THE SPATIAL CLUSTERING OF ROSAT ALL-SKY SURVEY ACTIVE GALACTIC NUCLEI. IV. MORE MASSIVE BLACK HOLES RESIDE IN MORE MASSIVE DARK MATTER HALOS
THE SPATIAL CLUSTERING OF ROSAT ALL-SKY SURVEY ACTIVE GALACTIC NUCLEI. IV. MORE MASSIVE BLACK HOLES RESIDE IN MORE MASSIVE DARK MATTER HALOS
复制标题
DOI：
10.1088/0004-637x/815/1/21
复制
发表时间：
2015-09
期刊：
影响因子：
--
通讯作者：
M. Krumpe;T. Miyaji;B. Husemann;N. Fanidakis;A. Coil;H. Aceves
中科院分区：
文献类型：
--
作者：
M. Krumpe;T. Miyaji;B. Husemann;N. Fanidakis;A. Coil;H. Aceves
这是一系列报告中的第四篇文章，报告了我们对ROSAT全天巡天和斯隆数字巡天（SDSS）中确定的活动星系核（AGN）聚类特性的调查。本文研究了宽线活动星系核在0.16处成团的X射线光度依赖性的原因，拟合了所有X射线和光学选择的宽线活动星系核的SDSS谱中的Hα线轮廓，确定了超大质量黑洞的质量M BH，？并推导出相对于爱丁顿的吸积速率（L / L EDD？> ).因为M BH？>和L / L EDD？>是相关的，我们在一个参数中创建活动星系核子样本，同时在另一个参数中保持相同的分布。在X射线和光学选择AGN样本，我们检测到一个弱的集群依赖M BH？>对L / L EDD无显著依赖性。?>我们发现，当比较属于30%最小和30%最大质量的M BH的物体时，差异高达2.7σ。子样本，在发光的宽线活动星系核与更大质量的黑洞居住在更大质量的母暗物质晕在这些红移。这些结果提供的证据表明，AGN中较高的吸积率并不一定需要密集的星系环境，在这种环境中，更多的星系合并和相互作用预计会将大量气体引导到SMBH上。我们还提出了半解析模型，预测一个积极的M DMH？>对M BH的依赖，？>在M BH <$10 8 − 9 M <$10处最为突出。?>
This is the fourth paper in a series that reports on our investigation of the clustering properties of active galactic nuclei (AGNs) identified in the ROSAT All-Sky Survey and Sloan Digital Sky Survey (SDSS). In this paper we investigate the cause of the X-ray luminosity dependence of the clustering of broad-line, luminous AGNs at 0.16 We fit the Hα line profile in the SDSS spectra for all X-ray and optically selected broad-line AGNs, determine the mass of the supermassive black hole (SMBH), M BH , ?> and infer the accretion rate relative to Eddington ( L / L EDD ?> ). Since M BH ?> and L / L EDD ?> are correlated, we create AGN subsamples in one parameter while maintaining the same distribution in the other parameter. In both the X-ray and optically selected AGN samples, we detect a weak clustering dependence with M BH ?> and no statistically significant dependence on L / L EDD . ?> We find a difference of up to 2.7σ when comparing the objects that belong to the 30% least and 30% most massive M BH ?> subsamples, in that luminous broad-line AGNs with more massive black holes reside in more massive parent dark matter halos at these redshifts. These results provide evidence that higher accretion rates in AGNs do not necessarily require dense galaxy environments, in which more galaxy mergers and interactions are expected to channel large amounts of gas onto the SMBH. We also present semianalytic models that predict a positive M DMH ?> dependence on M BH , ?> which is most prominent at M BH ∼ 10 8 − 9 M ⊙ . ?>