Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-09-03
Astrophys.J.Lett.690:L101-L104,2009
Astronomy and Astrophysics
Astrophysics
5 pages, 4 figures, accepted without corrections, small changes at proof stage
Scientific paper
10.1088/0004-637X/690/2/L101
The 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.
Aharonian Felix A.
Brucker J.
Dubus Guillaume
Fiasson Armand
Funk Stefan
No associations
LandOfFree
HESS J0632+057 : A new gamma-ray binary? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with HESS J0632+057 : A new gamma-ray binary?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HESS J0632+057 : A new gamma-ray binary? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-104397