Nakar, E. and Piran, T. (2005) Early afterglow from a reverse shock as a tracer of the prompt gamma-ray light curve. Il nuovo cimento C, 28 (3). pp. 431-434. ISSN 1826-9885
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Abstract
We discuss the optical and radio early afterglow emission of the reverse shock that crosses a baryonic ejecta as it interacts with the external interstellar medium (ISM). We show that the peak of the optical flash divided the reverse shock light curve into two distinctive phases. The emission after the peak depends weakly on the initial conditions of the ejecta and therefore it can be used as an identifiable signature of a reverse shock emission. On the other hand, the emission before the optical peak is highly sensitive to the initial conditions and therefore can be used to investigate the initial hydrodynamic profile of the ejecta. In particular, if the prompt γ-ray emission results from internal shocks, the early reverse shock emission should resemble a smoothed version of the prompt γ-ray light curve.
| Item Type: | Article |
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| Additional Information: | aper presented at the “4th Workshop on Gamma-Ray Burst in the Afterglow Era”, Rome, October 18-22, 2004. |
| Uncontrolled Keywords: | γ-ray sources; γ-ray bursts ; Shock waves ; Hydrodynamics |
| Subjects: | 500 Scienze naturali e Matematica > 530 Fisica |
| Depositing User: | Marina Spanti |
| Date Deposited: | 16 Mar 2020 10:54 |
| Last Modified: | 16 Mar 2020 10:54 |
| URI: | http://eprints.bice.rm.cnr.it/id/eprint/15681 |
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