Type I supernova
Quick Summary
A Type I supernova is a stellar explosion that is brighter than a Type II supernova and lacks hydrogen lines in its spectrum. These supernovae expand about twice as rapidly as Type II supernovae.1
Type Ia supernovae, a subgroup of Type I, are thought to originate from binary systems involving a white dwarf star and a companion star. Material transferred from the companion star to the white dwarf can trigger a thermonuclear explosion if the white dwarf's mass exceeds the Chandrasekhar limit (approximately 1.4 solar masses), leading to the white dwarf's complete destruction. This process creates radioactive elements like nickel-56, which decay and release significant energy, contributing to the supernova's luminosity.123
Type Ia supernovae are valuable for measuring the expansion rate of the universe and were instrumental in the discovery of dark energy.1
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