Measurement of the X-ray proper motion in the south-east rim of RX J1713.7-3946
Measurement of the X-ray proper motion in the south-east rim of RX J1713.7-3946
复制标题
RX J1713.7-3946东南缘X射线自行测量
DOI：
10.1051/0004-6361/201629618
复制
发表时间：
2017
影响因子：
6.5
通讯作者：
Robert
中科院分区：
文献类型：
--
作者：
Acero;Fabio; Katsuda;Satoru; Ballet;Jean; Petre;Robert
我们报道了用XMM-牛顿X射线望远镜对超新星遗迹RX J1713.7−3946进行的第一次自行测量，时间间隔为13年。这次膨胀测量是在残骸的东南部地区进行的，在那里观察到了两个尖锐的细丝结构。对于最外层的暗条，其自行为0.75±0.05-0.06±0.069systarcsec yr-1，相当于在1kpc的距离下激波速度约为3500公里 S-1。与激波与空穴边缘相互作用的明亮的西北部地区相比，东南部地区的激波很可能是在原始环境介质中扩张的，可以用来计算激波时的电流密度和残余物的年龄。在激波沿风廓线(ρ∝r−S，S=2)或均匀介质(S=0)演化的情况下，抛射指数n=9的年龄分别为~2300年和~1800年。抛射指数n=7，AND=0的具体情况给出了~1500年的年龄，这将使RX J1713.7−3946与SN 393的历史记录相一致。在所有情况下，我们都得到了类似的上游密度约为0.01厘米-3，这与受到冲击的环境介质中缺乏热X射线是相容的。
We report on the first proper motion measurement in the supernova remnant RX J1713.7−3946 using theXMM-NewtonX-ray telescope on a 13 yr time interval. This expansion measurement is carried out in the south-east region of the remnant, where two sharp filament structures are observed. For the outermost filament, the proper motion is 0.75+0.05-0.06± 0.069systarcsec yr-1which is equivalent to a shock speed of ~3500 km s-1at a distance of 1 kpc. In contrast with the bright north-west region, where the shock is interacting with the border of the cavity, the shock in the south-east region is probably expanding in the original ambient medium carved by the progenitor and can be used to derive the current density at the shock and the age of the remnant. In the case where the shock is evolving in a wind profile (ρ∝r−s,s= 2) or in a uniform medium (s= 0), we estimate an age of ~2300 yr and ~1800 yr respectively for an ejecta power-law index ofn= 9. The specific case of an ejecta power-law index ofn= 7, ands= 0, yields an age of ~1500 yr, which would reconcile RX J1713.7−3946 with the historical records of SN 393. In all scenarios, we derive similar upstream densities of the order of 0.01 cm-3, compatible with the lack of thermal X-rays from the shocked ambient medium.
非辐射超新星遗迹中的激波演化
影响因子：
4.8
作者：
Xiaping Tang;R. Chevalier
通讯作者：
R. Chevalier