Possibility of Ultra High-Energy Cosmic Rays from the Giant Flare in SGR 1806-20

Details Possibility of Ultra High-Energy Cosmic Rays from the Giant Flare in SGR 1806-20 Possibility of Ultra High-Energy Cosmic Rays from the Giant Flare in SGR 1806-20

2005-03-16

arxiv.org/abs/astro-ph/0503335v4

Publ.Astron.Soc.Jap. 58 (2006) L7-L10

Astronomy and Astrophysics

Astrophysics

8 pages, 2figures

Scientific paper

On 2004 December 27, a giant flare from the soft gamma repeater 1806$-$20 was observed. The radiation mechanism of the initial peak of the flare would be controversial. In this letter we point out that very high-energy cosmic rays would be produced in the case that the flare was caused by internal shocks, as is usually considered for gamma-ray bursts. The highest energy of cosmic rays can reach $10^{19}$ eV, if the Lorentz factor of the shocks is sufficiently high. Future observations of cosmic rays will inform us about the mechanism of the giant flare.

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