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A likely decade-long sustained tidal disruption event

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dc.contributor.authorLin, Dacheng
dc.contributor.authorGuillochon, James
dc.contributor.authorKomossa, S.
dc.contributor.authorRamirez-Ruiz, Enrico
dc.contributor.authorIrwin, Jimmy A.
dc.contributor.authorMaksym, W. Peter
dc.contributor.authorGrupe, Dirk
dc.contributor.authorGodet, Olivier
dc.contributor.authorWebb, Natalie A.
dc.contributor.authorBarret, Didier
dc.contributor.authorZauderer, B. Ashley
dc.contributor.authorDuc, Pierre-Alain
dc.contributor.authorCarrasco, Eleazar R.
dc.contributor.authorGwyn, Stephen D. J.
dc.contributor.otherUniversity System Of New Hampshire
dc.contributor.otherUniversity of New Hampshire
dc.contributor.otherHarvard University
dc.contributor.otherSmithsonian Astrophysical Observatory
dc.contributor.otherSmithsonian Institution
dc.contributor.otherUniversity of California System
dc.contributor.otherUniversity of California Santa Cruz
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherSeoul National University (SNU)
dc.contributor.otherMorehead State University
dc.contributor.otherCentre National de la Recherche Scientifique (CNRS)
dc.contributor.otherUniversite de Toulouse
dc.contributor.otherUniversite Toulouse III - Paul Sabatier
dc.contributor.otherNew York University
dc.contributor.otherCEA
dc.contributor.otherUDICE-French Research Universities
dc.contributor.otherUniversite Paris Cite
dc.contributor.otherUniversite Paris Saclay
dc.contributor.otherNational Research Council Canada
dc.date.accessioned2018-12-05T21:14:33Z
dc.date.available2018-12-05T21:14:33Z
dc.date.issued2017-02-02
dc.description.abstractMultiwavelength flares from tidal disruption and accretion of stars can be used to find and study otherwise dormant massive black holes in galactic nuclei(1). Previous well-monitored candidate flares were short-lived, with most emission confined to within similar to 1 year(2-5). Here we report the discovery of a well-observed super-long (> 11 years) luminous X-ray flare from the nuclear region of a dwarf starburst galaxy. After an apparently fast rise within similar to 4 months a decade ago, the X-ray luminosity, though showing a weak trend of decay, has been persistently high at around the Eddington limit (when the radiation pressure balances the gravitational force). The X-ray spectra are soft - steeply declining towards higher energies and can be described with Comptonized emission from an optically thick low-temperature corona, a super-Eddington accretion signature often observed in accreting stellar-mass black holes(6). Dramatic spectral softening was also caught in one recent observation, implying either a temporary transition from the super-Eddington accretion state to the standard thermal state, or the presence of a transient highly blueshifted (similar to 0.36c) warm absorber. All these properties in concert suggest a tidal disruption event with an unusually long super-Eddington accretion phase that has never before been observed.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationLin, D. et al. (2017): A Likely Decade-Long Sustained Tidal Disruption Event. Nature Astronomy, 1 (2). DOI: 10.1038/s41550-016-0033
dc.identifier.doi10.1038/s41550-016-0033
dc.identifier.orcidhttps://orcid.org/0000-0002-9809-8215
dc.identifier.orcidhttps://orcid.org/0000-0001-5683-5339
dc.identifier.orcidhttps://orcid.org/0000-0003-2558-3102
dc.identifier.orcidhttps://orcid.org/0000-0002-0393-9190
dc.identifier.orcidhttps://orcid.org/0000-0002-2203-7889
dc.identifier.orcidhttps://orcid.org/0000-0002-7272-9234
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5149
dc.languageEnglish
dc.language.isoen_US
dc.publisherNature Portfolio
dc.subjectGROUP NGC 5813
dc.subjectBLACK-HOLES
dc.subjectSOURCE CATALOG
dc.subjectGALACTIC NUCLEI
dc.subjectSTELLAR-MASS
dc.subjectDATA RELEASE
dc.subjectXMM-NEWTON
dc.subjectFLARE
dc.subjectFEEDBACK
dc.subjectSTARS
dc.subjectAstronomy & Astrophysics
dc.titleA likely decade-long sustained tidal disruption eventen_US
dc.typetext
dc.typeArticle

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