4U 1907+09: a HMXB running away from the Galactic plane
4U 1907+09: a HMXB running away from the Galactic plane
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4U 1907 09：一架逃离银河平面的 HMXB
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
E. Schilbach
中科院分区：
文献类型：
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作者：
V. Gvaramadze;S. Röser;Ralf;E. Schilbach
我们报告了使用斯皮策太空望远镜 24 $mu$m 数据在高质量 X 射线双星 (HMXB) 4U 1907+09 周围发现的弓形激波（继 Vela X-1 之后，与 HMXB 相关的弓形激波的第二个例子）。弓形激波的检测意味着 4U 1907+09 正在以高（超音速）特有速度穿过空间。为了确认 4U 1907+09 的失控性质，我们测量了它的自行，对于 4 kpc 的采用距离，对应于 $simeq 160 pm 115$ km/s 的特殊横向速度，这意味着 4U 1907+09 确实是一个失控系统，并支持了大多数 HMXB 具有高空速的普遍观点。自行测量推断出的4U 1907+09的运动方向与弓激波对称轴方向一致，表明HMXB正在远离银道面。我们还展示了 Vela X-1（类似于 4U 1907+09 的系统）周围的弓激波的斯皮策图像，并将其与 4U 1907+09 产生的弓激波进行比较。
We report the discovery of a bow shock around the high-mass X-ray binary (HMXB) 4U 1907+09 using the Spitzer Space Telescope 24 $mu$m data (after Vela X-1 the second example of bow shocks associated with HMXBs). The detection of the bow shock implies that 4U 1907+09 is moving through the space with a high (supersonic) peculiar velocity. To confirm the runaway nature of 4U 1907+09, we measured its proper motion, which for an adopted distance to the system of 4 kpc corresponds to a peculiar transverse velocity of $simeq 160 pm 115$ km/s, meaning that 4U 1907+09 is indeed a runaway system and supporting the general belief that most of HMXBs possess high space velocities. The direction of motion of 4U 1907+09 inferred from the proper motion measurement is consistent with the orientation of the symmetry axis of the bow shock, and shows that the HMXB is running away from the Galactic plane. We also present the Spitzer images of the bow shock around Vela X-1 (a system similar to 4U 1907+09) and compare it with the bow shock generated by 4U 1907+09.