Evidence for Jet Collimation in SS 433 with the Chandra HETGS
Evidence for Jet Collimation in SS 433 with the Chandra HETGS
复制标题
SS 433 中使用 Chandra HETGS 进行射流准直的证据
DOI：
10.1093/pasj/55.1.281
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
K. Makishima
中科院分区：
文献类型：
--
作者：
M. Namiki;N. Kawai;T. Kotani;K. Makishima
利用钱德拉高能透射光栅谱仪（HETGS）对SS 433在反食、食中和双星出射后的高分辨X射线谱进行了研究。探测到许多来自高度电离元素的多普勒频移X射线发射线。所有的多普勒频移发射谱线被发现比仪器分辨率更宽。无论是测得的线宽，也不是它们对原子序数的依赖关系，可以解释单独的热加宽。讨论了观察到的线宽的替代解释，特别是包括沿其轴沿着的渐进射流准直。
High-resolution X-ray spectra of SS 433 obtained at an anti-eclipse, during an eclipse, and after a binary egress with the Chandra High Energy Transmission Grating Spectrometer (HETGS) were studied. Many Doppler-shifted X-ray emission lines from highly ionized elements were detected. All of the Doppler- shifted emission lines are found to be broader than the instrumented resolution. Neither the measured line widths nor their dependence on the atomic number can be explained by thermal broadening alone. Alternative explanations of the observed line widths are discussed, including in particular a progressive jet collimation along its axis.