Search for the time evolution of the synchrotron X-ray spectrum of the youngest Galactic supernova remnant G1.9+0.3 using Suzaku

TL;DR

This study investigates the evolution of the synchrotron X-ray spectrum of the youngest Galactic supernova remnant G1.9+0.3 over time using Suzaku data, finding no significant spectral changes between 2011 and 2015.

Contribution

First analysis of the time evolution of G1.9+0.3's synchrotron spectrum using Suzaku observations from 2011 and 2015.

Findings

No significant change in spectral parameters over four years

Spectral stability suggests steady electron acceleration

Provides constraints on early SNR evolution models

Abstract

G1.9+0.3 is the youngest known Galactic supernova remnant (SNR) and dominated by X-ray synchrotron emission. Synchrotron X-rays can be a useful tool to study the electron acceleration in young SNRs. The X-ray spectra of young SNRs give us information about the particle acceleration at the early stages of evolution of SNRs. In this work, we investigate the time evolution of roll-off frequency of the synchrotron spectrum from SNR G1.9+0.3 using Suzaku. For this analysis, we use ~101 ks (2011) and ~92 ks (2015) observations with the X-ray Imaging Spectrometer. We find that there are no significant differences in the spectral parameters and interpret our results.