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Title: 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:
; ; ;  [1];  [2];  [3]
  1. 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)
  2. Science Institute, University of Iceland, IS-107 Reykjavik (Iceland)
  3. 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}
}

Works referencing / citing this record:

A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A
text, January 2017


Is Supernova Remnant Cassiopeia A a PeVatron?
journal, March 2019


Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC
journal, August 2019


A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A
conference, August 2018


A cut-off in the TeV gamma-ray spectrum of the SNR Cassiopeia A
journal, August 2017


Measurement of the Crab Nebula Spectrum Past 100 TeV with HAWC
text, January 2019