Triggering star formation by both radiative and mechanical AGN feedback
文献类型：期刊论文
| 作者 | Liu Chao1 ; Gan ZhaoMing1; Xie FuGuo1
|
| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
 |
| 出版日期 | 2013 |
| 卷号 | 13期号:8页码:899 |
| 关键词 | ACTIVE GALACTIC NUCLEI CENTRAL BLACK-HOLES SHELL ABSORPTION-LINES ULTRA-FAST OUTFLOWS RADIO-QUIET AGNS VELOCITY-DISPERSION ELLIPTIC GALAXIES QUASAR OUTFLOW BINARY-SYSTEMS HOST GALAXIES methods: numerical accretion shock waves galaxies: active galaxies: starburst |
| ISSN号 | 1674-4527 |
| 英文摘要 | We perform two dimensional hydrodynamic numerical simulations to study the positive active galactic nucleus (AGN) feedback which triggers, rather than suppresses, star formation. Recently, it was shown by Nayakshin et al. and Ishibashi et al. that star formation occurs when the cold interstellar medium (ISM) is squeezed by the impact of mass outflow or radiation pressure, respectively. Mass outflow is ubiquitous in this astrophysical context, and radiation pressure is also important if the AGN is luminous. For the first time in this subject, we incorporate both mass outflow feedback and radiative feedback into our model. Consequently, the ISM is shocked into shells by the AGN feedback, and these shells soon fragment into clumps and filaments because of Rayleigh-Taylor and thermal instabilities. We have two major findings: (1) the star formation rate can indeed be very large in the clumps and filaments. However, the resultant star formation rate density is too large compared with previous works, which is mainly because we ignore the fact that most of the stars that are formed would be disrupted when they move away from the galactic center. (2) Although radiation pressure feedback has a limited effect, when mass outflow feedback is also included, they reinforce each other. Specifically, in the gas-poor case, mass outflow is always the dominant contributor to feedback. |
| 资助项目 | [National Natural Science Foundation of China] ; [Shanghai Postdoctoral Scientific Program] |
| 语种 | 英语 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/61493]  |
| 专题 | 中国科学院国家天文台 |
| 作者单位 | 1.中国科学院国家天文台 2.中国科学院大学 |
| 推荐引用方式 GB/T 7714 | Liu Chao,Gan ZhaoMing,Xie FuGuo. Triggering star formation by both radiative and mechanical AGN feedback[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2013,13(8):899. |
| APA | Liu Chao,Gan ZhaoMing,&Xie FuGuo.(2013).Triggering star formation by both radiative and mechanical AGN feedback.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,13(8),899. |
| MLA | Liu Chao,et al."Triggering star formation by both radiative and mechanical AGN feedback".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 13.8(2013):899. |
入库方式： OAI收割
来源：国家天文台
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