2012MNRAS.421.3538S

In this paper, we present the results from a Suzaku observation of the Galactic supernova remnant G272.2-3.2. The spectra of G272.2-3.2 are well fitted by a single-temperature variable abundance non-equilibrium ionization (VNEI) model with an electron temperature kT_e ∼ 0.77 keV, an ionization time-scale τ ∼ 6.5 {x} 10¹⁰/cm3 s and an absorbing column density N_H ∼ 1.1 {x} 10²²/cm2. We have detected enhanced abundances of Si, S, Ca, Fe and Ni in the centre region, indicating that the X-ray emission has an ejecta origin. We estimate that the electron density is n_e ∼ 0.48f^–1/2/cm3, the age is ∼ 4300f^1/2 yr and the X-ray total mass is M_x= 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 have studied the radial variations of the electron temperature and surface brightness. The relative abundances in the centre region suggest that G272.2-3.2 is the result of a Type Ia supernova explosion.