FERMI/LAT STUDY of GAMMA-RAY EMISSION in the DIRECTION of the MONOCEROS LOOP SUPERNOVA REMNANT
Document Type
Article
Publication Date
11-1-2016
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.
Publication Title
Astrophysical Journal
Volume
831
Issue
1
Digital Object Identifier (DOI)
10.3847/0004-637X/831/1/106
ISSN
0004637X
E-ISSN
15384357
Citation Information
Katagiri, Sugiyama, S., Ackermann, M., Ballet, J., Casandjian, J. M., Hanabata, Y., Hewitt, J. W., Kerr, M., Kubo, H., Lemoine-Goumard, M., & Ray, P. S. (2016). (Fermi Fermi)/LAT study of gamma-ray emission in the direction of the Monoceros Loop supernova remnant. The Astrophysical Journal, 831(1), 106.