摘要
A star-quake model is proposed to understand X-ray flares of both long and shortγ-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.
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)
