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MACER Improved: AGN Feedback Computed in Rotating Early-type Galaxies at High Resolution

文献类型:期刊论文

作者Gan,Zhaoming2; Ciotti,Luca3; Ostriker,Jeremiah P.1; Yuan,Feng2
刊名The Astrophysical Journal
出版日期2019-02-20
卷号872期号:2
ISSN号0004-637X
关键词black hole physics galaxies: elliptical and lenticular, cD galaxies: evolution methods: numerical
DOI10.3847/1538-4357/ab0206
英文摘要Abstract Based on our previous modeling of active galactic nucleus (AGN) feedback in isolated elliptical galaxies using the MACER (Massive AGN Controlled Ellipticals Resolved) code, we extend and improve the model to include rotation, to facilitate angular momentum transfer via the Toomre instability in gaseous disks, to limit the star formation to regions of high density and low temperature, and to improve the treatment of hot-mode (low accretion rate) AGN feedback. The model galaxy now has an extended dark matter profile that matches with standard observations, but it has a resolution of parsecs in the inner region and resolves the Bondi radius. We find that the results agree reasonably well with a panoply of observations: (1) Both AGN activity and star formation are primarily in central cold gaseous disks, are bursty, and are mainly driven by the Toomre instability. (2) The AGN duty cycle agrees well with the Soltan argument, i.e., the AGN spends most of its lifetime when it is in low luminosity (half of the time with ), while emitting most of its energy when it is in high luminosity (half of radiant energy emitted with L/LEdd?>?0.06). (3) The total star formation is roughly a few percent of the initial stellar mass, occurring in the bursts that would be associated with the observed E+A phenomenon. Most of the star formation occurs in a circumnuclear disk of size ≤1 kpc, which is in agreement with recent observations. (4) The interstellar medium X-ray luminosity varies within a reasonable range (median erg s?1), in agreement with observations.
语种英语
出版者The American Astronomical Society
WOS记录号IOP:0004-637X-872-2-AB0206
源URL[http://119.78.226.72/handle/331011/31937]  
专题中国科学院上海天文台
作者单位1.Department of Astronomy, Columbia University, 550 W. 120th Street, New York, NY 10027, USA
2.Shanghai Astronomical Observatory, Chinese Academy of Sciences, 80 Nandan Road, Shanghai 200030, People’s Republic of China
3.Department of Physics and Astronomy, University of Bologna, via Piero Gobetti 93/2, I-40129 Bologna, Italy
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GB/T 7714
Gan,Zhaoming,Ciotti,Luca,Ostriker,Jeremiah P.,et al. MACER Improved: AGN Feedback Computed in Rotating Early-type Galaxies at High Resolution[J]. The Astrophysical Journal,2019,872(2).
APA Gan,Zhaoming,Ciotti,Luca,Ostriker,Jeremiah P.,&Yuan,Feng.(2019).MACER Improved: AGN Feedback Computed in Rotating Early-type Galaxies at High Resolution.The Astrophysical Journal,872(2).
MLA Gan,Zhaoming,et al."MACER Improved: AGN Feedback Computed in Rotating Early-type Galaxies at High Resolution".The Astrophysical Journal 872.2(2019).

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来源:上海天文台

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