Very High Energy Emission From Supernovae and Supernova Remnants
The transport and acceleration of test particles in hydrodynamical simulations
Duffy, P.; Dwarkadas, V.; Ball, L.
Proceedings of the 27th International Cosmic Ray Conference. 07-15 August, 2001. Hamburg, Germany. Under the auspices of the International Union of Pure and Applied Physics (IUPAP)., p.2046
08/2001
Abstract
The interaction of supernovae with their surroundings has been studied with hydrodynamical codes which capture the shock waves produced when the ejecta interact with the medium close to the progenitor star. Observationally it is known that core-collapse supernovae, of which SN1987A and SN1993J are two well-studied examples, emit nonthermal radiation which is associated with electron acceleration at these shock waves. We present a model for the transport and acceleration of test particles in hydrodynamical simulations of young radio supernovae.
Observation of Extended Very High Energy Emission from the Supernova Remnant IC 443 with VERITAS
Acciari, V. A.; Aliu, E.; Arlen, T.; Aune, T.; Bautista, M.; Beilicke, M.; Benbow, W.; Bradbury, S. M.; Buckley, J. H.; Bugaev, V.; and 82 coauthors
The Astrophysical Journal Letters, Volume 698, Issue 2, pp. L133-L137 (2009).
06/2009
Origin:
Abstract
We present evidence that the very high energy (VHE, E > 100 GeV) gamma-ray emission coincident with the supernova remnant IC 443 is extended. IC 443 contains one of the best studied sites of supernova remnant/molecular cloud interaction and the pulsar wind nebula CXOU J061705.3+222127, both of which are important targets for VHE observations. VERITAS observed IC 443 for 37.9 hr during 2007 and detected emission above 300 GeV with an excess of 247 events, resulting in a significance of 8.3 standard deviations (σ) before trials and 7.5σ after trials in a point-source search. The emission is centered at 6h16m51s + 22°30'11'' (J2000) ±0fdg03stat ± 0fdg08sys, with an intrinsic extension of 0fdg16 ± 0fdg03stat ± 0fdg04sys. The VHE spectrum is well fit by a power law (dN/dE = N 0 × (E/TeV)-Γ) with a photon index of 2.99 ± 0.38stat ± 0.3sys and an integral flux above 300 GeV of (4.63 ± 0.90stat ± 0.93sys) × 10-12 cm-2 s-1. These results are discussed in the context of existing models for gamma-ray production in IC 443.