Since the Type Ia supernova form from the collapse of a stellar core of a particular mass, rather than the range of core masses possible for the other types of supernova, the Type Ia supernova are expected to have the same luminosity. (astronomynotes.com)
If the core mass is between 1.4 and 3 solar masses, the compression from the star's gravity will be so great the protons fuse with the electrons to form neutrons. (astronomynotes.com)
The riddle posed by super-Earths (1 — 4 Earth radii, 2 — 20 Earth masses) is that they are not Jupiters: their core masses are large enough to trigger runaway gas accretion, yet somehow super-Earths accreted atmospheres that weigh only a few percent of their total mass. (eos-nexus.org)