Morphology Study for GeV Emission of the Nearby Supernova Remnant G332.5-5.6

TL;DR

This paper investigates the gamma-ray morphology of the supernova remnant G332.5-5.6, proposing a Gaussian disk model that reveals significant variability and can be explained by leptonic or hadronic emission models.

Contribution

It introduces a new Gaussian disk spatial template for gamma-ray analysis of SNR G332.5-5.6 and demonstrates its effectiveness in modeling variability and emission mechanisms.

Findings

Gaussian disk with 1.06° radius fits gamma-ray data well

Detected significant gamma-ray variability (~7 sigma)

Both leptonic and hadronic models explain observations

Abstract

Spatial template is important to study the nearby supernova remnant (SNR). For SNR G332.5-5.6, we report a gaussian disk with radius of about 1.06 degrees to be a potential good spatial model in the gamma-ray band. Employing this new gaussian disk, its GeV lightcurve shows a significant variability of about 7 sigma. The $\gamma$-ray observations of this SNR could be explained well either by a leptonic model or a hadronic model, in which a flat spectrum for the ejected electrons/protons.