标题： 射电明亮星系 3C 382 中的扩展 X 射线发射 显示英文标题

标题： Extended X-ray emission in the radio loud galaxy 3C 382

摘要： ROSAT/HRI 对强射电明亮星系 3C382 的观测揭示了与该源相关的扩展 X 射线辐射。基于这一新的空间成分，之前对这个源的 ROSAT/PSPC 光谱分析被修订。考虑到 PSPC 光谱中存在额外热成分的可能性，发现非热成分与 3C382 的明确界定的 2-10 keV 能区幂律光谱在软 X 射线区域的外推结果一致。那么，热——扩展——成分可以解释之前报道的该源的软过量发射。此热成分的起源尚不清楚。它的亮度与富 Abell 星团的亮度相当；然而，3C382 中的星系环境在光学上显得中等丰富。另一种可能性是它是由 3C382 深重引力势阱维持的大规模扩展气体大气造成的。 显示英文摘要

摘要： ROSAT/HRI observations of the powerful radio-loud galaxy 3C382 reveal extended X-ray emission associated with the source. On the basis of this new spatial component, a previous ROSAT/PSPC spectral analysis of the source is revised. Allowing for the presence of an additional thermal component in the PSPC spectrum, the non-thermal component is found to be compatible with the extrapolation of the well defined 3C382 - 2-10 keV - power-law spectrum into the soft X-rays. The thermal -extended- component would then account for the soft excess emission previously reported for this source. The origin of this thermal component is not clear. Its luminosity compares with that of rich Abell clusters; yet, the galaxy environment in 3C382 appears of moderate optical richness. An alternative is that it is due to a massive extended gaseous atmosphere sustained by the deep gravitational potential well of 3C382.