Chandra and HST Confirmation of the Luminous and Variable X-ray Source IC 10 X-1 as a Possible Wolf-Rayet, Black-Hole Binary
Chandra and HST Confirmation of the Luminous and Variable X-ray Source IC 10 X-1 as a Possible Wolf-Rayet, Black-Hole Binary
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Chandra 和 HST 确认发光可变 X 射线源 IC 10 X-1 可能是沃尔夫拉叶黑洞双星
DOI：
10.1086/380107
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
W. Brandt
中科院分区：
文献类型：
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作者：
F. Bauer;W. Brandt
我们提出了一个钱德拉和HST研究IC 10 X-1，最明亮的X射线双星在最近的星暴星系银河系。我们对X-1的新的硬X射线观测证实，它具有平均0.5-10 keV的光度为1.5e38 erg/s，是强可变的（>3 ks的因子约为2），并且是空间重合的（在0. 23 +/-0.沃尔夫-拉叶（WR）星星[MAC 92] 17 A在IC 10中。X-1的光谱与光子指数约为1.8的幂律和kT约为1.5 keV的热等离子体最佳拟合，尽管系统残差暗示了进一步的复杂性。综上所述，这些事实表明X-1可能是一个黑洞，属于罕见的WR双星;它在许多方面与天鹅座X-3相当。钱德拉的观测还发现了X射线辐射与X-1周围的大型非热射电超泡共空间的证据。
We present a Chandra and HST study of IC 10 X-1, the most luminous X-ray binary in the closest starburst galaxy to the Milky Way. Our new hard X-ray observation of X-1 confirms that it has an average 0.5-10 keV luminosity of 1.5e38 erg/s, is strongly variable (a factor of ~2 in>3 ks), and is spatially coincident (within 0.'23 +/-0.'30) with the Wolf-Rayet (WR) star [MAC92] 17A in IC 10. The spectrum of X-1 is best fit by a power law with photon index of ~1.8 and a thermal plasma with kT~1.5 keV, although systematic residuals hint at further complexity. Taken together, these facts suggest that X-1 may be a black hole belonging to the rare class of WR binaries; it is comparable in many ways to Cyg X-3. The Chandra observation also finds evidence for extended X-ray emission co-spatial with the large non-thermal radio superbubble surrounding X-1.