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dc.contributor.authorRahoui, F.
dc.contributor.authorBuxton, M.
dc.contributor.authorNeilsen, Joseph M. G.
dc.contributor.authorHoman, Jeroen
dc.date.accessioned2017-07-12T16:38:07Z
dc.date.available2017-07-12T16:38:07Z
dc.date.issued2016-04
dc.date.submitted2015-10
dc.identifier.issn1538-4357
dc.identifier.issn0004-637X
dc.identifier.urihttp://hdl.handle.net/1721.1/110677
dc.description.abstractDuring its 2005 outburst, GRO J1655–40 was observed at high spectral resolution with the Chandra High-Energy Transmission Grating Spectrometer, revealing a spectrum rich with blueshifted absorption lines indicative of an accretion disk wind—apparently too hot, too dense, and too close to the black hole to be driven by radiation pressure or thermal pressure (Miller et al.). However, this exotic wind represents just one piece of the puzzle in this outburst, as its presence coincides with an extremely soft and curved X-ray continuum spectrum, remarkable X-ray variability (Uttley & Klein-Wolt), and a bright, unexpected optical/infrared blackbody component that varies on the orbital period. Focusing on the X-ray continuum and the optical/infrared/UV spectral energy distribution, we argue that the unusual features of this "hypersoft state" are natural consequences of a super-Eddington Compton-thick wind from the disk: the optical/infrared blackbody represents the cool photosphere of a dense, extended outflow, while the X-ray emission is explained as Compton scattering by the relatively cool, optically thick wind. This wind obscures the intrinsic luminosity of the inner disk, which we suggest may have been at or above the Eddington limit.en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration (Grant HST-HF2-51343.001- A)en_US
dc.description.sponsorshipUnited States. National Aeronautics and Space Administration. Einstein Postdoctoral Fellowship Award (Grant PF2-130097)en_US
dc.language.isoen_US
dc.publisherIOP Publishingen_US
dc.relation.isversionofhttp://dx.doi.org/10.3847/0004-637X/822/1/20en_US
dc.rightsArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.en_US
dc.sourceIOP Publishingen_US
dc.titleA SUPER-EDDINGTON, COMPTON-THICK WIND IN GRO J1655–40?en_US
dc.typeArticleen_US
dc.identifier.citationNeilsen, J. et al. “A SUPER-EDDINGTON, COMPTON-THICK WIND IN GRO J1655–40?” The Astrophysical Journal 822.1 (2016): 20. © 2016 The American Astronomical Society.en_US
dc.contributor.departmentMIT Kavli Institute for Astrophysics and Space Researchen_US
dc.contributor.mitauthorNeilsen, Joseph M. G.
dc.contributor.mitauthorHoman, Jeroen
dc.relation.journalThe Astrophysical Journalen_US
dc.eprint.versionFinal published versionen_US
dc.type.urihttp://purl.org/eprint/type/JournalArticleen_US
eprint.statushttp://purl.org/eprint/status/PeerRevieweden_US
dspace.orderedauthorsNeilsen, J.; Rahoui, F.; Homan, J.; Buxton, M.en_US
dspace.embargo.termsNen_US
mit.licensePUBLISHER_POLICYen_US


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