From the July 2009 issue

Could the nearby star Sirius B explode as a type Ia supernova, like some other white dwarf stars in binary star systems have?

Bruce Mason, Encinitas, California
By | Published: July 27, 2009 | Last updated on May 18, 2023
September 2009 supernova
A type Ia supernova occurs when a white dwarf star draws mass from a close companion star. When the dwarf’s mass exceeds a critical threshold, it collapses and explodes in a thermonuclear detonation. For mass to transfer, the gap between the stars must be relatively narrow.
Astronomy: Roen Kelly

Sirius B is not close enough to its companion to accrete hydrogen and reach the supernova threshold of 1.4 solar masses.