HESS J0632+057: A NEW GAMMA-RAY BINARY?
Hinton JA, Skilton JL, Funk S, Brucker J, Aharonian FA, Dubus G, Fiasson A, Gallant Y, Hofmann W, Marcowith A, Reimer O (2009)
Publication Type: Journal article
Publication year: 2009
Journal
Book Volume: 690
Pages Range: L101-L104
Journal Issue: 2
DOI: 10.1088/0004-637X/690/2/L101
Abstract
The High Energy Stereoscopic System (HESS) survey of the Galactic plane has established the existence of a substantial number (similar to 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.
Authors with CRIS profile
Involved external institutions
Université Joseph Fourier (UJF Grenoble 1)
France (FR)
University of Montpellier / Université Montpellier
France (FR)
Dublin Institute for Advanced Studies (DIAS)
Ireland (IE)
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
University of Leeds
United Kingdom (GB)
Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics
Germany (DE)
France (FR)
University of Montpellier / Université Montpellier
France (FR)
Dublin Institute for Advanced Studies (DIAS)
Ireland (IE)
Stanford National Accelerator Laboratory (SLAC)
United States (USA) (US)
University of Leeds
United Kingdom (GB)
Max-Planck-Institut für Kernphysik (MPIK) / Max Planck Institute for Nuclear Physics
Germany (DE)
How to cite
APA:
Hinton, J.A., Skilton, J.L., Funk, S., Brucker, J., Aharonian, F.A., Dubus, G.,... Reimer, O. (2009). HESS J0632+057: A NEW GAMMA-RAY BINARY? Astrophysical Journal Letters, 690(2), L101-L104. https://doi.org/10.1088/0004-637X/690/2/L101
MLA:
Hinton, J. A., et al. "HESS J0632+057: A NEW GAMMA-RAY BINARY?" Astrophysical Journal Letters 690.2 (2009): L101-L104.
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