HESS J0632+057 : A new gamma-ray binary?

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dc.creatorHinton, J. A.
dc.creatorSkilton, J. L.
dc.creatorFunk, S.
dc.creatorBrucker, J.
dc.creatorAharonian, F. A.
dc.creatorDubus, G.
dc.creatorFiasson, A.
dc.creatorGallant, Y.
dc.creatorHofmann, W.
dc.creatorMarcowith, A.
dc.creatorReimer, O.
dc.date2008-09-03
dc.date2008-12-18
dc.date.accessioned2026-07-07T12:15:28Z
dc.date.available2026-07-07T12:15:28Z
dc.descriptionThe High Energy Stereoscopic System (HESS) survey of the Galactic plane has established the existence of a substantial number (~40) of Galactic TeV gamma-ray sources, a large fraction of which remain unidentified. HESS J0632+057 is one of a small fraction of these objects which is point-like in nature(<2' rms), and is one of only two point-like sources that remain unidentified. Follow-up observations of this object with XMM-Newton have revealed an X-ray source coincident with the TeV source and with the massive star MWC 148, of the spectral type B0pe. This source exhibits a hard spectrum, consistent with an absorbed power law with Gamma = 1.26 +/- 0.04, and shows significant variability on hour timescales. We discuss this spatial coincidence and the implied spectral energy distribution of this object and argue that it is likely a new gamma-ray binary system with a close resemblance to the three known members of this class, and in particular to LS I +61 303. Further X-ray, radio and optical observations of this system are needed to firmly establish HESS J0632+057 as a new member of this rare class of Galactic objects.
dc.description5 pages, 4 figures, accepted without corrections, small changes at proof stage
dc.identifierhttps://arxiv.org/abs/0809.0584
dc.identifierhttp://arxiv.org/abs/0809.0584
dc.identifierAstrophys.J.Lett.690:L101-L104,2009
dc.identifierdoi:10.1088/0004-637X/690/2/L101
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211504
dc.subjectAstrophysics
dc.titleHESS J0632+057 : A new gamma-ray binary?
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