Rapid variability of the arcsec-scale X-ray jets of SS 433
Rapid variability of the arcsec-scale X-ray jets of SS 433
复制标题
SS 433 弧秒级 X 射线射流的快速变化
DOI：
--
复制
发表时间：
2004
期刊：
影响因子：
--
通讯作者：
M. Klis
中科院分区：
文献类型：
--
作者：
S. Migliari;R. Fender;K. Blundell;M. Méndez;M. Klis
我们展示了所有可用的钱德拉观测到的星系喷射源SS 433的x射线图像。我们研究了x射线图像的形态，并检查了弧型x射线喷流的演变，最近发现喷流下游的相对论性气体在原位再加热的表现。钱德拉的图像显示，弧弧x射线射流不是稳定的长期结构；结构的变化表明，再加热过程对特定的进动相或距离双星核的距离没有偏好。2001年5月在大约5天内进行的3次观测，以及2003年7月进行的60秒内的观测，表明喷流的变化可以非常迅速，从天到（可能）小时的时间尺度。2001年5月拍摄的三张图像显示，东部急流中的两个已分解的旋结一个接一个地变亮，这表明一个共同的现象可能是旋结连续重新加热的起源。我们讨论了可能的情况，并提出了一个模型，以传播冲击波的方式解释这些变亮，揭示了射流中第二种更快的流出。
We present X-ray images of all the available Chandra observations of the galactic jet source SS 433. We have studied the morphology of the X-ray images and inspected the evolution of the arcsec X-ray jets, recently found to be manifestations of in situ reheating of the relativistic gas downstream in the jets. The Chandra images reveal that the arcsec X-ray jets are not steady long-term structures; the structure varies, indicating that the reheating processes have no preference for a particular precession phase or distance from the binary core. Three observations made within about five days in 2001 May, and a 60-ks observation made in 2003 July, show that the variability of the jets can be very rapid, from time-scales of days to (possibly) hours. The three 2001 May images show two resolved knots in the east jet getting brighter one after the other, suggesting that a common phenomenon might be at the origin of the sequential reheatings of the knots. We discuss possible scenarios and propose a model to interpret these brightenings in terms of a propagating shock wave, revealing a second, faster outflow in the jet.