Afterglows from jetted gamma-ray bursts are generally believed to be characterized by an obvious break in the light curve at the relativistic stage.We show that it is not the case.However,an obvious break does exist a...Afterglows from jetted gamma-ray bursts are generally believed to be characterized by an obvious break in the light curve at the relativistic stage.We show that it is not the case.However,an obvious break does exist at the transition from the relativistic phase to the non-relativistic phase.Although this break itself is parameter dependent,afterglows from jetted remnant are uniformly characterized by a quick decay during the non-relativistic phase.展开更多
Conventional dynamic model of gamma-ray burst remnants is found to be incorrect for adiabatic blastwaves during the non-relativistic phase.A new model is derived,which is shown to be correct for both radiative and adi...Conventional dynamic model of gamma-ray burst remnants is found to be incorrect for adiabatic blastwaves during the non-relativistic phase.A new model is derived,which is shown to be correct for both radiative and adiabatic blastwaves during both ultra-relativistic and non-relativistic phases.Our model also takes the evolution of the radiative efficiency into account.The importance of the transition from the ultra-relativistic phase to the non-relativistic phase is stressed.展开更多
Softγ-ray repeaters are at determined distances and their positions are known accurately.If observed,afterglows from their softγ-ray bursts will provide important clues to the study of the so called“classicalγ-ray...Softγ-ray repeaters are at determined distances and their positions are known accurately.If observed,afterglows from their softγ-ray bursts will provide important clues to the study of the so called“classicalγ-ray bursts”.On applying the popular fireball/blastwave model of classicalγ-ray bursts to softγ-ray repeaters,it is found that their x-ray and optical afterglows are detectable.Monitoring of the three repeaters is solicited.展开更多
The strong electric field near the surface of a strange star is discussed,and its supporting interaction to the normal nuclear crust is calculated by using a self-consistent method.It is proved that the crust would be...The strong electric field near the surface of a strange star is discussed,and its supporting interaction to the normal nuclear crust is calculated by using a self-consistent method.It is proved that the crust would begin not to be supported by this electric field at a quite low density at the crust base,much lower than the previously assumed neutron drip density.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos.19773007 and 19825109,and the National Climbing Project on Fundamentai Researches.
文摘Afterglows from jetted gamma-ray bursts are generally believed to be characterized by an obvious break in the light curve at the relativistic stage.We show that it is not the case.However,an obvious break does exist at the transition from the relativistic phase to the non-relativistic phase.Although this break itself is parameter dependent,afterglows from jetted remnant are uniformly characterized by a quick decay during the non-relativistic phase.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19773007 and 19825109the National Climbing Project on Fundamental Researches.
文摘Conventional dynamic model of gamma-ray burst remnants is found to be incorrect for adiabatic blastwaves during the non-relativistic phase.A new model is derived,which is shown to be correct for both radiative and adiabatic blastwaves during both ultra-relativistic and non-relativistic phases.Our model also takes the evolution of the radiative efficiency into account.The importance of the transition from the ultra-relativistic phase to the non-relativistic phase is stressed.
基金Supported by the National Natural Science Foundation of China under Grant Nos.19573006 and 19773007the Foundation of the National Education Commit tee of China.
文摘Softγ-ray repeaters are at determined distances and their positions are known accurately.If observed,afterglows from their softγ-ray bursts will provide important clues to the study of the so called“classicalγ-ray bursts”.On applying the popular fireball/blastwave model of classicalγ-ray bursts to softγ-ray repeaters,it is found that their x-ray and optical afterglows are detectable.Monitoring of the three repeaters is solicited.
基金Supported by the National Climbing Programme on Fundamental Researchesthe National Natural Science Foundation of Chinathe Foundation of the National Education Commit tee of China.
文摘The strong electric field near the surface of a strange star is discussed,and its supporting interaction to the normal nuclear crust is calculated by using a self-consistent method.It is proved that the crust would begin not to be supported by this electric field at a quite low density at the crust base,much lower than the previously assumed neutron drip density.
