(FermiFermi)/LAT study of gamma-ray emission in the direction of the Monoceros Loop supernova remnant

Journal Article · Tue Nov 01 00:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/831/1/106· OSTI ID:22868514

Katagiri, H.; Sugiyama, S. ^[1]; Ackermann, M. ^[2]; Ballet, J.; Casandjian, J. M. ^[3]; Hanabata, Y. ^[4]; Hewitt, J. W. ^[5]; Kerr, M. ^[6]; Kubo, H. ^[7]; Lemoine-Goumard, M. ^[8]

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1. College of Science, Ibaraki University, 2-1-1 Bunkyo, Mito, Ibaraki 310-8512 (Japan)
2. Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen (Germany)
3. Laboratoire AIM, CEA-IRFU/CNRS/Université Paris Diderot, Service d’Astrophysique, CEA Saclay, F-91191 Gif sur Yvette (France)
4. Institute for Cosmic-Ray Research, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8582 (Japan)
5. University of North Florida, Department of Physics, 1 UNF Drive, Jacksonville, FL 32224 (United States)
6. CSIRO Astronomy and Space Science, Australia Telescope National Facility, Epping NSW 1710 (Australia)
7. Department of Physics, Graduate School of Science, Kyoto University, Kyoto (Japan)
8. Centre d’Études Nucléaires de Bordeaux Gradignan, IN2P3/CNRS, Université Bordeaux 1, BP120, F-33175 Gradignan Cedex (France)

We present an analysis of the gamma-ray measurements by the Large Area Telescope on board the Fermi Gamma-ray Space Telescope in the region of the supernova remnant (SNR) Monoceros Loop (G205.5+0.5). The brightest gamma-ray peak is spatially correlated with the Rosette Nebula, which is a molecular cloud complex adjacent to the southeast edge of the SNR. After subtraction of this emission by spatial modeling, the gamma-ray emission from the SNR emerges, which is extended and fit by a Gaussian spatial template. The gamma-ray spectra are significantly better reproduced by a curved shape than a simple power law. The luminosities between 0.2 and 300 GeV are ∼4×10{sup 34} erg s{sup −1} for the SNR and ∼3×10{sup 34} erg s{sup −1} for the Rosette Nebula, respectively. We argue that the gamma-rays likely originate from the interactions of particles accelerated in the SNR. The decay of neutral pions produced in nucleon–nucleon interactions of accelerated hadrons with interstellar gas provides a reasonable explanation for the gamma-ray emission of both the Rosette Nebula and the Monoceros SNR.

• OSTI ID: 22868514
• Journal Information: Astrophysical Journal, Vol. 831, Issue 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ACCELERATION
COMPUTERIZED SIMULATION
COSMIC RADIATION
DECAY
EMISSION
GAMMA RADIATION
GEV RANGE 100-1000
INTERACTIONS
LUMINOSITY
NEBULAE
NUCLEON-NUCLEON INTERACTIONS
PIONS NEUTRAL
SPACE
SUPERNOVA REMNANTS
TELESCOPES