2013 Fiscal Year Final Research Report
Structures around supermassive black holes and their evolution - feedback and feeding
| Project/Area Number |
23540267
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Astronomy
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| Research Institution | Kagoshima University |
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Principal Investigator |
WADA KEIICHI 鹿児島大学, 理工学研究科, 教授 (30261358)
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| Co-Investigator(Renkei-kenkyūsha) |
OHSUGA Ken 国立天文台, 理論研究部, 助教 (90386508)
KAWAKATSU Nozomu 呉工業高等専門学校, 発達科学部, 准教授 (30450183)
SUSA Hajime 甲南大学, 理工学部, 教授 (00323262)
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| Project Period (FY) |
2011 – 2013
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| Keywords | 銀河 / 輻射流体力学 / クェーサー |
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| Research Abstract |
We have theoretically investigated structures and dynamics of the ISM around supermassive black holes in galaxies. Using three-dimensional radiation-hydrodynamics simulations, we confirmed that non-steady and non-uniform outflows are generated due to the radiation pressure and heating. This outflow does not prevent from accreting materials toward the galactic center. We also found that a part of failed outflows naturally form an obscuring torus, which has been postulated to explain observed properties of AGNs. The radiation-driven outflows are ubiquitous over a large dynamic range, for example, we found that strong line-driven winds are formed from the accretion disk, and this consistently explains broad-absorption line quasars.
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