Gravitational Instability in Neutrino Dominated Accretion Disks

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	Gravitational Instability in Neutrino Dominated Accretion Disks
	Liu Tong ; Xue Li ; Liu T(刘彤)
刊名	http://dx.doi.org/10.1088/0256-307X/28/12/129802
	2011-12
关键词	GAMMA-RAY BURSTS BLACK-HOLES MODELS
英文摘要	National Basic Research Program of China [2009CB824800]; National Natural Science Foundation of China [10833002, 11003016, 11073015, 11103015]; Natural Science Foundation of Fujian Province of China [2010J01017]; We revisit the vertical structure of neutrino-dominated accretion flows (NDAFs) in spherical coordinates under a boundary condition based on a mechanical equilibrium. The solutions show that the NDAF is significantly geometrically thick. The Toomre parameter is determined by the mass accretion rate and the viscosity parameter, which is defined as Q = c(S) Omega/pi G Sigma, where c(S), Omega and Sigma are the sound speed, angular velocity and surface density, respectively. According to the distribution of the Toomre parameter, the possible fragments of the disk may appear near the disk surface in the outer region. These possible outflows originating from the gravitational instability of the disk may account for the late-time flares in gamma-ray bursts.
语种	英语
出版者	CHINESE PHYS LETT
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/91628]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Liu Tong,Xue Li,Liu T. Gravitational Instability in Neutrino Dominated Accretion Disks[J]. http://dx.doi.org/10.1088/0256-307X/28/12/129802,2011.
APA	Liu Tong,Xue Li,&刘彤.(2011).Gravitational Instability in Neutrino Dominated Accretion Disks.http://dx.doi.org/10.1088/0256-307X/28/12/129802.
MLA	Liu Tong,et al."Gravitational Instability in Neutrino Dominated Accretion Disks".http://dx.doi.org/10.1088/0256-307X/28/12/129802 (2011).