission dominant at low-state, supersoft synchrotron emission that becomes increasingly dominant as OJ 287 brightens, and an intermediately-soft (Γx = 2.2) additional component seen at outburst. This last component extends beyond 10 keV and plausibly represents either a second synchrotron/IC component and/or a temporary disc corona of the primary supermassive black hole (SMBH). Our 2018 XMM–Newton observation, quasi-simultaneous with the Event Horizon Telescope observation of OJ 287, is well described by a two-component model with a hard IC component of Γx = 1.5 and a soft synchrotron component. Low-state spectra limit any long-lived accretion disc/corona contribution in X-rays to a very low value of Lx/LEdd < 5.6 × 10−4 (for MBH, primary = 1.8 × 1010 M⊙). Some implications for the binary SMBH model of OJ 287 are discussed. © 2021 The Author(s). |
| publishDate |
2021 |
| dc.date.none.fl_str_mv |
2021 2021 2021 |
| dc.type.none.fl_str_mv |
info:eu-repo/semantics/article http://purl.org/coar/resource_type/c_6501 Publisher's version info:eu-repo/semantics/publishedVersion |
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article |
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publishedVersion |
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http://hdl.handle.net/10261/251469 |
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http://hdl.handle.net/10261/251469 |
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Inglés |
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Inglés |
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info:eu-repo/semantics/openAccess |
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openAccess |
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Oxford University Press |
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Oxford University Press |
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reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC instname:Consejo Superior de Investigaciones Científicas (CSIC) |
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X-ray spectral components of the blazar and binary black hole candidate OJ 287 (2005-2020)Komossa, S.Grupe, D.Parker, M. L.Gómez Fernández, José L.Valtonen, Mauri J.Nowak, M. A.Jorstad, Svetlana G.Haggard, D.Chandra, S.Ciprini, StefanoDey, L.Gopakumar, AchamveeduHada, KazuhiroMarkoff, S.Neilsen, J.Galaxies: activeGalaxies: jetsGalaxies: nucleiQuasars: individual: OJ 287X-ray galaxiesWe present a comprehensive analysis of all XMM–Newton spectra of OJ 287 spanning 15 yr of X-ray spectroscopy of this bright blazar. We also report the latest results from our dedicated Swift UVOT and XRT monitoring of OJ 287, which started in 2015, along with all earlier public Swift data since 2005. During this time interval, OJ 287 was caught in extreme minima and outburst states. Its X-ray spectrum is highly variable and encompasses all states seen in blazars from very flat to exceptionally steep. The spectrum can be decomposed into three spectral components: Inverse Compton (IC) emission dominant at low-state, supersoft synchrotron emission that becomes increasingly dominant as OJ 287 brightens, and an intermediately-soft (Γx = 2.2) additional component seen at outburst. This last component extends beyond 10 keV and plausibly represents either a second synchrotron/IC component and/or a temporary disc corona of the primary supermassive black hole (SMBH). Our 2018 XMM–Newton observation, quasi-simultaneous with the Event Horizon Telescope observation of OJ 287, is well described by a two-component model with a hard IC component of Γx = 1.5 and a soft synchrotron component. Low-state spectra limit any long-lived accretion disc/corona contribution in X-rays to a very low value of Lx/LEdd < 5.6 × 10−4 (for MBH, primary = 1.8 × 1010 M⊙). Some implications for the binary SMBH model of OJ 287 are discussed. © 2021 The Author(s).We would like to thank the Swift and XMM–Newton teams for carrying out our observations and our anonymous referee for their useful comments and suggestions. JLG acknowledges financial support from the Spanish Ministerio de Economía y Competitividad (grants AYA2016-80889-P, PID2019-108995GB-C21), the Consejería de Economía, Conocimiento, Empresas y Universidad of the Junta de Andalucía (grant P18-FR-1769), the Consejo Superior de Investigaciones Científicas (grant 2019AEP112), and the State Agency for Research of the Spanish MCIU through the Center of Excellence Severo Ochoa award for the Instituto de Astrofísica de Andalucía (SEV-2017-0709). SGJ acknowledges financial support from NASA Fermi GI grants 80NSSC20K1565 and 80NSSC20K1566. DH acknowledges funding from the Natural Sciences and Engineering Research Council of Canada (NSERC) and the Canada Research Chairs (CRC) program. We acknowledge the use of data we have obtained with the Neil Gehrels Swift mission. We also acknowledge the use of public data from the Swift data archive. This work made use of data supplied by the UK Swift Science Data Centre at the University of Leicester. This research is partly based on observations obtained with XMM–Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and NASA. This research has made use of the XRT Data Analysis Software (XRTDAS) developed under the responsibility of the ASI Space Science Data Center (SSDC), Italy.Peer reviewedOxford University PressMinisterio de Economía y Competitividad (España)Ministerio de Ciencia, Innovación y Universidades (España)European CommissionJunta de AndalucíaNASAConsejo Superior de Investigaciones Científicas (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202120212021info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/251469reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE##PLACEHOLDER_PARENT_METADATA_VALUE#info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/AYA2016-80889-Pinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-108995GB-C21info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/SEV-2017-0709http://dx.doi.org/10.1093/mnras/stab1223Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2514692026-05-22T06:33:51Z |
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