论文标题
RGS观察到Tycho的超新星残留物中的弹射器结
RGS Observations of Ejecta Knots in Tycho's Supernova Remnant
论文作者
论文摘要
我们介绍了{\ it Xmm-Newton/rgs}观察到泰乔（Tycho）超新星残留物中最南端的突出结的观察结果，已知是1572年的IA型SN的残留物，是通过将光子从这些结中分散在这些结中，几乎是在他们的前后，我们几乎没有发出的序列。在最南端的结中，RGS成功解决了Si，ne，O He $α$和ly $α$的众多排放线，以及Fe l-Shell。这是对Tycho SNR中O线的第一个清晰检测。对于O He $α$和Fe L线的O He $α$和$ \ sim 4.5 $ eV的线宽度为$ \ sim 3 $ ev。如果我们将扩展归因于纯热多普勒效应，那么我们将获得kt $ _ {o} $和kt $ _ {fe} $分别为$ \ sim 400 $ kev和1.5 mev。这些温度可以通过以$ \ sim 3500 $ km s $^{ - 1} $的冲击速度在反向冲击中加热来解释。通过将RGS和MOS数据拟合在一起而获得的丰度意味着这些材料的量显着升高，证实了以前的研究，即通过反向冲击加热结，因此包含来自超新星的喷射材料。我们找不到重现这些丰度的IA型爆炸模型，但这很可能是这种结太小而无法推断到整个残留物的结果。
We present results from {\it XMM-Newton/RGS} observations of prominent knots in the southest portion of Tycho's supernova remnant, known to be the remnant of a Type Ia SN in 1572 C.E. By dispersing the photons from these knots out of the remnant with very little emission in front of or behind them, we obtained the nearly uncontaminated spectra of the knots. In the southernmost knot, the RGS successfully resolved numerous emission lines from Si, Ne, O He$α$ and Ly$α$, and Fe L-shell. This is the first clear detection of O lines in Tycho's SNR. Line broadening was measured to be $\sim 3$ eV for the O He$α$ and $\sim 4.5$ eV for Fe L lines. If we attribute the broadening to pure thermal Doppler effects, then we obtain kT$_{O}$ and kT$_{Fe}$ to be $\sim 400$ keV and 1.5 MeV, respectively. These temperatures can be explained by heating in a reverse shock with a shock velocity of $\sim 3500$ km s$^{-1}$. The abundances obtained from fitting the RGS and MOS data together imply substantially elevated amounts of these materials, confirming previous studies that the knots are heated by a reverse shock, and thus contain ejecta material from the supernova. We are unable to find a Type Ia explosion model that reproduces these abundances, but this is likely the result of this knot being too small to extrapolate to the entire remnant.
