The Supernova Remnant G296.7-0.9 in X-rays

TL;DR

This study provides a detailed X-ray analysis of supernova remnant G296.7-0.9, revealing its physical parameters, age, and distance, while finding no evidence of an associated neutron star.

Contribution

First detailed X-ray spectro-imaging analysis of G296.7-0.9, determining its physical properties, age, and distance, and investigating neutron star association.

Findings

Remnant characterized by a bright arc in X-rays.

Spectral analysis indicates a plasma temperature of ~6.2 million Kelvin.

Estimated remnant age of 5800-7600 years and distance of ~9.8 kpc.

Abstract

Aims: We present a detailed study of the supernova remnant (SNR) G296.7-0.9 in the 0.2-12 keV X-ray band. Methods: Using data from XMM-Newton we performed a spectro-imaging analysis of G296.7-0.9 in order to deduce the basic parameters of the remnant and to search for evidence of a young neutron star associated with it. Results: In X-rays the remnant is characterized by a bright arc located in the south-west direction. Its X-ray spectrum can best be described by an absorbed non-equilibrium collisional plasma model with a hydrogen density of N_H=1.24_{-0.05}^{+0.07} x 10^{22} cm^{-2} and a plasma temperature of 6.2^{+0.9}_{-0.8} million Kelvin. The analysis revealed a remnant age of 5800 to 7600 years and a distance of 9.8_{-0.7}^{+1.1} kpc. The latter suggests a spatial connection with a close-by HII region. We did not find evidence for a young neutron star associated with the remnant.