This limit marks the mass at which a star can undergo a thermonuclear explosion ... wave is drawing to the close of its free expansion. This marks the beginning of a period in supernova remnant ...

It is assumed that MC SNR J0519–6902 is a result of a type Ia supernova explosion and the mass of the progenitor star is estimated to be between 1.2 and 4.0 solar masses.

"Thanks to the high resolution of our new images, we detected a faint structure on the northeast side of this supernova remnant that had not been observed before." ...