标题： 非常热气体在星暴星系中的漫射热辐射：光谱结果 显示英文标题

标题： Diffuse Thermal Emission from Very Hot Gas in Starburst Galaxies: Spectral Results

摘要： 新的贝波萨克斯对邻近典型星暴星系（SBGs）NGC253和M82的观测结果被呈现。主要的观测结果是明确的证据表明，硬（2-10 keV）成分在两个星系中主要是由金属贫乏（~ 0.1-0.3太阳），高温（kT \~ 6- 9 keV）且扩展的等离子体的热辐射产生的（参见附带论文：Cappi等，1998）。这种新发现的成分的可能来源被简要讨论。然而，与（银河系）银河系脊的X射线辐射显著相似，暗示了一个共同的物理机制。 显示英文摘要

摘要： New BeppoSAX observations of the nearby archetypical starburst galaxies (SBGs) NGC253 and M82 are presented. The main observational result is the unambiguous evidence that the hard (2-10 keV) component is (mostly) produced in both galaxies by thermal emission from a metal-poor (~ 0.1-0.3 solar), hot (kT \~ 6- 9 keV) and extended (see companion paper: Cappi et al. 1998) plasma. Possible origins of this newly discovered component are briefly discussed. A remarkable similarity with the (Milky Way) Galactic Ridge's X-ray emission suggests, nevertheless, a common physical mechanism.