A NEW TeV BINARY: THE DISCOVERY OF AN ORBITAL PERIOD IN HESS J0632+057
A NEW TeV BINARY: THE DISCOVERY OF AN ORBITAL PERIOD IN HESS J0632+057
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DOI：
10.1088/2041-8205/737/1/l11
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
S. Bongiorno;A. Falcone;M. Stroh;J. Holder;J. Skilton;J. Hinton;N. Gehrels;J. Grube
中科院分区：
文献类型：
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作者：
S. Bongiorno;A. Falcone;M. Stroh;J. Holder;J. Skilton;J. Hinton;N. Gehrels;J. Grube
赫斯J0632+057是位于银河系平面的一种可变的、点状的极高能量(>；100GeV)伽马射线源。它在位置上与Be星重合，它是一个可变的射电和X射线源，具有硬X射线谱，并且射电通量很低。这些性质表明，该天体可能是罕见的TeV/X射线双星系统的成员。对这一点的最终确认将是在任何波长探测到通量的周期性轨道调制。我们已经获得了MJD 54857至55647(2009年1月至2011年3月)期间的SWIFT X射线望远镜观测，以验证Hess J0632+057是X射线/TeV双星的假设。我们发现这些数据表现出321±5天的磁通调制周期，我们通过计算零假设概率来评估这个周期的重要性，并考虑到随机耀斑。这种周期性确立了Hess J0632+057的二进制性质。
HESS J0632+057 is a variable, point-like source of very high energy (>100 GeV) gamma rays located in the Galactic plane. It is positionally coincident with a Be star, it is a variable radio and X-ray source, has a hard X-ray spectrum, and has low radio flux. These properties suggest that the object may be a member of the rare class of TeV/X-ray binary systems. The definitive confirmation of this would be the detection of a periodic orbital modulation of the flux at any wavelength. We have obtained Swift X-Ray Telescope observations of the source from MJD 54857 to 55647 (2009 January–2011 March) to test the hypothesis that HESS J0632+057 is an X-ray/TeV binary. We show that these data exhibit flux modulation with a period of 321 ± 5 days and we evaluate the significance of this period by calculating the null hypothesis probability, allowing for stochastic flaring. This periodicity establishes the binary nature of HESS J0632+057.