%0 Journal Article %T Fermi/LAT Study of Gamma-Ray Emission in the Direction of the Monoceros Loop Supernova Remnant %+ Astrophysique Interprétation Modélisation (AIM (UMR_7158 / UMR_E_9005 / UM_112)) %+ Université de Bordeaux (UB) %A Katagiri, H. %A Sugiyama, S. %A Ackermann, M. %A Ballet, J. %A Casandjian, J. M. %A Hanabata, Y. %A Hewitt, J. W. %A Kerr, M. %A Kubo, H. %A Lemoine-Goumard, M. %A Ray, P. S. %< avec comité de lecture %@ 0004-637X %J The Astrophysical Journal %I American Astronomical Society %V 831 %8 2016 %D 2016 %Z 1608.06380 %Z 2016ApJ...831..106K %R 10.3847/0004-637X/831/1/106 %K acceleration of particles %K cosmic rays %K gamma-rays: ISM %K ISM: individual objects: the Monoceros Loop %K ISM: supernova remnants %K Astrophysics - High Energy Astrophysical Phenomena %Z Sciences of the Universe [physics] %Z Sciences of the Universe [physics]/Astrophysics [astro-ph]Journal articles %X 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}34 erg s-1 for the SNR and ∼ 3× {10}34 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. %G English %L insu-03746215 %U https://insu.hal.science/insu-03746215 %~ CEA %~ INSU %~ CNRS %~ CEA-UPSAY %~ UNIV-PARIS-SACLAY %~ CEA-UPSAY-SACLAY %~ UP-SCIENCES