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dc.rights.license© ESO 2020-
dc.contributor.authorGiustini, M.-
dc.contributor.authorMiniutti, G.-
dc.contributor.authorSaxton, R. D.-
dc.contributor.otherUnidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737-
dc.date.accessioned2021-04-13T13:27:35Z-
dc.date.available2021-04-13T13:27:35Z-
dc.date.issued2020-04-09-
dc.identifier.citationAstronomy and Astrophysics 636: L2(2020)es
dc.identifier.issn0004-6361-
dc.identifier.otherhttps://www.aanda.org/articles/aa/full_html/2020/04/aa37610-20/aa37610-20.html-
dc.identifier.urihttp://hdl.handle.net/20.500.12666/304-
dc.description.abstractFollowing the recent discovery of X-ray quasi-periodic eruptions (QPEs) coming from the nucleus of the galaxy GSN 069, here we report on the detection of QPEs in the active galaxy named RX J1301.9+2747. QPEs are rapid and recurrent increases of the X-ray count-rate by more than one order of magnitude with respect to a stable quiescent level. During a XMM-Newton observation lasting 48 ks that was performed on 30 and 31 May 2019, three strong QPEs lasting about half an hour each were detected in the light curves of RX J1301.9+2747. The first two QPEs are separated by a longer recurrence time (about 20 ks) compared to the second and third (about 13 ks). This pattern is consistent with the alternating long-short recurrence times of the GSN 069 QPEs, although the difference between the consecutive recurrence times is significantly smaller in GSN 069. Longer X-ray observations will better clarify the temporal pattern of the QPEs in RX J1301.9+2747 and will allow a detailed comparison with GSN 069 to be performed. The X-ray spectral properties of QPEs in the two sources are remarkably similar, with QPEs representing fast transitions from a relatively cold and likely disk-dominated state to a state that is characterized by a warmer emission similar to the so-called soft X-ray excess, a component that is almost ubiquitously seen in the X-ray spectra of unobscured, radiatively efficient active galaxies. Previous X-ray observations of RX J1301.9+2747 in 2000 and 2009 strongly suggest that QPEs have been present for at least the past 18.5 yr. The detection of QPEs from a second galactic nucleus after GSN 069 rules out contamination by a Galactic source in both cases, such that QPEs ought to be considered a novel extragalactic phenomenon associated with accreting supermassive black holes.es
dc.description.sponsorshipWe thank the XMM-Newton Project Scientist N. Schartel for approving the DDT observation, and the XMM-Newton staff for performing it. We also thank the referee for useful comments and suggestions. MG is supported by the "Programa de Atraccion de Talento" of the Comunidad de Madrid, grant number 2018-T1/TIC-11733. GM is supported by the Spanish State Research Agency (AEI) Project No. ESP2017-86582-C4-1-R. This research has been partially funded by the AEI Project No. MDM-2017-0737 Unidad de Excelencia "Maria de Maeztu" - Centro de Astrobiologia (INTA-CSIC);With funding from the Spanish government through the "María de Maeztu Unit of Excellence" accreditation (MDM-2017-0737).es
dc.language.isoenges
dc.publisherEDP Scienceses
dc.relationinfo:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ESP2017-86582-C4-1-R/ES/CONTRIBUCION ESPAÑOLA A LAS MISIONES ESPACIALES CRIOGENICAS SPICA Y ATHENA, POST-OPERACIONES DE HERSCHEL Y EXPLOTACION CIENTIFICA MULTIFRECUENCIA/-
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectGalaxies: activees
dc.subjectGalaxies: nucleies
dc.subjectQuasars: generales
dc.subjectQuasars: supermassive black holeses
dc.subjectx rays: individuals: RX J1301.9+2747es
dc.titleX-ray quasi-periodic eruptions from the galactic nucleus of RX J1301.9+2747es
dc.typeinfo:eu-repo/semantics/articlees
dc.contributor.orcidGiustini, M. [0000-0002-1329-658X]-
dc.contributor.orcidMiniutti, G. [0000-0003-0707-4531]-
dc.identifier.doi10.1051/0004-6361/202037610-
dc.identifier.e-issn1432-0746-
dc.contributor.funderAgencia Estatal de Investigación (AEI)-
dc.contributor.funderComunidad de Madrid-
dc.description.peerreviewedPeer reviewes
dc.type.hasVersioninfo:eu-repo/semantics/publishedVersion-
dc.rights.accessRightsinfo:eu-repo/semantics/openAccess-
dc.type.coarhttp://purl.org/coar/resource_type/c_545b-
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