Temporal evolution of GRB spectra: Leptonic and hadronic

Katsuaki Asano, Peter Mészáros

Research output: Chapter in Book/Report/Conference proceedingConference contribution


As the Fermi observatory has revealed, the GRB light curves show variant behaviours in different energy bands. Especially, the onset of GeV emission tend to lag that at lower energy. Various models to explain the GeV-delay, including early afterglow models or hadronic models, have been proposed. We have developed a time-dependent code for emission processes with one-zone approximation. The temporal evolution of GRB spectra is discussed based on leptonic inverse Compton and hadronic cascade models. This offers important predictions for future observations such as CTA.

Original languageEnglish (US)
Title of host publicationDeath of Massive Stars
Subtitle of host publicationSupernovae and Gamma-Ray Bursts
EditorsPeter W. A. San Antonio, Nobuyuki Kawai, Elena Pian
Number of pages2
StatePublished - Apr 2011

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221

All Science Journal Classification (ASJC) codes

  • Medicine (miscellaneous)
  • Astronomy and Astrophysics
  • Nutrition and Dietetics
  • Public Health, Environmental and Occupational Health
  • Space and Planetary Science


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