Journal
ASTROPHYSICAL JOURNAL
Volume 746, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/746/2/164
Keywords
acceleration of particles; gamma-ray burst: general; gamma rays: general; radiation mechanisms: non-thermal; turbulence
Categories
Funding
- JSPS
- CCAPP
- PSU
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [22740117]
- NASA [NNX08AL40G]
- NSF [PHY-0757155]
- Direct For Mathematical & Physical Scien
- Division Of Physics [757155] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [22740117] Funding Source: KAKEN
- NASA [99071, NNX08AL40G] Funding Source: Federal RePORTER
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We study effects of particle re-acceleration (or heating) in the post-shock region via magnetohydrodynamic/plasma turbulence, in the context of a mixed hadronic-leptonic model for the prompt emission of gamma-ray bursts, using both analytical and numerical methods. We show that stochastically accelerated (or heated) leptons, which are injected via pp and p. reactions and subsequent pair cascades, are plausibly able to reproduce the Band function spectra with a similar to 1 and beta similar to 2-3 in the similar to MeV range. An additional hard component coming from the proton-induced cascade emission is simultaneously expected, which can be compatible with observed extra power-law spectra far above the MeV range. We also discuss the specific implications of hadronic models for ongoing high-energy neutrino observations.
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