Fermi large area telescope detection of a break in the gamma-ray spectrum of the supernova remnant Cassiopeia A
Abstract
We report on observations of the supernova remnant Cassiopeia A in the energy range from 100 MeV to 100 GeV using 44 months of observations from the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope. We perform a detailed spectral analysis of this source and report on a low-energy break in the spectrum at 1.72{sub −0.89}{sup +1.35} GeV. By comparing the results with models for the gamma-ray emission, we find that hadronic emission is preferred for the GeV energy range.
- Authors:
-
- W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States)
- Science Institute, University of Iceland, IS-107 Reykjavik (Iceland)
- 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501 (Japan)
- Publication Date:
- OSTI Identifier:
- 22348453
- Resource Type:
- Journal Article
- Journal Name:
- Astrophysical Journal
- Additional Journal Information:
- Journal Volume: 779; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; ACCELERATION; COMPARATIVE EVALUATIONS; DETECTION; EMISSION; GAMMA RADIATION; GAMMA SPECTRA; GEV RANGE; MEV RANGE 100-1000; SPACE; SUPERNOVA REMNANTS; SUPERNOVAE; TELESCOPES
Citation Formats
Yuan, Yajie, Funk, Stefan, Lande, Joshua, Tibaldo, Luigi, Jóhannesson, Gülauger, and Uchiyama, Yasunobu. Fermi large area telescope detection of a break in the gamma-ray spectrum of the supernova remnant Cassiopeia A. United States: N. p., 2013.
Web. doi:10.1088/0004-637X/779/2/117.
Yuan, Yajie, Funk, Stefan, Lande, Joshua, Tibaldo, Luigi, Jóhannesson, Gülauger, & Uchiyama, Yasunobu. Fermi large area telescope detection of a break in the gamma-ray spectrum of the supernova remnant Cassiopeia A. United States. https://doi.org/10.1088/0004-637X/779/2/117
Yuan, Yajie, Funk, Stefan, Lande, Joshua, Tibaldo, Luigi, Jóhannesson, Gülauger, and Uchiyama, Yasunobu. 2013.
"Fermi large area telescope detection of a break in the gamma-ray spectrum of the supernova remnant Cassiopeia A". United States. https://doi.org/10.1088/0004-637X/779/2/117.
@article{osti_22348453,
title = {Fermi large area telescope detection of a break in the gamma-ray spectrum of the supernova remnant Cassiopeia A},
author = {Yuan, Yajie and Funk, Stefan and Lande, Joshua and Tibaldo, Luigi and Jóhannesson, Gülauger and Uchiyama, Yasunobu},
abstractNote = {We report on observations of the supernova remnant Cassiopeia A in the energy range from 100 MeV to 100 GeV using 44 months of observations from the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope. We perform a detailed spectral analysis of this source and report on a low-energy break in the spectrum at 1.72{sub −0.89}{sup +1.35} GeV. By comparing the results with models for the gamma-ray emission, we find that hadronic emission is preferred for the GeV energy range.},
doi = {10.1088/0004-637X/779/2/117},
url = {https://www.osti.gov/biblio/22348453},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 2,
volume = 779,
place = {United States},
year = {Fri Dec 20 00:00:00 EST 2013},
month = {Fri Dec 20 00:00:00 EST 2013}
}
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Works referencing / citing this record:
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text, January 2017
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