FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*

CORC > 厦门大学 > 物理技术－已发表论文

	FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*
	Mou, Guobin ; Yuan, Feng ; Bu, Defu ; Sun, Mouyuan ; Su, Meng ; Sun MY(孙谋远)
刊名	http://dx.doi.org/10.1088/0004-637X/790/2/109
	2014-08-01
关键词	SUPERMASSIVE BLACK-HOLE ADVECTION-DOMINATED ACCRETION ACTIVE GALACTIC NUCLEI RAY REFLECTION-NEBULA SAGITTARIUS B2 CLOUD STELLAR ORBITS MILKY-WAY NUMERICAL-SIMULATION INTERSTELLAR BUBBLES CENTRAL PARSEC
英文摘要	Natural Science Foundation of China [11103061, 11133005, 11121062, 11103059]; National Basic Research Program of China (973 Program) [2014CB845800]; Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences [XDB09000000]; China Scholarship Council [[2013] 3009]; NASA through Einstein Postdoctoral Fellowship by the Chandra X-ray Center [PF2-130102]; NASA [NAS8-03060]; A pair of giant gamma-ray Bubbles has been revealed by Fermi-LAT. In this paper we investigate their formation mechanism. Observations have indicated that the activity of the supermassive black hole located at the Galactic center, Sgr A, was much stronger than at the present time. Specifically, one possibility is that while Sgr A was also in the hot accretion regime, the accretion rate should be 10(3)-10(4) times higher during the past similar to 10(7) yr. On the other hand, recent magnetohydrodynamic numerical simulations of hot accretion flows have unambiguously shown the existence and obtained the properties of strong winds. Based on this knowledge, by performing three-dimensional hydrodynamical simulations, we show in this paper that the Fermi Bubbles could be inflated by winds launched from the "past" hot accretion flow in Sgr A. In our model, the active phase of Sgr A is required to last for about 10 million years and it was quenched no more than 0.2 million years ago. The central molecular zone (CMZ) is included and it collimates the wind orientation toward the Galactic poles. Viscosity suppresses the Rayleigh-Taylor and Kelvin-Helmholtz instabilities and results in the smoothness of the Bubbles edge. The main observational features of the Bubbles can be well explained. Specifically, the ROSAT X-ray features are interpreted by the shocked interstellar medium and the interaction region between the wind and CMZ gas. The thermal pressure and temperature obtained in our model are consistent with recent Suzaku observations.
语种	英语
出版者	IOP PUBLISHING LTD
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/91994]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Mou, Guobin,Yuan, Feng,Bu, Defu,et al. FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*[J]. http://dx.doi.org/10.1088/0004-637X/790/2/109,2014.
APA	Mou, Guobin,Yuan, Feng,Bu, Defu,Sun, Mouyuan,Su, Meng,&孙谋远.(2014).FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*.http://dx.doi.org/10.1088/0004-637X/790/2/109.
MLA	Mou, Guobin,et al."FERMI BUBBLES INFLATED BY WINDS LAUNCHED FROM THE HOT ACCRETION FLOW IN SGR A*".http://dx.doi.org/10.1088/0004-637X/790/2/109 (2014).