半人马座A千秒差距尺度喷流中的秒差距尺度激波
Parsec-scale shocks in the kiloparsec-scale jet of Centaurus A
摘要：
半人马座A的高角分辨率VLBI观测已经进行，允许访问到一个广泛的视野，包括充分研究的pc尺度喷流和内部的kpc尺度喷流。VLBI观测已经检测到的kpc规模的喷流，与三个固定的功能，从以前的VLA监测观测确定的同步辐射的紧凑区域。这些固定特征中的每一个都与强局部X射线发射相关联。VLBI的结果加强了以前的作者提出的论点，即静止的特征可能是恒星物体或气体云穿过喷流，拦截喷流并引起强烈冲击的结果。VLBI数据显示，这些特征中最强烈的冲击区域被解析，但范围不大于几个pc，相对于以前的估计，典型拦截物体的所需质量减少了约10倍，使得基于高质量损失恒星或低密度气体云的解释更合理。
英文摘要：
High angular resolution VLBI observations of Centaurus A have been undertaken that allow access to a wide field-of-view, encompassing both the well-studied pc-scale jet and the inner part of the kpc-scale jet. The VLBI observations have detected compact regions of synchrotron emission in the kpc-scale jet that coincide with three stationary features identified from previous VLA monitoring observations. Each of these stationary features is associated with strong localised X-ray emission. The VLBI results strengthen arguments made by previous authors suggesting that the stationary features may be the result of stellar objects or gas clouds traversing the jet flow, intercepting the jet and causing strong shocks. The VLBI data show that the most strongly shocked regions in these features are resolved but have extents no larger than a few pc, reducing the required mass of the typical intercepting object by a factor of ~10 relative to previous estimates, making explanations based on high mass loss stars or low density gas clouds more plausible.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
