The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet

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dc.contributor.author Stelzer, Beate
dc.contributor.author Hubrig, Swetlana
dc.contributor.author Orlando, Salvatore
dc.contributor.author Micela, Giusi
dc.contributor.author Mikulášek, Zdeněk
dc.contributor.author Schöller, Marcus
dc.date.accessioned 2009-07-03T10:34:55Z
dc.date.available 2009-07-03T10:34:55Z
dc.date.issued 2009
dc.identifier.citation Astronomy & astrophysics. 2009, vol. 499, no. 2, p. 529-533. en
dc.identifier.issn 0004-6361
dc.identifier.issn 1432-0746
dc.identifier.uri http://hdl.handle.net/10084/71333
dc.description.abstract Accretion shocks have been recognized as an important X-ray emission mechanism for pre-main sequence stars, and yet the X-ray properties of FUor outbursts, events that are caused by violent accretion, have been given little attention. We observed the FUor object Z CMa during optical outburst and quiescence with Chandra. No significant changes in X-ray brightness and spectral shape were found, suggesting that the X-ray emission is coronal. The binary nature of Z CMa makes the origin of the X-ray source ambiguous. However, the moderate hydrogen column density derived from our data makes it unlikely that the embedded primary star is the X-ray source. The secondary star, which is the FUor object, is thus responsible for both the X-ray emission and the ongoing accretion outburst, which seem, however, to be unrelated phenomena. The secondary is also known to drive a large outflow and jet, which we detect here for the first time in X-rays. The distance of the X-ray emitting outflow source to the central star is greater than in jets of low-mass stars. en
dc.language.iso en en
dc.publisher EDP Sciences en
dc.relation.ispartofseries Astronomy & astrophysics en
dc.relation.uri http://dx.doi.org/10.1051/0004-6361/200911750 en
dc.subject X-rays: stars en
dc.subject accretion en
dc.subject accretion disks en
dc.subject stars: pre-main sequence en
dc.subject stars: variables: general en
dc.subject stars: activity en
dc.subject stars: winds en
dc.subject outflows en
dc.title The X-ray emission from Z Canis Majoris during an FUor-like outburst and the detection of its X-ray jet en
dc.type article en
dc.identifier.location Není ve fondu ÚK en
dc.identifier.doi 10.1051/0004-6361/200911750
dc.identifier.wos 000266730500017

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