Katsuaki Asano et al 2009 ApJ 705 L191 doi:10.1088/0004-637X/705/2/L191
Katsuaki Asano1, Sylvain Guiriec2 and Peter Mészáros3
Show affiliationsA short gamma-ray burst GRB 090510 detected by Fermi shows an extra spectral component between 10 MeV and 30 GeV, an addition to a more usual low-energy (<10 MeV) Band component. In general, such an extra component could originate from accelerated protons. In particular, inverse Compton emission from secondary electron-positron pairs and proton synchrotron emission are competitive models for reproducing the hard spectrum of the extra component in GRB 090510. Here, using Monte Carlo simulations, we test the hadronic scenarios against the observed properties. To reproduce the extra component around GeV with these models, the proton injection isotropic-equivalent luminosity is required to be larger than 1055 erg s–1. Such large proton luminosities are a challenge for the hadronic models.
cosmic rays; gamma rays: bursts; gamma rays: theory; radiation mechanisms: non-thermal
98.70.Rz &ggr;-ray sources; &ggr;-ray bursts
95.30.Cq Elementary particle processes
98.70.Sa Cosmic rays (including sources, origin, acceleration, and interactions)
Issue 2 (2009 November 10)
Received 2009 September 2, accepted for publication 2009 October 9
Published 2009 October 22
Katsuaki Asano et al 2009 ApJ 705 L191
R Lambiotte and S Redner J. Stat. Mech. (2007) L10001
Joshua N. Winn et al. 2007 ApJ 657 1098
N. Lehner et al 2001 ApJ 556 L103
Joachim D Pleil et al 2008 J. Breath Res. 2 026001
P.-E. Roche and C. F. Barenghi 2008 EPL 81 36002
D A Walker et al 2009 Environ. Res. Lett. 4 045004
Richard M. Williamon et al. 2004 The Astronomical Journal 128 1319
M A Tagliente et al 2003 J. Phys. D: Appl. Phys. 36 A192
Y Y Biton and S A Safran 2009 Phys. Biol. 6 046010