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Feedback from Active Galactic Nuclei in Galaxy Groups
被引:91
作者:
Eckert, Dominique
[1
]
Gaspari, Massimo
[2
,3
]
Gastaldello, Fabio
[4
]
Le Brun, Amandine M. C.
[5
]
O'Sullivan, Ewan
[6
]
机构:
[1] Univ Geneva, Dept Astron, Ch Ecogia 16, CH-1290 Versoix, Switzerland
[2] INAF Osservatorio Astrofis & Sci Spazio Bologna, Via Piero Gobetti 93-3, I-40129 Bologna, Italy
[3] Princeton Univ, Dept Astrophys Sci, 4 Ivy Lane, Princeton, NJ 08544 USA
[4] INAF, IASF Milano, Via A Corti 12, I-20133 Milan, Italy
[5] Univ Paris Diderot, PSL Res Univ, LUTh, UMR 8102 CNRS,Observ Paris, 5 Pl Jules Janssen, F-92190 Meudon, France
[6] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
来源:
关键词:
black holes;
galaxy groups;
elliptical galaxies;
intragroup medium/plasma;
active nuclei;
X-ray observations;
hydrodynamical and cosmological simulations;
SUPERMASSIVE BLACK-HOLES;
X-RAY CAVITIES;
EXTRAGALACTIC RADIO-SOURCES;
BRIGHTEST CLUSTER GALAXIES;
HOT GASEOUS ATMOSPHERES;
VOLUME-LIMITED SAMPLE;
NEWTON GROUP SURVEY;
HALO MASS FUNCTION;
DARK-MATTER HALOS;
AGN FEEDBACK;
D O I:
10.3390/universe7050142
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
The co-evolution between supermassive black holes and their environment is most directly traced by the hot atmospheres of dark matter halos. The cooling of the hot atmosphere supplies the central regions with fresh gas, igniting active galactic nuclei (AGN) with long duty cycles. Outflows from the central engine tightly couple with the surrounding gaseous medium and provide the dominant heating source preventing runaway cooling by carving cavities and driving shocks across the medium. The AGN feedback loop is a key feature of all modern galaxy evolution models. Here, we review our knowledge of the AGN feedback process in the specific context of galaxy groups. Galaxy groups are uniquely suited to constrain the mechanisms governing the cooling-heating balance. Unlike in more massive halos, the energy that is supplied by the central AGN to the hot intragroup medium can exceed the gravitational binding energy of halo gas particles. We report on the state-of-the-art in observations of the feedback phenomenon and in theoretical models of the heating-cooling balance in galaxy groups. We also describe how our knowledge of the AGN feedback process impacts galaxy evolution models and large-scale baryon distributions. Finally, we discuss how new instrumentation will answer key open questions on the topic.
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页数:58
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