Extended X-ray emission in the IC 2497-Hanny's Voorwerp system: energy injection in the gas around a fading AGN

dc.contributor.authorSartori, Lia F.
dc.contributor.authorSchawinski, Kevin
dc.contributor.authorKoss, Michael
dc.contributor.authorTreister, Ezequiel
dc.contributor.authorMaksym, W. Peter
dc.contributor.authorKeel, William C.
dc.contributor.authorUrry, C. Megan
dc.contributor.authorLintott, Chris J.
dc.contributor.authorWong, O. Ivy
dc.contributor.otherSwiss Federal Institutes of Technology Domain
dc.contributor.otherETH Zurich
dc.contributor.otherUniversidad de Concepcion
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Astrophysical Observatory
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherYale University
dc.contributor.otherUniversity of Oxford
dc.contributor.otherUniversity of Western Australia
dc.date.accessioned2018-09-20T21:03:03Z
dc.date.available2018-09-20T21:03:03Z
dc.date.issued2016-01-29
dc.description.abstractWe present deep Chandra X-ray observations of the core of IC 2497, the galaxy associated with Hanny's Voorwerp and hosting a fading AGN. We find extended soft X-ray emission from hot gas around the low intrinsic luminosity (unobscured) AGN (L-bol similar to 10(42)-10(44) erg s(-1)). The temperature structure in the hot gas suggests the presence of a bubble or cavity around the fading AGN (E-bub similar to 10(54)-10(55) erg). A possible scenario is that this bubble is inflated by the fading AGN, which after changing accretion state is now in a kinetic mode. Other possibilities are that the bubble has been inflated by the past luminous quasar (L-bol similar to 10(46) erg s(-1)), or that the temperature gradient is an indication of a shock front from a superwind driven by the AGN. We discuss the possible scenarios and the implications for the AGN-host galaxy interaction, as well as an analogy between AGN and X-ray binaries lifecycles. We conclude that the AGN could inject mechanical energy into the host galaxy at the end of its lifecycle, and thus provide a source for mechanical feedback, in a similar way as observed for X-ray binaries.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationSartori, L. et al. (2016): Extended X-ray emission in the IC 2497 – Hanny's Voorwerp system: energy injection in the gas around a fading AGN. Monthly Notices of the Royal Astronomical Society, 457(4). DOI: https://doi.org/10.1093/mnras/stw230
dc.identifier.doi10.1093/mnras/stw230
dc.identifier.orcidhttps://orcid.org/0000-0003-4264-3509
dc.identifier.orcidhttps://orcid.org/0000-0001-5464-0888
dc.identifier.orcidhttps://orcid.org/0000-0001-8020-3884
dc.identifier.orcidhttps://orcid.org/0000-0002-2203-7889
dc.identifier.orcidhttps://orcid.org/0000-0001-7568-6412
dc.identifier.orcidhttps://orcid.org/0000-0002-0745-9792
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3920
dc.languageEnglish
dc.language.isoen_US
dc.publisherOxford University Press
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectgalaxies: active
dc.subjectquasars: general
dc.subjectquasars: individual: IC 2497
dc.subjectX-rays: galaxies
dc.subjectACTIVE GALACTIC NUCLEI
dc.subjectACCRETING BLACK-HOLES
dc.subjectHANNYS VOORWERP
dc.subjectGALAXY ZOO
dc.subjectDOMINATED ACCRETION
dc.subjectBINARIES
dc.subjectQUASAR
dc.subjectEVENTS
dc.subjectGROWTH
dc.subjectSTARBURSTS
dc.subjectAstronomy & Astrophysics
dc.titleExtended X-ray emission in the IC 2497-Hanny's Voorwerp system: energy injection in the gas around a fading AGNen_US
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dc.typeArticle
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