%0 Journal Article
%T HESS J0632+057 : A new gamma-ray binary?
%+ Laboratoire de Physique Théorique et Astroparticules (LPTA)
%A Hinton, J. A.
%A Skilton, J. L.
%A Funk, S.
%A Brucker, J.
%A Aharonian, F. A.
%A Dubus, G.
%A Fiasson, Armand
%A Gallant, Yves
%A Hofmann, W.
%A Marcowith, Alexandre
%A Reimer, O.
%< avec comité de lecture
%Z 08-092
%@ 2041-8205
%J The Astrophysical journal letters
%I Bristol : IOP Publishing
%V 690
%P L101-L104
%8 2008-12-15
%D 2008
%Z 0809.0584
%R 10.1088/0004-637X/690/2/L101
%K X-rays: binaries
%Z Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]
%Z Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE]Journal articles
%X The High Energy Stereoscopic System (HESS) survey of the Galactic plane hasestablished the existence of a substantial number (~40) of Galactic TeVgamma-ray sources, a large fraction of which remain unidentified. HESSJ0632+057 is one of a small fraction of these objects which is point-like innature(<2' rms), and is one of only two point-like sources that remainunidentified. Follow-up observations of this object with XMM-Newton haverevealed an X-ray source coincident with the TeV source and with the massivestar 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 showssignificant variability on hour timescales. We discuss this spatial coincidenceand the implied spectral energy distribution of this object and argue that itis likely a new gamma-ray binary system with a close resemblance to the threeknown 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 establishHESS J0632+057 as a new member of this rare class of Galactic objects.
%G English
%L hal-00430148
%U https://hal.science/hal-00430148
%~ IN2P3
%~ LPTA
%~ CNRS
%~ UNIV-MONTP2
%~ UNIV-MONTPELLIER
%~ UM1-UM2