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

Abstract

We present results of the Galactic supernova remnant (SNR) G355.6–0.0 observed with Suzaku. We resolved 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 × 1022 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 × 1022 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.