Title

FERMI/LAT STUDY of GAMMA-RAY EMISSION in the DIRECTION of the MONOCEROS LOOP SUPERNOVA REMNANT

Document Type

Article

Publication Date

11-1-2016

Subject Area

ARRAY(0x55ba1a6eb7b8)

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

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