What is the approximate mass limit that a white dwarf must breach via accretion to trigger a Type Ia event?

Answer

Approximately 1.4 times the mass of the Sun.

The critical mass threshold that triggers the thermonuclear runaway in a white dwarf is known as the Chandrasekhar limit, which is about 1.4 times the mass of the Sun. Breaching this limit leads directly to the explosion.

What is the approximate mass limit that a white dwarf must breach via accretion to trigger a Type Ia event?
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