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.

This limit marks the mass at which a star can undergo a thermonuclear explosion, creating a Type Ia supernova.