Abstract
In this paper we investigate the variability of the gamma ray burst light curve. It is generally known that this fluctuation arise in the second phase of a GRB event, when two shock waves of different Lorentz factors collide. This is so called internal shock scenario. We have developed a simple model which includes dynamical and radiating part, to simulate shock wave evolution and collision. By specifying the model parameters, we show that this scenario could be used to describe variability of GRB light curve. We then use the model to simulate peeks in several different long GRB events from the BATSE database, which show us that some of the basic parameters have a very narrow range of values.
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References
Beloborodov, A.M.: On the efficiency of internal shocks in gamma-ray bursts. Astrophys. J. Lett. 539, L25–L28 (2000)
Blandford, R.D., McKee, C.F.: Fluid dynamics of relativistic blast waves. Phys. Fluids 19, 1130–1138 (1976)
Hjorth, J.: A very energetic supernova associated with the γ-ray burst of 29 March 2003. Nature 423, 847–850 (2003)
Huang, Y.F., Dai, Z.G., Lu, T.: A generic dynamical model of gamma-ray burst remnants. Mon. Not. Roy. Astron. Soc. 309, 513–516 (1999)
Huang, Y.F., Dai, Z.G., Lu, T.: Rapid fading of optical afterglows as evidence for beaming in gamma-ray bursts. Astron. Astrophys. Lett. 355, L43–L46 (2000a)
Huang, Y.F., Gou, L.J., Dai, Z.G., Lu, T.: Overall evolution of jetted gamma-ray burst ejecta. Astrophys. J. 543, 90–96 (2000b)
Kazanas, D., Georganopoulos, M., Mastichiadis, A.: The “supercritical pile” model of GRB: thresholds, polarization, time lags. In: Fenimore, E.E., Galassi, M. (eds.) Gamma-Ray Bursts: 30 Years of Discovery, Santa Fe, New Mexico, 8–12 September 2003, pp. 294–297. AIPC, Melville (2004)
Kobayashi, S., Piran, T., Sari, R.: Can internal shocks produce the variability in gamma-ray bursts?. Astrophys. J. 490, 92 (1997)
Nakar, E., Piran, T.: Gamma-ray burst light curves—another clue on the inner engine. Astrophys. J. 572, L139–L142 (2002)
Norris, J.P., Nemiroff, R.J., Bonnell, J.T.: Attributes of pulses in long bright gamma-ray bursts. Astrophys. J. 459, 393 (1996)
Paczynski, B.: Are gamma-ray bursts in star-forming regions?. Astrophys. J. Lett. 494, L45 (1998)
Piran, T.: The physics of gamma-ray bursts. Rev. Mod. Phys. 76, 1143–1210 (2005)
Rybicki, G.B., Lightman, A.P.: Radiative Processes in Astrophysics. Wiley, New York (1979)
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Simić, S., Popović, L.Č., Andersen, M.I. et al. Mechanism of light curve variability in the gamma ray bursts. Astrophys Space Sci 309, 173–177 (2007). https://doi.org/10.1007/s10509-007-9470-3
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DOI: https://doi.org/10.1007/s10509-007-9470-3