The extremely high peak energy of GRB 110721A in the context of a dissipative photosphere synchrotron emission model

Péter Veres, Bin Bin Zhang, Péter Mészáros

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21 Scopus citations

Abstract

The Fermi observations of GRB 110721A have revealed an unusually high peak energy ∼15 MeV in the first time bin of the prompt emission. We find that an interpretation is unlikely in terms of internal shock models, and confirm that a standard blackbody photospheric model also falls short. On the other hand, we show that dissipative photospheric synchrotron models ranging from extreme magnetically dominated to baryon dominated dynamics are able to accommodate such high peak values.

Original languageEnglish (US)
Article numberL18
JournalAstrophysical Journal Letters
Volume761
Issue number2
DOIs
StatePublished - Dec 20 2012

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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