类星体光度和暗物质晕的统计关系

发布时间：2018-02-24 12:06

本文关键词： 类星体暗物质晕星系形成　出处：《天文学进展》2015年03期 　论文类型：期刊论文

【摘要】：活动星系核的能量反馈是星系形成理论模型中的一个重要物理过程,与星系所处的暗物质晕质量、星系中央大质量黑洞吸积率等因素有关。当前的半解析模型预测活动星系核反馈机制主要有两种模式:射电模式和类星体模式,前者主要发生在大质量暗晕中央的大质量星系中,后者主要由较小质量星系并合导致。利用斯隆数字化巡天(SDSS)提供的目前最大的类星体光谱观测样本,结合基于SDSS构建的星系群(团)表,从统计上分析了类星体的热光度和暗晕质量的分布情况。初步分析结果显示,在大质量暗晕中,类星体的热光度和所在暗晕的质量没有相关性,类星体所在暗晕的质量分布很广,进一步证实了高光度的类星体并不存在于大质量的暗晕中。
[Abstract]:The energy feedback of active galactic nuclei is an important physical process in the theoretical model of galaxy formation, and the mass of dark matter halo in which the galaxy is located. There are two main models for predicting the active galactic nucleus feedback mechanism: radio model and quasar model. The former mainly occurs in the large mass galaxies in the center of the mass dark halo, while the latter is mainly caused by the combination of the smaller mass galaxies. The largest spectral observation sample of quasars is provided by the Sloan Digital Sky Survey (SDSSs). The thermal luminosity and dark halo mass distribution of quasars are statistically analyzed by combining the cluster (cluster) table based on SDSS. The preliminary analysis results show that in large mass dark halos, There is no correlation between the thermal luminosity of the quasar and the mass of the dark halo, and the mass distribution of the dark halo of the quasar is very wide, which further proves that the high luminosity quasar does not exist in the large mass dark halo.
【作者单位】：中国科学院上海天文台星系与宇宙学重点实验室;
【基金】：国家自然科学基金(Y245711001)
【分类号】：P158;P145.9

【共引文献】