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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Properties of galaxies around AGNs with the most massive supermassive black holes revealed by clustering analysis
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Properties of galaxies around AGNs with the most massive supermassive black holes revealed by clustering analysis

机译：通过聚类分析揭示具有最大质量超大质量黑洞的AGNs周围星系的性质

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摘要

We present results of the clustering analysis between active galactic nuclei (AGNs) and galaxies at redshift 0.1-1.0, which was performed to investigate the properties of galaxies associated with the AGNs and reveal the nature of the fueling mechanism of supermassive black holes (SMBHs). We used 8059 AGNs/quasi-stellar objects (QSOs) for which virial masses of individual SMBHs were measured, and divided them into four mass groups. Cross-correlation analysis was performed to reconfirm our previous result that cross-correlation length increases with SMBH mass M-BH; we obtained consistent results. A linear bias of AGN for each mass group was measured as 1.47 for M-BH = 10(7.5)-10(8.2) M-circle dot and 3.08 for M-BH = 10(9)-10(10) M-circle dot. The averaged color and luminosity distributions of galaxies around the AGNs/QSOs were also derived for each mass group. The galaxy color Dopt-IR was estimated from a spectral energy distribution (SED) constructed from a catalog derived by merging the Sloan Digital Sky Survey (SDSS) and the UKIRT Infrared Deep Sky Survey (UKIDSS) catalogs. The distributions of color and luminosity were derived by a subtraction method, which does not require redshift information of galaxies. The main results of this work are as follows. (1) A linear bias increases by a factor of two from the lower-mass group to the highest-mass group. (2) The environment around AGNs with the most massive SMBHs (M-BH > 10(9) M-circle dot) is dominated by red sequence galaxies. (3) Marginal indication of decline in luminosity function at dimmer side of M-IR >-19.5 is found for galaxies around AGNs with M-BH = 10(8.2)-10(9) M-circle dot and nearest redshift group (z = 0.1-0.3). These results indicate that AGNs with the most massive SMBHs reside in haloes where a large fraction of galaxies have been transited to the red sequence. The accretion of hot halo gas as well as recycled gas from evolving stars can be one of the plausible mechanisms to fuel the SMBHs above similar to 10(9) M-circle dot.
机译：我们提出了在红移0.1-1.0时活动银河系原子核（AGN）与星系之间的聚类分析结果，旨在研究与AGNs相关的星系的性质，并揭示了超大质量黑洞（SMBH）的加油机理的性质。 。我们使用8059个AGN /准星体（QSO）来测量各个SMBH的病毒质量，并将其分为四个质量组。进行互相关分析以确认我们先前的结果，即互相关长度随SMBH质量M-BH的增加而增加;我们获得了一致的结果。每个质量组的AGN线性偏差对于M-BH = 10（7.5）-10（8.2）M圆点测量为1.47，对于M-BH = 10（9）-10（10）M圆测量为3.08点。还为每个质量组得出了AGN / QSO周围星系的平均颜色和亮度分布。星系颜色Dopt-IR是根据光谱能量分布（SED）估算的，该光谱能量分布是通过合并斯隆数字天空测量（SDSS）和UKIRT红外深空测量（UKIDSS）目录而得到的。颜色和亮度的分布是通过减法得出的，该方法不需要星系的红移信息。这项工作的主要结果如下。 （1）从低质量组到高质量组，线性偏差增加了两倍。 （2）具有最大SMBH（M-BH> 10（9）M圆点）的AGN周围的环境主要由红色序列星系控制。 （3）对于M-BH = 10（8.2）-10（9）的M圆点和最近的红移组（z），在AGN周围的星系中发现了M-IR调光器> -19.5处亮度功能下降的边缘指示。 = 0.1-0.3）。这些结果表明，具有最大SMBH的AGN存在于光环中，其中大部分星系已转变为红色序列。类似于从10（9）M圆点开始，不断上升的恒星产生的热晕气体和再循环气体的积聚可能是向SMBH供电的合理机制之一。

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