Massive Neutron Stars and White Dwarfs as Noncommutative Fuzzy Spheres

TL;DR

This paper proposes that massive neutron stars and white dwarfs can be modeled as noncommutative fuzzy spheres, offering a quantum gravity perspective that could explain their observed masses and provide evidence for noncommutative geometry.

Contribution

It introduces a novel model using squashed fuzzy spheres from noncommutative geometry to explain massive compact objects in astrophysics.

Findings

Massive white dwarfs and neutron stars can be modeled as fuzzy spheres.

The model aligns with observations of super-Chandrasekhar white dwarfs.

It suggests observational evidence for noncommutative geometry in quantum gravity.

Abstract

Over the last couple of decades, there are direct and indirect evidences for massive compact objects than their conventional counterparts. A couple of such examples are super-Chandrasekhar white dwarfs and massive neutron stars. The observations of more than a dozen peculiar over-luminous type Ia supernovae predict their origins from super-Chandrasekhar white dwarf progenitors. On the other hand, recent gravitational wave detection and some pulsar observations argue for massive neutron stars, lying in the famous mass-gap between lowest astrophysical black hole and conventional highest neutron star masses. We show that the idea of a squashed fuzzy sphere, which brings in noncommutative geometry, can self-consistently explain either of the massive objects as if they are actually fuzzy or squashed fuzzy spheres. Noncommutative geometry is a branch of quantum gravity. If the above proposal is correct, it will provide observational evidences for noncommutativity.