Quantum gravity corrections in Chandrasekhar limits

Mohamed Moussa

Physica A: Statistical Mechanics and its Applications, 2017, vol. 465, issue C, 25-33

Abstract: It is agreed that Chandrasekhar mass and central density of white dwarfs are independent, which means that there is a whole series of stars having radius and central density as parameters that all have the same Chandrasekhar mass. In this article the influence of a quantum gravity is shown so the Chandrasekhar limits (mass and radius) depend explicitly on the central density and gravity parameters. A new polytropic relation between degenerate pressure of the star and its density is investigated. This leads to a modification in Lane–Emden equation and mass and radius formulas of the star. A modified Lane–Emden equation is solved numerically with consideration to the mass density of the star depends on its radius. The solution was used in calculating the mass and radius limit of the white dwarf. It was found that mass and radius limits decrease due to increase in central density and gravity parameters in a comparison with the original values. We can say that central density and quantum gravity constitute a new tool that can help to make the theoretical values corresponding to experimental observations apply in a better manner.

Keywords: Quantum gravity; Generalized uncertainty principle; White dwarfs (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:465:y:2017:i:c:p:25-33

DOI: 10.1016/j.physa.2016.08.005

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