X-ray flares of γ-ray bursts: Quakes of solid quark stars?  

作　　者：XU RenXin1 & LIANG EnWei2 1 School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China 2 Department of Physics, Guangxi University, Nanning 530004, China 

出　　处：《Science China(Physics,Mechanics & Astronomy)》2009年第2期315-320,共6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. 10573002, 10778611, and 10873002); the National Basic Research Program of China (Grant No. 2009CB824800);the Research Foundation of Guangxi University (Grant No. M30520);the LCWR (Grant No. LHXZ200602)

摘　　要：A star-quake model is proposed to understand X-ray flares of both long and short γ-ray bursts (GRBs) in a solid quark star regime. Two kinds of central engines for GRBs are available if pulsar-like stars are actually (solid) quark stars, i.e., the SNE-type GRBs and the SGR-type GRBs. It is found that a quark star could be solidified about 103 to 106 s later after its birth if the critical temperature of phase transi- tion is a few Metga-electron-volts, and then a new source of free energy (i.e., elastic and gravitational ones, rather than rotational or magnetic energy) could be possible to power GRB X-ray flares.A star-quake model is proposed to understand X-ray flares of both long and short γ-ray bursts (GRBs) in a solid quark star regime. Two kinds of central engines for GRBs are available if pulsar-like stars are actually (solid) quark stars, i.e., the SNE-type GRBs and the SGR-type GRBs. It is found that a quark star could be solidified about 103 to 106 s later after its birth if the critical temperature of phase transition is a few Metga-electron-volts, and then a new source of free energy (i.e., elastic and gravitational ones, rather than rotational or magnetic energy) could be possible to power GRB X-ray flares.

关 键 词：γ-rays bursts: X-rays NEUTRON STARS ELEMENTARY PARTICLES 

分 类 号：P142[天文地球—天体物理]