High-resolution x-ray observations of M87: Nucleus, jet, and radio halo
High-resolution x-ray observations of M87: Nucleus, jet, and radio halo
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M87 的高分辨率 X 射线观测：原子核、喷流和射电晕
DOI：
10.1086/160316
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发表时间：
1982
期刊：
影响因子：
--
通讯作者：
E. Feigelson
中科院分区：
文献类型：
--
作者：
E. Schreier;P. Gorenstein;E. Feigelson
使用爱因斯坦天文台 HRI 对 M87 进行的 X 射线观测表明存在四种成分。与星系中的热气体相关的广泛的、扩散的成分遵循并近似于逆幂律；气体压力足以限制内部和外部射电波瓣。东部和西南部的弥散、不对称 X 射线分布看起来与射电形态相似，并且与逆康普顿模型一致。以星系核为中心的 X 射线源延伸了 2''-3''，可能是由于热轫致辐射所致；与其他活跃星系相比，小于 10/sup 41/ ergs s/sup -1/ 的可能致密（核）源较弱，并且讨论了其对大质量黑洞存在的影响。还可以看到与射电光射流相关的结构； X 射线通量与光学同步加速器光谱的外推一致。这四个分量表明 M87 中存在所有三种标准天体物理 X 射线发射机制：热轫致辐射、逆康普顿散射和同步加速器辐射。
X-ray observations of M87 made using the Einstein Observatory HRI show the presence of four components. A broad, diffuse component associated with hot gas in the galaxy follows and approximte inverse power law; the pressur of the gas could be sufficient to confine the inner and outer radio lobes. A diffuse, asymmetrical X-ray distribution to the east and southwest appears similar to the radio morphology and is consistent with an inverse Compton model. An X-ray source centered on the nucleus of the galaxy is extended by 2''-3'' and may be due to thermal bremsstrahlung; a possible compact (nuclear) source of less than 10/sup 41/ ergs s/sup -1/ is weak compared with other active galaxies, and its implications for the presence of a massive black hole are discussed. A structure correlated with the radio-optical jet is also seen; the X-ray flux is consistent with an extrapolation of the optical synhrotron spectrum. The four components suggest that all three canonical astrophysical X-ray emission mechanisms are present in M87: thermal bremsstrahlung, inverse Compton scattering, and synchrotron radiation.