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钱德拉X射线天文台拍摄的半人马座A的高分辨率X射线图像。

A Chandra High-Resolution X-ray Image of Centaurus A.

作者信息

Kraft RP, Forman W, Jones C, Kenter AT, Murray SS, Aldcroft TL, Elvis MS, Evans IN, Fabbiano G, Isobe T, Jerius D, Karovska M, Kim D, Prestwich AH, Primini FA, Schwartz DA, Schreier EJ, Vikhlinin AA

出版信息

Astrophys J. 2000 Mar 1;531(1):L9-L12. doi: 10.1086/312519.

Abstract

We present first results from a Chandra X-Ray Observatory observation of the radio galaxy Centaurus A with the High-Resolution Camera. All previously reported major sources of X-ray emission including the bright nucleus, the jet, individual point sources, and diffuse emission are resolved or detected. The spatial resolution of this observation is better than 1&arcsec; in the center of the field of view and allows us to resolve X-ray features of this galaxy not previously seen. In particular, we resolve individual knots of emission in the inner jet and diffuse emission between the knots. All of the knots are diffuse at the 1&arcsec; level, and several exhibit complex spatial structure. We find the nucleus to be extended by a few tenths of an arcsecond. Our image also suggests the presence of an X-ray counterjet. Weak X-ray emission from the southwest radio lobe is also seen, and we detect 63 pointlike galactic sources (probably X-ray binaries and supernova remnants) above a luminosity limit of approximately 1.7x1037 ergs s-1.

摘要

我们展示了钱德拉X射线天文台利用高分辨率相机对射电星系半人马座A进行观测的首批结果。所有先前报道的主要X射线发射源,包括明亮的星系核、喷流、单个点源和弥漫发射,都得到了分辨或探测。此次观测在视场中心的空间分辨率优于1角秒,使我们能够分辨出该星系此前未见过的X射线特征。特别是,我们分辨出了内部喷流中各个发射结以及结之间的弥漫发射。所有的结在1角秒的水平上都是弥漫的,并且有几个呈现出复杂的空间结构。我们发现星系核延伸了几十分之一角秒。我们的图像还显示存在一个X射线反向喷流。还观测到了来自西南射电瓣的微弱X射线发射,并且我们探测到63个点状星系源(可能是X射线双星和超新星遗迹),其光度极限约为1.7×10³⁷尔格/秒。

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