X-Ray Observation of the Galactic Supernova Remnant G355.6-0.0 with Suzaku

TL;DR

This study used Suzaku X-ray observations to analyze the supernova remnant G355.6-0.0, revealing its thermal plasma characteristics and confirming its classification as a mixed-morphology SNR, along with identifying a nearby X-ray source.

Contribution

First detailed Suzaku X-ray analysis of G355.6-0.0, confirming its mixed-morphology nature and distinguishing a nearby point source with spectral properties.

Findings

G355.6-0.0 exhibits center-filled X-ray morphology within radio shell.

X-ray spectrum indicates a thin thermal plasma with enhanced metals.

Identified Suzaku J173530-3236 as a nearby hard X-ray source with Fe emission.

Abstract

We present results of the Galactic supernova remnant (SNR) G355.6-0.0 observed with Suzaku. We resolved the diffuse emission detected with ASCA into two objects, G355.6-0.0 and a point-like source, Suzaku J173530-3236. The X-ray emission from G355.6-0.0 exhibits a center-filled morphology within the radio shell. The X-ray spectrum is well represented by a thin thermal plasma model with enhanced metal abundances. The spatial and spectral properties imply that G355.6-0.0 is a member of the mixed-morphology SNRs. The NH value of ~ 6 x 10^{22} cm^{-2} supports that G355.6-0.0 is a distant SNR. Suzaku J173530-3236 exhibits a hard X-ray spectrum with a strong Fe emission line, similar to those of cataclysmic variables. The NH value of ~ 3 x 10^{22} cm^{-2} is smaller than that of G355.6-0.0, and hence Suzaku J173530-3236 is located at the near side of G355.6-0.0.