Effect of dynamical noncommutativity on the limiting mass of white dwarfs

TL;DR

This paper explores how dynamical noncommutativity can significantly increase the mass limit of white dwarfs, potentially explaining over-luminous type Ia supernovae beyond the classical Chandrasekhar limit.

Contribution

It introduces a model with momentum noncommutativity that raises the white dwarf mass limit to about 4.68 solar masses, surpassing the traditional Chandrasekhar limit.

Findings

White dwarf mass limit can be increased to approximately 4.68 solar masses.

Noncommutativity between momentum components influences stellar mass limits.

Potential explanation for over-luminous type Ia supernovae.

Abstract

The discovery of the existence of an upper bound on the mass of a white dwarf star is considered as one of the finest of twentieth century astrophysics. On approaching this limiting mass of $1.4M_\odot$, known as the Chandrasekhar mass-limit, a white dwarf is believed to spark of with an explosion called type Ia supernova, which is considered to be a standard candle. But since the last decade, observations of several over-luminous, peculiar type Ia supernovae indicate that the Chandrasekhar-limit be significantly larger. By postulating noncommutativity between the components of momentum variables, we show that the mass of white dwarfs can be enhanced significantly and arrive at a new super-Chandrasekhar mass limit of about $4.68M_\odot$. This can provide a plausible explanation for the origin of over-luminous peculiar type Ia supernovae.