MCG-6-30-15的铁Kα线的研究  

An Analysis of Iron Kα line in MCG-6-30-15

作　　者：毛慰明[1] 

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650052

出　　处：《云南师范大学学报（自然科学版）》2012年第4期4-7,共4页Journal of Yunnan Normal University:Natural Sciences Edition

摘　　要：活动星系核的X射线性质是近几十年X射线天文学研究的一大热点。铁Kα线位于X波段的6-7keV能区,是来自活动星系核中的冷物质的荧光辐射。随着XMM-Newton和Chandra等高性能X射线望远镜投入使用,铁Kα线的研究也更加深入。通常,宽的铁Kα线被认为是研究AGN中心黑洞最好的探针,一个最著名的例子就是MCG-6-30-15。ASCA和XMM-Newton卫星已经对MCG-6-30-15进行了多次观测和研究,发现有明显的宽的铁Kɑ线存在。研究铁Kα线的轮廓能给出黑洞自旋的一些信息,这些信息对了解黑洞的吸积、演化有重要意义。文章选取XMM-Newton卫星已对MCG-6-30-15的一次观测来研究MCG-6-30-15铁Kα线性质。The study of Active galactic nuclei X-ray properties is the most active frontiers field of X ray astrophysics. The Fe Ka line, as the most prominent feature in the 6 - 7 keV band in the X-ray spectrum, provides an important diagnostic of the nature of the disk and the central black hole. The line is produced from X-ray irradiation of cold gas around the black hole. A very broad Fe Ka emission line is regarded as a powerful probe to test the gravity of the central black hole in AGNs such as in MCG - 6 - 30 - 15. Early results from ASCA and XMM-Newton observations suggested that broad relativistic lines might be common. In this pa- per, we select an observation of MCG - 6 - 30 - 15 from the XMM-Newton archive to study the properties of the Fe Ka profile.

关 键 词：活动星系核 X射线 铁Kɑ线 MCG-6-30-15 

分 类 号：P14[天文地球—天体物理]