Katagiri, H.;
Sugiyama, S.;
Ackermann, M.;
Ballet, J.;
Casandjian, J. M.;
Hanabata, Y.;
Hewitt, J. W.;
Kerr, M.;
Kubo, H.;
Lemoine-Goumard, M.;
Ray, P. S.
FERMI/LAT STUDY OF GAMMA-RAY EMISSION IN THE DIRECTION OF THE MONOCEROS LOOP SUPERNOVA REMNANT
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Medientyp:
E-Artikel
Titel:
FERMI/LAT STUDY OF GAMMA-RAY EMISSION IN THE DIRECTION OF THE MONOCEROS LOOP SUPERNOVA REMNANT
Beteiligte:
Katagiri, H.;
Sugiyama, S.;
Ackermann, M.;
Ballet, J.;
Casandjian, J. M.;
Hanabata, Y.;
Hewitt, J. W.;
Kerr, M.;
Kubo, H.;
Lemoine-Goumard, M.;
Ray, P. S.
Erschienen:
American Astronomical Society, 2016
Erschienen in:
The Astrophysical Journal, 831 (2016) 1, Seite 106
Beschreibung:
ABSTRACT 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 erg s−1 for the SNR and erg s−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.