What remnant, if any, is left after a Type Ia thermonuclear supernova explosion?

Answer

No remnant is left behind.

The mechanism driving a Type Ia supernova is fundamentally different from a core-collapse event, resulting in a total annihilation of the progenitor object. A Type Ia explosion results from a white dwarf exceeding the Chandrasekhar Limit ($1.4 M_{ extregistered extsuperscript{ extcircled}O}$), which triggers a runaway thermonuclear reaction that consumes the star's carbon and oxygen core. This explosion is so energetic and complete that it utterly obliterates the white dwarf entirely, leaving behind no dense core such as a neutron star or a black hole. This complete destruction is precisely why Type Ia supernovae serve as reliable 'standard candles' for astrophysics, as their consistent starting mass ensures consistent peak brightness.

What remnant, if any, is left after a Type Ia thermonuclear supernova explosion?

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