论文标题
关于超级质量黑洞与电离时期星系生长之间的联系
On the Connection between Supermassive Black Hole and Galaxy Growth in the Reionization Epoch
论文作者
论文摘要
超级质量黑洞的质量（SMBHS； $ \ Mathcal {M} _ {\ rm BH} $）与他们的宿主星系（$ \ Mathcal {M} _ \ star $）在静止时段中提供了对早期增长的有价值的约束。高红速元数通常具有$ \ Mathcal {M} _ {\ rm BH} $/$ \ Mathcal {M} _ \ Star _ \ Star $比率与本地值显着提高。但是，对于最遥远的类星体而言，观察性偏见驱动的明显偏移的程度尚不清楚。为了解决此问题，我们根据基于ALMA观察结果的$ z \ sim6 $在$ z \ sim6 $中对样本选择和测量偏差进行建模。我们发现，在$ \ Mathcal {m} _ {\ rm bh} - \ Mathcal {M} _ \ star $平面可以通过假设$ z \ sim6 $在本地宇宙中的关系之后，可以重现观察到的类星体分布。但是，$ \ MATHCAL {M} _ {\ rm BH} $/$ \ MATHCAL {M} _ \ star $中的正面甚至负面的演变也可以解释数据，取决于内在散点是否会演变和各种系统不确定性的强度。为了打破这些变性，需要提高质量测量的准确性以及将当前样本扩展到较低$ \ \ \ \ \ \ \ \ \ \ \ \ rm bh} $限制。 Furthermore, assuming a radiative efficiency of 0.1 and quasar duty cycles estimated from the active SMBH fraction, significant outliers in $\mathcal{M}_{\rm BH}$/$\mathcal{M}_\star$ tend to move toward the local relation given their instantaneous BH growth rate and star formation rate.这可能提供了自我调节的SMBH-Galaxy协同进化方案的证据，该方案处于$ z \ sim6 $，而AGN反馈是可能的驱动程序。
The correlation between the mass of supermassive black holes (SMBHs; $\mathcal{M}_{\rm BH}$) and their host galaxies ($\mathcal{M}_\star$) in the reionization epoch provides valuable constraints on their early growth. High-redshift quasars typically have a $\mathcal{M}_{\rm BH}$/$\mathcal{M}_\star$ ratio significantly elevated in comparison to the local value. However, the degree to which this apparent offset is driven by observational biases is unclear for the most distant quasars. To address this issue, we model the sample selection and measurement biases for a compilation of 20 quasars at $z\sim6$ with host properties based on ALMA observations. We find that the observed distribution of quasars in the $\mathcal{M}_{\rm BH} - \mathcal{M}_\star$ plane can be reproduced by assuming that the underlying SMBH population at $z\sim6$ follows the relationship in the local universe. However, a positive or even a negative evolution in $\mathcal{M}_{\rm BH}$/$\mathcal{M}_\star$ can also explain the data, depending on whether the intrinsic scatter evolves and the strength of various systematic uncertainties. To break these degeneracies, an improvement in the accuracy of mass measurements and an expansion of the current sample to lower $\mathcal{M}_{\rm BH}$ limits are needed. Furthermore, assuming a radiative efficiency of 0.1 and quasar duty cycles estimated from the active SMBH fraction, significant outliers in $\mathcal{M}_{\rm BH}$/$\mathcal{M}_\star$ tend to move toward the local relation given their instantaneous BH growth rate and star formation rate. This may provide evidence for a self-regulated SMBH-galaxy coevolution scenario that is in place at $z\sim6$, with AGN feedback being a possible driver.
