Radiative regimes in gamma-ray bursts and afterglows

A. Panaitescu, P. Mészáros

Research output: Contribution to journalArticlepeer-review

49 Scopus citations


We present numerical simulations of gamma-ray bursts arising from external shocks in the impulsive and wind models, including a weak or a strong coupling between electrons and protons plus magnetic fields, and analyze the burst features in each scenario. We follow the dynamics of the ejecta and external medium into the late stages of deceleration in order to study the hydrodynamics of the remnant and the temporal and spectral evolution of the afterglow. A brief comparison with the optical and radio afterglows of GRB 970228 and GRB 970508 is made.

Original languageEnglish (US)
Pages (from-to)772-779
Number of pages8
JournalAstrophysical Journal
Issue number2 PART 1
StatePublished - Jul 10 1998

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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