Ignition of neutrino-dominated accretion disks  

作　　者：LIU Tong XUE Li 

机构地区：[1]Department of Physics and Institute of Theoretical Physics and Astrophysics,Xiamen University,Xiamen 361005,China

出　　处：《Science China(Physics,Mechanics & Astronomy)》2012年第2期316-319,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Basic Research Program of China (Grant No.2009CB824800);the National Natural Science Foundation of China (Grant Nos.10833002,11003016,11073015 and 11103015);the Natural Science Foundation of Fujian Province of China (Grant No.2010J01017)

摘　　要：The vertical structure of neutrino-dominated accretion flows （NDAFs） in spherical coordinates is revisited. We define the ratio of the neutrino cooling rate to the viscous heating rate per unit volume, f=-qJqvis. The ignition region is presented when f〉0.5. The solutions show that NDAF is significantly thick. The ignition region is determined by the mass accretion rate and the vis- cosity parameter, which can be considered as the neutrino radiation-dominated region.The vertical structure of neutrino-dominated accretion flows (NDAFs) in spherical coordinates is revisited.We define the ratio of the neutrino cooling rate to the viscous heating rate per unit volume,f=q v/q vis.The ignition region is presented when f >0.5.The solutions show that NDAF is significantly thick.The ignition region is determined by the mass accretion rate and the viscosity parameter,which can be considered as the neutrino radiation-dominated region.

关 键 词：ACCRETION accretion disks-black hole physics-gamma rays： bursts 

分 类 号：TQ051.5[化学工程] O572.321[理学—粒子物理与原子核物理]