2003A&A...406..141V

The X-ray emission from the supernova remnant DEM L71 is measured and analysed using the high-resolution cameras and spectrometers on board XMM-Newton. The spectrum from the outer shell is reproduced very well by two plasma components of kT_e=0.3 and 0.8keV. The abundance value from this shell is consistent with the average LMC values. More extreme temperature variations are possibly indicated by spatial variations in the OVII forbidden/resonance line ratio, which could imply that in some regions the plasma is cooling dramatically and recombining. However, an alternative and equally interesting possibility is that the variation in forbidden/resonance ratios is due to resonant scattering, which would reduce resonance line emission along lines of sight with a high OVII column density. The inner region is hotter (kT_e=1.1keV) and shows enhanced Fe and Si abundances. We estimate the Fe and Si ejecta mass to be 0.7-1.1M_☉ and 0.1-0.15M_☉, respectively. The morphology, mass estimates and abundances strongly suggest that DEM L71 is the result of a type Ia explosion, as indicated by previous measurements.