论文标题
积聚磁盘中的原位恒星形成和AGN中黑洞质量与金属性之间相关性的解释
In-situ star formation in accretion disk and explanation for correlation between black hole mass and metallicity in AGNs
论文作者
论文摘要
最近的观察结果表明，主动银河核（AGNS）中宽线区域（$ z {\ rm blr} $）的金属性是太阳能到达的，它与超大型黑孔的质量正相关（$ m_ {$ m_ {\ rm bh} $），并与$ z $ z $ z $ z相关。我们对$ m _ {\ rm bh} -z _ {\ rm blr} $与更多AGN的相关性与$ m _ {\ rm bh} \ sim 10^{6-8} m _ {\ odot} $相关性，并发现正相关在低音范围内变得平坦。众所周知，积聚磁盘的外部在重力上是不稳定的，可以碎片成星。 Considering the star formation and supernovae (SNe) in the outer AGN disk, we calculate the metal enrichment and find that positive $M_{\rm BH}-Z_{\rm BLR}$ correlation can be roughly reproduced if the stellar mass distribution is ``top-heavy". We find that the observed BLR size is more or less similar to the self-gravity radius of the AGN磁盘，这表明BLR可能与基本吸积过程密切相关。
Recent observations show that the metallicity of the broad line region ($Z_{\rm BLR}$) in active galactic nuclei (AGNs) is solar-to-supersolar, which is positively correlated with the mass of supermassive black holes ($M_{\rm BH}$) and does not evolve with redshift up to $z \sim 7$. We revisit the $M_{\rm BH}-Z_{\rm BLR}$ correlation with more AGNs with $M_{\rm BH}\sim 10^{6-8} M_{\odot}$ and find that the positive correlation become flat in low-mass range. It is known that outer part of accretion disks is gravitationally unstable and can fragment into stars. Considering the star formation and supernovae (SNe) in the outer AGN disk, we calculate the metal enrichment and find that positive $M_{\rm BH}-Z_{\rm BLR}$ correlation can be roughly reproduced if the stellar mass distribution is ``top-heavy". We find that the observed BLR size is more or less similar to the self-gravity radius of the AGN disk, which suggests that the BLR may be closely correlated with the underlying accretion process.
