论文标题
测定局部活性银河核中超质量黑洞旋转
Determination of supermassive black hole spins in local active galactic nuclei
论文作者
论文摘要
我们使用3种流行模型估计了许多局部活性银河核的辐射效率和自旋值，使用3种流行模型将辐射效率与AGN的参数连接起来，例如超级质量黑洞的质量，视力线与吸积盘和抛光光度的轴之间的角度。对获得的数据的分析表明，自旋值随宇宙时间降低，这与其他作者低红移AGN的理论计算结果一致。我们还发现，随着SMBH质量和降压仪的增加，旋转值会增加。这是与理论计算相对应的预期结果。对自旋值的分布的分析显示，分布在0.75 <a <1.0范围内的峰值明显。 〜40％的物体具有旋转a> 0.75，而约50％的物体具有旋转a> 0.5。该结果与我们以前的结果以及其他作者的结果非常吻合。
We estimated the radiative efficiency and spin value for a number of local active galactic nuclei with z < 0.34 using 3 popular models connecting the radiative efficiency with such parameters of AGNs as mass of supermassive black hole, angle between the line of sight and the axis of the accretion disk and bolometric luminosity. Analysis of the obtained data shown that the spin value decreases with cosmic time, which is in agreement with results of theoretical calculations for low redshift AGNs of other authors. Also we found that the spin value increases with the increasing mass of SMBH and bolometric luminosity. This is the expected result that corresponds to theoretical calculations. Analysis of the distribution of the spin values shown a pronounced peak in the distribution in 0.75 < a < 1.0 range. ~ 40% of objects have spin a > 0.75 and ~ 50% of objects have spin a > 0.5. This results are in a good agreement with our previous results and with the results of other authors.
