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dc.creatorLiebhart, Arminen_US
dc.creatorGudel, Manuelen_US
dc.creatorSkinner, Stephen L.en_US
dc.creatorGreen, Joelen_US
dc.date.accessioned2016-04-22T19:47:04Z
dc.date.available2016-04-22T19:47:04Z
dc.date.issued2014-10en
dc.identifierdoi:10.15781/T2JB74
dc.identifier.citationLiebhart, Armin, Manuel Güdel, Stephen L. Skinner, and Joel Green. >X-ray emission from an FU Orionis star in early outburst: HBC 722.> Astronomy & Astrophysics, Vol. 570 (Oct., 2014): L11.en_US
dc.identifier.issn0004-6361en_US
dc.identifier.urihttp://hdl.handle.net/2152/34474
dc.description.abstractAims. We conducted the first X-ray observations of the newly erupting FU Ori-type outburst in HBC 722 ( V2493 Cyg) with the aim to characterize its X-ray behavior and near-stellar environment during early outburst. Methods. We used data from the XMM-Newton and Chandra X-ray observatories to measure X-ray source temperatures and luminosities as well as the gas column densities along the line of sight toward the source. Results. We report a Chandra X-ray detection of HBC 722 with an X-ray luminosity of L-X approximate to 4 x 10(30) ergs s(-1). The gas column density exceeds values expected from optical extinction and standard gas-to-dust ratios. We conclude that dust-free gas masses are present around the star, such as strong winds launched from the inner disk, or massive accretion columns. A tentative detection obtained by XMM-Newton two years earlier after an initial optical peak revealed a fainter X-ray source with only weak absorption.en_US
dc.description.sponsorshipChandra award GO3-14012en_US
dc.description.sponsorshipNASA NAS8-03060en_US
dc.description.sponsorshipAustrian Science Fund (FWF)en_US
dc.language.isoEnglishen_US
dc.rightsAdministrative deposit of works to Texas ScholarWorks: This works author(s) is or was a University faculty member, student or staff member; this article is already available through open access or the publisher allows a PDF version of the article to be freely posted online. The library makes the deposit as a matter of fair use (for scholarly, educational, and research purposes), and to preserve the work and further secure public access to the works of the University.en_US
dc.subjectstars: individual: hbc 722en_US
dc.subjectstars: pre-main sequenceen_US
dc.subjectx-rays: starsen_US
dc.subjectt-tauri staren_US
dc.subjectxmm-newtonen_US
dc.subjectaccretionen_US
dc.subjectevolutionen_US
dc.subjectspectroscopyen_US
dc.subjectvariabilityen_US
dc.subjectcandidateen_US
dc.subjectbursten_US
dc.subjectastronomy & astrophysicsen_US
dc.titleX-Ray Emission From An FU Orionis Star In Early Outburst: HBC 722en_US
dc.typeArticleen_US
dc.description.departmentAstronomyen_US
dc.identifier.doi10.1051/0004-6361/201424841en_US
dc.contributor.utaustinauthorGreen, Joelen_US
dc.relation.ispartofserialAstronomy & Astrophysicsen_US


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