A toy model for magnetized neutrino-dominated accretion flows  

作　　者：LEI WeiHua,WANG DingXiong,ZHANG Lei,GAN ZhaoMing & ZOU YuanChuan School of Physics,Huazhong University of Science and Technology,Wuhan 430074,China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2010年第S1期98-101,共4页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 10873005,10847127,and 10703002);the Research Fund for the Doctoral Program of Higher Education (Grant No. 200804870050);the National Basic Research Program of China (Grant No. 2009CB824800)

摘　　要：In this paper,we present a simplified model for a magnetized neutrino-dominated accretion flow(NDAF) in which the effect of black hole(BH) spin is taken into account by adopting a set of relativistic correction factors,and the magnetic field is parameterized as β,the ratio of the magnetic pressure to the total pressure.It is found that the disc properties are sensitive to the values of the BH spin and β,and more energy can be extracted from NDAFs by using a faster spin and lower β.In this paper,we present a simplified model for a magnetized neutrino-dominated accretion flow(NDAF) in which the effect of black hole(BH) spin is taken into account by adopting a set of relativistic correction factors,and the magnetic field is parameterized as β,the ratio of the magnetic pressure to the total pressure.It is found that the disc properties are sensitive to the values of the BH spin and β,and more energy can be extracted from NDAFs by using a faster spin and lower β.

关 键 词：black hole GAMMA-RAY BURSTS ACCRETION DISC magnetic field 

分 类 号：P145.8[天文地球—天体物理]