Early afterglow from a reverse shock as a tracer of the prompt gamma-ray light curve

E. Nakar*, T. Piran

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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.

Original languageEnglish
Pages (from-to)431-434
Number of pages4
JournalNuovo Cimento della Societa Italiana di Fisica C
Volume28
Issue number3
DOIs
StatePublished - 2005
Externally publishedYes

Fingerprint

Dive into the research topics of 'Early afterglow from a reverse shock as a tracer of the prompt gamma-ray light curve'. Together they form a unique fingerprint.

Cite this