Fermi/LAT study of gamma-ray emission in the direction of the monceros loop supernova remnant
[3];
[6];
[7];
- Ibaraki Univ. (Japan). College of Science
- Deutsches Elektronen-Synchrotron (DESY), Zeuthen (Germany)
- Commission for Atomic Energy(CEA-IRFU), Saclay (France). Research Institute of the fundamental laws of the Universe French National Center for Scientific Research (CNRS) and Univ. of Paris (France)
- Univ. of Tokyo (Japan). Inst. for Cosmic Ray Research
- Univ. of North Florida, Jacksonville, FL (United States). Dept. of Physics
- Commonwealth Scientific and Industrial Research Organisation (CSIRO), Epping (Australia). Astronomy and Space Science
- Kyoto Univ. (Japan). Dept. of Physics
- Univ. of Bordeaux and CNRS/IN2P3 (France). Center for Nuclear Studies of Bordeaux Gradignan
- Naval Research Lab. (NRL), Washington, DC (United States). Space Science Division
Here, 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 $$\sim 4\times {10}^{34}$$ erg s-1 for the SNR and $$\sim 3\times {10}^{34}$$ erg s-1 for the Rosette Nebula, respectively. We also argue that the gamma-rays likely originate from the interactions of particles accelerated in the SNR. Furthermore, 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.
- Research Organization:
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- Sponsoring Organization:
- USDOE
- Grant/Contract Number:
- AC02-76SF00515
- OSTI ID:
- 1355712
- Journal Information:
- The Astrophysical Journal (Online), Vol. 831, Issue 1; ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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