Suzaku study of centrally brightened supernova remnant G272.2-3.2

TL;DR

This Suzaku study of supernova remnant G272.2-3.2 reveals ejecta-origin X-ray emission, indicating a Type Ia supernova origin with centrally peaked brightness and specific plasma properties.

Contribution

First detailed Suzaku X-ray analysis of G272.2-3.2 revealing ejecta composition and supernova type, with plasma parameters and remnant age estimation.

Findings

Ejecta origin confirmed by enhanced Si, S, Ca, Fe, Ni abundances.

Remnant age estimated at approximately 4300 years.

X-ray emission consistent with a Type Ia supernova explosion.

Abstract

In this work, the results from Suzaku observation of Galactic supernova remnant G272.2-3.2 are presented. Spectra of G272.2-3.2 are well fitted by a single-temperature variable abundances non-equilibrium ionization (VNEI) model with an electron temperature kTe \sim 0.77 keV, ionization timescale {\tau} \sim 6.5 \times 10^10 cm-3 s and absorbing column density NH \sim 1.1 \times 10^22 cm-2. We have detected enhanced abundances of Si, S, Ca, Fe and Ni in the center region indicating that the X-ray emission has ejecta origin. We estimated the electron density ne to be \sim0.48f^-1/2 cm-3, age \sim4300f^1/2 yr and the X-ray total mass Mx = 475f^1/2 M by taking the distance to be d=10 kpc. To understand the origin of the centrally-peaked X-ray emission of the remnant, we studied radial variations of the electron temperature and surface brightness. The relative abundances in the center region suggest that G272.2-3.2 is the result of a Type Ia supernova explosion.