论文标题
银河凸起中狼射线二进制WR 102-1的长期X射线光谱变化：二进制中风失真的证据
Long Term X-Ray Spectral Variation of the Wolf-Rayet Binary WR 102-1 in the Galactic bulge: evidence for wind distortion in the binary
论文作者
论文摘要
在银河系中央区域的6.7 keV强度图中，苏扎库检测到WR〜102-1是一个显着的点源。根据其X射线和红外光谱特性，建议该来源作为可能的狼射线二进制。当碰撞同伴的轻度恒星风时，铁线排放量预计将起源于Wolf射线恒星的动态恒星风。在这里，我们报告了自1998年以来对WR〜102-1进行长期X射线监测的结果，使用ASCA，XMM-Newton，Chandra，Chandra，Sezaku和Swift的档案数据揭示了铁K发射线的变化和情节吸收。因此，我们发现了2003年3月的XMM-Newton观察结果和2006年9月的Suzaku观测的铁K发射线的显着红移。此外，当观察到红移时，这表明Wolf-rayet Star在同伴恒星的前面，与其他周期相比，伴侣的吸收值比其他周期更小。这些结果似乎与预期是否相反，如果狼射线的恒星风在球面上是对称的，但是如果由于狼射线的恒星风会严重扭曲，则可以理解，由于狼射线之恒星的恒星风会严重扭曲。
WR~102-1 was detected by Suzaku as a conspicuous point source in the 6.7 keV intensity map of the central region of the Milky Way. The source was suggested as a possible Wolf-Rayet binary based on its X-ray and infrared spectral characteristics. The iron line emission is expected to originate in the Wolf-Rayet star's dynamic stellar-wind when colliding the companion's mild stellar wind. Here, we report the result of a long-term X-ray monitoring of WR~102-1 since 1998 using archival data of ASCA, XMM-Newton, Chandra, Suzaku, and Swift to reveal variations of the iron K-emission line and the circumstellar absorption. Consequently, we have detected significant redshifts of the iron K-emission line from the XMM-Newton observation in March 2003 and the Suzaku observation in September 2006. Furthermore, when the red-shift was observed, which suggests that the Wolf-Rayet star was in front of the companion star, the circumstellar absorption values were smaller than other periods. These results appear contrary to the expectation if the Wolf-Rayet's stellar wind is spherically symmetric, but may be understood if the Wolf-Rayet star's stellar wind is significantly distorted due to the rapid orbital motion near the periastron.
