论文标题
MRK 78中的终止冲击和扩展的X射线排放
Termination Shocks and the Extended X-ray Emission in MRK 78
论文作者
论文摘要
与Chandra的2型AGN MRK 78中X射线发射的子弧形成像显示复杂的结构，尺度从$ \ sim $ 200 pc到$ \ sim $ 2 kpc，尺度上的频谱变化。总体而言，将X射线发射与[OIII]映射的无线电（3.6 cm）和窄发射线区域对齐，并具有明显的E-W不对称性。东部X射线发射主要与无线电源偏转的位置相吻合，而西部X射线发射从nucleus中形成一个环或壳$ \ sim $ \ sim $ 2 kpc，radius $ \ sim $ 0.7 kpc。有暗示性的证据表明，东部结和西部弧线都有冲击。这两个位置都与[OIII]流出的速度发生巨大变化一致。我们讨论了为什么西侧X射线冲击发生的原因可能是$ \ sim1 $ kpc远远超过东侧。我们估计，冲击注入星际介质的热能对应于$ 0.05-0.6 $％的AGN辐射光度亮度。
Sub-arcsecond imaging of the X-ray emission in the type 2 AGN Mrk 78 with Chandra shows complex structure with spectral variations on scales from $\sim$200 pc to $\sim$ 2 kpc. Overall the X-ray emission is aligned E-W with the radio (3.6 cm) and narrow emission line region as mapped in [OIII], with a marked E-W asymmetry. The Eastern X-ray emission is mostly in a compact knot coincident with the location where the radio source is deflected, while the Western X-ray emission forms a loop or shell $\sim$2 kpc from the nucleus with radius $\sim$0.7 kpc. There is suggestive evidence of shocks in both the Eastern knot and the Western arc. Both these positions coincide with large changes in the velocities of the [OIII] outflow. We discuss possible reasons why the X-ray shocks on the Western side occur $\sim1$ kpc farther out than on the Eastern side. We estimate that the thermal energy injected by the shocks into the interstellar medium corresponds to $0.05-0.6$% of the AGN bolometric luminosity.
