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EGRET Observations of Radio-bright Supernova Remnants
Abstract
The gamma-ray emission associated with radio-bright supernova remnants has been studied using data from the EGRET instrument aboard the Compton Gamma Ray Observatory. Five sources from The Second EGRET Catalog of High-Energy Gamma-Ray Sources are shown to be coincident with supernova remnants. The two strongest pointlike gamma-ray excesses which are coincident with supernova remnants are 2EG J2020+4026 with y Cyg and 2EG J0618+2234 with IC 443. The gamma-ray flux, E > 100 MeV, from the region of these two supernova remnants is (12.6±0.7) x 10-7 photons cm-2 s-1 and (5.0±0.4) x 10-7 photons cm-2 s-1, respectively. The differential gamma-ray flux of both supernova remnants is consistent with a single power law, F ∝ E-α, with α = 2.07±0.05 and 1.97±0.07 for γ Cyg and IC 443, respectively. A cosmic-ray origin model based on shock acceleration of cosmic rays is consistent with our results suggesting supernova remnants as an acceleration site, and possibly the origin, of Galactic cosmic rays. Other mechanisms to explain the possible gamma-ray emission from supernova remnants are also discussed in the context of the EGRET observations.
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Citations
Cited by
THE LARGE AREA TELESCOPE ON THE FERMI GAMMA-RAY SPACE TELESCOPE MISSION
Atwood, W. B., Abdo, A. A., Ackermann, M., Althouse, W., Anderson, B., Axelsson, M., Baldini, L., Ballet, J., Band, D. L., Barbiellini, G., et al. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/697/2/1071 · Cited by 4,198
Supernova Remnants in Molecular Clouds
Chevalier, R. A. (1999) · The Astrophysical Journal · doi:10.1086/306710 · Cited by 271
THE FIRST FERMI LAT SUPERNOVA REMNANT CATALOG
Acero, F., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Bastieri, D., Bellazzini, R., Bissaldi, E., Blandford, R. D., et al. (2016) · The Astrophysical Journal Supplement Series · doi:10.3847/0067-0049/224/1/8 · Cited by 265
FERMI LAT DISCOVERY OF EXTENDED GAMMA-RAY EMISSION IN THE DIRECTION OF SUPERNOVA REMNANT W51C
Abdo, A. A., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M. G., Bastieri, D., Baughman, B. M., Bechtol, K., et al. (2009) · The Astrophysical Journal · doi:10.1088/0004-637x/706/1/l1 · Cited by 259
Metadata
- Authors
- Esposito, J. A., Hunter, S. D., Kanbach, G., & Sreekumar, P.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1996-04
- Volume
- 461
- Pages
- 820
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2011678063
- Cited by
- 231
- References
- 0
- FWCI
- 11.90
- Type
- journal article
- Language
- en
- Open access
- closed
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- Esposito, J. A., Hunter, S. D., Kanbach, G., & Sreekumar, P. (1996). EGRET Observations of Radio-bright Supernova Remnants. The Astrophysical Journal. https://doi.org/10.1086/177104
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