A study of variable light curves of GRB

Details A study of variable light curves of GRB A study of variable light curves of GRB

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008acasn..49..267s&link_type=abstract

Acta Astronomica Sinica, vol. 49, no. 3, p. 267-272

Astronomy and Astrophysics

Astronomy

Gamma Rays: Bursts, Gamma Rays: Theory, Physical Data And Process: Relativity

Scientific paper

Most of GRB have a highly variable profile with time. It is believed generally that the observed prompt structure arise from the internal shocks which could occur when a rapid shell catches up a slower one and collide with it. The electrons within shock shell are heated by the shocks and internal energy is then radiated via synchrotron and inverse Compton scattering. Based on relativistic kinematics, a transform relation between the photon number of emission of shock shell which moves with ultra-relativistic speed and the photon number received by observer has been derived. Applying the angular spreading of internal shock's emission, the curve function and the profile of light pulse are obtained. The single pulse has a typical shape of fast rise exponential decay. At last, using the model of multiple collisions of consequent shells and reasonable parameters, the observed variable light curves of GRB are simulated and the better results are acquired. Therefore one can explain more kinds of light curves.

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