X-Ray Emission from a Supernova Remnant, G344.7−0.1, Observed in the ASCA Galactic Plane Survey

Abstract

Abstract X-ray emission from a cataloged radio supernova remnant (SNR), G344.7$-$0.1, was observed in the ASCA Galactic Plane Survey. The X-ray image showed extended emission with a diameter of $6' \hbox{--} 8'$. The X-ray spectrum exhibited emission lines from He-like Si, S, Ar, and Ca, which indicates that the X-rays have a thermal plasma origin. The spectrum was represented by a thin thermal plasma model with a temperature of 0.7–0.8 keV. The model fit showed that S and Ca are overabundant relative to the solar values. In addition to the emission lines from highly ionized atoms, an emission line at an energy of $\sim 6.4 \,\mathrm{keV}$ was found. This line is attributable to a K transition line from low-ionized iron. The strong Fe-K$\alpha$ line may suggest the existence of an Fe-rich plasma.