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

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 τ \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.

7 pages, 4 figures

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• Suzaku study on the Ejecta of the Supernova Remnant G272.2$-$3.2
• XMM-Newton and Chandra observations of G272.2-3.2. Evidence of stellar ejecta in the central region
• A possible surviving companion of the SN Ia in the Galactic SNR G272.2-3.2
• Fe-rich ejecta in the supernova remnant G352.7-0.1 with Suzaku
• Fermi-LAT detection of GeV $\gamma$-ray emission from Type Ia supernova remnant G272.2-3.2