星系群中活动星系核的比例研究

发布时间：2019-06-09 14:36

【摘要】：相对于大量X射线辐射显著而无光学发射线的活动星系核(AGN),已被光谱证认了的X射线选AGN可能尚处于黑洞显著增长的高吸积率演化阶段,因而具有明显的光学发射线特征.利用COSMOS(Cosmological Evolution Survey)天区深场多波段测光和光谱数据,在红移范围为0.1z1.0的星系群成员星系样本中寻找具有光学发射线特征的X射线选AGN.研究发现,星系群中的绝大多数这类AGN(约96%)是窄发射线AGN,星系群中AGN比例普遍低于1%,且随着红移有微弱的上升趋势.
[Abstract]:Compared with a large number of active galactic nucleus (AGN), which has significant X-ray radiation and no optical emission, the X-ray selected AGN, which has been confirmed by spectrum, may still be in the stage of hyperaccretion evolution of black hole. Therefore, it has obvious optical emission line characteristics. Based on the deep field multi-band photometric and spectral data of COSMOS (Cosmological Evolution Survey) sky region, the X-ray selected AGN. with optical emission line characteristics is found in the samples of galaxy cluster members with red shift range of 0.1z1.0. It is found that most of these AGN (about 96%) in galactic clusters are generally less than 1% of AGN in narrow-emission AGN, clusters, and have a weak upward trend with the red shift.
【作者单位】：南京师范大学物理科学与技术学院;青岛科技大学数理学院;常州大学数理学院;
【基金】：国家自然科学基金项目(11173016,11433005) 高等学校博士学科点专项科研基金项目(20133207110006)资助
【分类号】：P157.6

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