Natural evidence for fuzzy sphere noncommutative geometry: super-Chandrasekhar white dwarfs

TL;DR

This paper explores how modeling white dwarfs as fuzzy spheres within noncommutative geometry can explain super-Chandrasekhar masses, potentially accounting for observations of over-luminous supernovae.

Contribution

It introduces a novel approach of representing white dwarfs as fuzzy spheres in noncommutative geometry to explain super-Chandrasekhar masses.

Findings

White dwarfs modeled as fuzzy spheres can exceed the Chandrasekhar limit.

Noncommutative effects depend on inter-electron separations.

This approach may explain over-luminous supernovae observations.

Abstract

Noncommutative geometry is one of the quantum gravity theories, which various researchers have been using to describe different physical and astrophysical systems. However, so far, no direct observations can justify its existence, and this theory remains a hypothesis. On the other hand, over the past two decades, more than a dozen over-luminous type Ia supernovae have been observed, which indirectly predict that they originate from white dwarfs with super-Chandrasekhar masses $2.1-2.8 \rm\,M_\odot$. In this article, we discuss that considering white dwarfs as squashed fuzzy spheres, a class of noncommutative geometry, helps in accumulating more mass than the Chandrasekhar mass-limit. The length-scale beyond which the effect of noncommutativity becomes prominent is an emergent phenomenon, which depends only on the inter-electron separations in the white dwarf.