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Advanced filters: Author: Snehalata Sahu Clear advanced filters

A hot white dwarf merger remnant revealed by an ultraviolet detection of carbon

Ultraviolet observations of an ultra-massive white dwarf with the Hubble Space Telescope reveal small amounts of carbon on the surface, identifying it as a merger remnant.

Snehalata Sahu
Antoine Bédard
Seth Redfield
ResearchOpen Access06 Aug 2025
Nature Astronomy

Volume: 9, P: 1347-1355
A super-Chandrasekhar mass type Ia supernova progenitor at 49 pc set to detonate in 23 Gyr

This study reports the characterization of a double white dwarf that will explode as a type Ia supernova on our Galactic doorstep. Given that the source is so close, this event would outshine all stars in the sky, with an apparent magnitude of −16.

James Munday
Ruediger Pakmor
Tim Cunningham
ResearchOpen Access04 Apr 2025
Nature Astronomy

Volume: 9, P: 872-882

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A hot white dwarf merger remnant revealed by an ultraviolet detection of carbon

A super-Chandrasekhar mass type Ia supernova progenitor at 49 pc set to detonate in 23 Gyr

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