arXiv 0712.35792007-12-20astro-ph

半人马座A在哪里得到它的X射线打结

Where Centaurus A gets its X-ray knottiness

D. M. Worrall, M. Birkinshaw, R. P. Kraft, G. R. Sivakoff, A. Jordan, M. J. Hardcastle, N. J. Brassington, J. H. Croston, D. A. Evans, W. R. Forman, W. E. Harri… 展开作者

D. M. Worrall, M. Birkinshaw, R. P. Kraft, G. R. Sivakoff, A. Jordan, M. J. Hardcastle, N. J. Brassington, J. H. Croston, D. A. Evans, W. R. Forman, W. E. Harris, C. Jones, A. M. Juett, S. S. Murray, P. E. J. Nulsen, S. Raychaudhury, C. L. Sarazin, K. A. Woodley

备注：: Accepted for publication in ApJ (Letters)
DOI：: 10.1086/528681

阅读 PDF

arXiv 页面 ↗HTML 原文 ↗

摘要：

我们报告了一个X射线光谱研究的横向结构的半人马座A喷流使用新的数据从钱德拉Cen一个非常大的项目。我们发现光谱随着距喷流轴的距离的增加而变陡，并且这种变陡可以归因于棘手发射的平均光谱的变化。如果结主要是存在于较快和较慢流动之间的剪切层中的表面特征，则这种趋势是出乎意料的。我们建议，光谱陡峭的结发射作为从射流轴的距离的函数是由于结迁移，这意味着一个组件的横向运动的节内的流。

英文摘要：

We report an X-ray spectral study of the transverse structure of the Centaurus A jet using new data from the Chandra Cen A Very Large Project. We find that the spectrum steepens with increasing distance from the jet axis, and that this steepening can be attributed to a change in the average spectrum of the knotty emission. Such a trend is unexpected if the knots are predominantly a surface feature residing in a shear layer between faster and slower flows. We suggest that the spectral steepening of the knot emission as a function of distance from the jet axis is due to knot migration, implying a component of transverse motion of knots within the flow.

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。