Page "Chandrasekhar limit" Paragraph 31

Since the observation of the Champagne Supernova in 2003, more very bright type Ia supernovae are thought to have originated by white dwarfs whose masses exceeded the Chandrasekhar limit.

These include SN 2006gz, SN 2007if and SN 2009dc.

The super-Chandrasekhar mass white dwarfs that have originated these supernovae are believed to have had masses up to 2. 4-2. 8 solar masses.

One way to potentially explain the problem of the Champagne Supernova was considering it the result of an aspherical explosion of a white dwarf.

However, spectropolarimetric observations of SN 2009dc showed it had a polarization smaller than 0. 3, making the large asphericity theory unlikely.