论文标题
超级血症温度或霓虹灯过度吗？
Super-virial temperature or Neon overabundance?: Suzaku observations of the Milky Way circumgalactic Medium
论文作者
论文摘要
我们分析了Suzaku和Chandra对四个视线的柔软X射线背景的观察结果，其目的是表征来自银河系的X射线发射（CGM）。我们确定了CGM的两个热成分，一个在$ \ rm kt的均匀温度下= 0.176 \ pm0.008〜KEV $，另一个在温度下为$ \ rm kt = 0.65-0.90〜kev $。均匀的较低温度分量与银河系的病毒温度一致（$ \ sim10^{6} 〜k $）。较热的成分的温度与最近发现的（$ \ rm \ sim 10^{7} 〜k $; das等人）的温度相似，直到Blazar 1ES1553+113，传递到Fermi Bubble附近。另外，只能通过一个具有超极性霓虹灯丰度的低温组分来描述光谱，这再次类似于1ES1553+113瞄准素中的光谱。需要额外的热点或NE的过度，需要$>4σ$，但我们无法区分这两种可能性。这些结果表明，CGM中热热气体中的超级温度气体或增强的NE丰度是广泛的，并且不一定与费米气泡有关。
We analyzed Suzaku and Chandra observations of the soft diffuse X-ray background toward four sightlines with the goal of characterizing the X-ray emission from the Milky Way circumgalactic medium (CGM). We identified two thermal components of the CGM, one at a uniform temperature of $\rm kT = 0.176\pm0.008 ~keV$ and the other at temperatures ranging between $\rm kT = 0.65-0.90~ keV$. The uniform lower temperature component is consistent with the Galaxy's virial temperature ($ \sim10^{6}~ K$). The temperatures of the hotter components are similar to that recently discovered ($\rm \sim 10^{7}~ K$; Das et al.) in the sightline to blazar 1ES1553+113, passing close to the Fermi bubble. Alternatively, the spectra can be described by just one lower-temperature component with super-solar Neon abundance, once again similar to that found in the 1ES1553+113 sightline. The additional hot component or the overabundance of Ne is required at a significance of $>4σ$, but we cannot distinguish between the two possibilities. These results show that the super-virial temperature gas or an enhanced Ne abundance in the warm-hot gas in the CGM is widespread, and these are not necessarily related to the Fermi bubble.
