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arXiv 0907.0142astro-ph.CO
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宿主星系形态对超大质量黑洞质量的调控

Supermassive Black Hole Mass Regulated by Host Galaxy Morphology

Y. Watabe, N. Kawakatu, M. Imanishi, T. T. Takeuchi

摘要:

研究了塞弗特星系和Palomar-Green类星体中的超大质量黑洞质量与宿主星暴亮度之间的关系,重点研究了宿主星系的形态。宿主星暴光度是从11.3微米的多环芳烃光度导出的。我们发现椭圆主导的宿主星系的SMBH质量在统计上比盘主导的宿主星系的质量大。我们还发现,SMBH质量的磁盘为主的宿主星系似乎被抑制,即使在增加星暴亮度。这些发现意味着最终SMBH的质量受到宿主星系形态的强烈调控。这可以通过考虑辐射拖曳模型作为SMBH生长机制来理解,并考虑到宿主星系的辐射效率。

英文摘要:

We investigated the relationship between supermassive black hole (SMBH) mass and host starburst luminosity in Seyfert galaxies and Palomar-Green QSOs, focusing on the host galaxy morphology. Host starburst luminosity was derived from the 11.3 micron polycyclic aromatic hydrocarbon luminosity. We found that the SMBH masses of elliptical-dominated host galaxies are more massive than those of disk-dominated host galaxies statistically. We also found that the SMBH masses of disk-dominated host galaxies seem to be suppressed even under increasing starburst luminosity. These findings imply that final SMBH mass is strongly regulated by host galaxy morphology. This can be understood by considering the radiation drag model as the SMBH growth mechanism, taking into account the radiation efficiency of the host galaxy.

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