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

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 pas...

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Bibliographic Details
Published in:arXiv.org 2021-11
Main Authors: Kalita, Surajit, Govindarajan, T R, Mukhopadhyay, Banibrata
Format: Article
Language:English
Subjects:
Geometry
Quantum gravity
Supernovae
White dwarf stars
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2111.05878