论文标题
基于银河系和黑洞演化的半分析模型的索尔坦的论点
Revisiting Soltan's argument based on a semi-analytical model for galaxy and black hole evolution
论文作者
论文摘要
我们显示了超级质量黑洞（SMBHS）宇宙生长的超级 - 埃德丁顿积聚的意义，该模型具有半分析模型，用于银河系和黑洞的演化。该模型解释了在宽红移范围内的星系和活性银河核的各种观察到的特性。通过追踪单个SMBH的生长历史，我们发现在超级伊德丁顿积聚阶段获得的SMBH质量的比例变为总SMBH质量，对于较少的黑色孔和较高的红移而变得更大。即使在Z = 0时，具有> 1e+9 MSUN的SMBH也通过超级 - 伊德丁顿的积聚获得了超过50％的质量，这显然与古典Soltan的论点不一致。但是，使用我们的模型获得的> 1e+8 mSUN的SMBH的质量加权辐射效率约为0.08，在z = 0时约为0.08，这与观测不确定性中Soltan的论点一致。因此，我们得出的结论是，Soltan的论点不能拒绝SMBH的可能性主要由超级 - 埃德丁顿积聚。
We show the significance of the super-Eddington accretion for the cosmic growth of supermassive black holes (SMBHs) with a semi-analytical model for galaxy and black hole evolution. The model explains various observed properties of galaxies and active galactic nuclei at a wide redshift range. By tracing the growth history of individual SMBHs, we find that the fraction of the SMBH mass acquired during the super-Eddington accretion phases to the total SMBH mass becomes larger for less massive black holes and at higher redshift. Even at z = 0, SMBHs with > 1e+9 Msun have acquired more than 50% of their mass by super-Eddington accretions, which is apparently inconsistent with classical Soltan's argument. However, the mass-weighted radiation efficiency of SMBHs with > 1e+8 Msun obtained with our model, is about 0.08 at z = 0, which is consistent with Soltan's argument within the observational uncertainties. We, therefore, conclude that Soltan's argument cannot reject the possibility that SMBHs are grown mainly by super-Eddington accretions.
