The Tilt between Acretion Disk and Stellar Disk
The Tilt between Acretion Disk and Stellar Disk
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DOI：
10.1007/s12036-011-9054-z
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发表时间：
2011-07
影响因子：
1.1
通讯作者：
S. Shen;Z. Shao;M. Gu
中科院分区：
文献类型：
--
作者：
S. Shen;Z. Shao;M. Gu
活动星系核(AGN)的吸积盘和其所在星系的恒星盘的取向都是由其形成气体的角动量决定的，但在物理环境和空间尺度上有很大的不同。在这里，我们通过比较从斯隆数字天空勘测(SDSS，York ket al.2000)中选择的一大批2型活动星系核的恒星盘倾角与一个对照星系样本的恒星盘倾角，证明了恒星盘的取向与吸积盘有关。假设对于低光度活动星系核，类型2活动星系核的比例在70%-90%之间，我们发现吸积盘和恒星盘之间的平均倾斜约为30度(Shenet al.2010)。
The orientations of the accretion disk of active galactic nuclei (AGN) and the stellar disk of its host galaxy are both determined by the angular momentum of their forming gas, but on very different physical environments and spatial scales. Here we show the evidence that the orientation of the stellar disk is correlated with the accretion disk by comparing the inclinations of the stellar disks of a large sample of Type 2 AGNs selected from Sloan Digital Sky Survey (SDSS, Yorket al.2000) to a control galaxy sample. Given that the Type 2 AGN fraction is in the range of 70–90 percent for low luminosity AGNs asa priori, we find that the mean tilt between the accretion disk and stellar disk is ~ 30 degrees (Shenet al.2010).