Keck infrared observations of GRO J0422+32 in quiescence

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dc.contributor.authorReynolds, Mark T.
dc.contributor.authorCallanan, Paul J.
dc.contributor.authorFilippenko, Alexei V.
dc.contributor.funderNational Science Foundation
dc.contributor.funderScience Foundation Ireland
dc.date.accessioned2017-11-07T09:38:57Z
dc.date.available2017-11-07T09:38:57Z
dc.date.issued2007
dc.description.abstractWe present Keck K-band photometry and low-resolution H- and K-band spectroscopy of the X-ray nova GRO J0422+32 obtained while the system was in the quiescent state. No clear ellipsoidal modulation is present in the light curve, which is instead dominated by a strong flickering component. In the K band, we observe strong Br gamma emission, with an equivalent width of 38 +/- 5 angstrom. From this, we conclude that the accretion disc is the most likely source of the observed photometric contamination, and that previous infrared-based attempts to constrain the mass of the putative black hole in this system are prone to considerable uncertainty. We finally proceed to show how it is possible to place meaningful constraints on some of the binary parameters of this system, even in the presence of a relatively high level of contamination from the disc.en
dc.description.sponsorshipNational Science Foundation (AST-0307894)
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationReynolds, M. T., Callanan, P. J. and Filippenko, A. V. (2007) 'Keck infrared observations of GRO J0422+32 in quiescence', Monthly Notices of the Royal Astronomical Society, 374(2), pp. 657-663. doi: 10.1111/j.1365-2966.2006.11180.xen
dc.identifier.doi10.1111/j.1365-2966.2006.11180.x
dc.identifier.endpage663
dc.identifier.issn0035-8711
dc.identifier.issued2
dc.identifier.journaltitleMonthly Notices of the Royal Astronomical Societyen
dc.identifier.startpage657
dc.identifier.urihttps://hdl.handle.net/10468/4981
dc.identifier.volume374
dc.language.isoenen
dc.publisherOxford University Pressen
dc.relation.urihttps://academic.oup.com/mnras/article-lookup/doi/10.1111/j.1365-2966.2006.11180.x
dc.rights© 2006, the Authors. Journal compilation © 2006, RASen
dc.subjectStarsen
dc.subjectIndividualen
dc.subjectGRO J0422+32en
dc.subjectX-raysen
dc.subjectBinariesen
dc.titleKeck infrared observations of GRO J0422+32 in quiescenceen
dc.typeArticle (peer-reviewed)en
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