Constraints on Modified Gravity Models from White Dwarfs

Abstract

Modified gravity theories can introduce modifications to the Poisson equation in the Newtonian limit. As a result, we expect to see interesting features of these modifications inside stellar objects. White dwarf stars are one of the most well studied stars in stellar astrophysics. We explore the effect of modified gravity theories inside white dwarfs. We derive the modified stellar structure equations and solve them to study the mass-radius relationships for various modified gravity theories. We also constrain the parameter space of these theories from observations.

27 pages, 22 figures, 1 Table; Matches the version published in JCAP

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• Early evolutionary tracks of low-mass stellar objects in modified gravity
• The Galactic Center as a laboratory for theories of gravity and dark matter
• Fermi gas and modified gravity
• Massive white dwarfs in $f(R,L_m)$ gravity
• Metric-affine gravity effects on terrestrial (exo-)planets profiles
• White dwarf stars in modified gravity
• Study of the charged super-Chandrasekhar limiting mass white dwarfs in the $f(R,\mathcal{T})$ gravity
• Jupiter and jovian (exo)-planets in Palatini $f(\bar{R})$ gravity
• Parameterized non-relativistic limit of stellar structure equations in Ricci-based gravity theories
• Giant planet formation in Palatini gravity
• Planetary seismology as a test of modified gravity proposals
• Non-homogeneous exoplanets in metric-affine gravity
• Early evolution of fully convective stars in scalar-tensor gravity
• Determining the nature of white dwarfs from low-frequency gravitational waves
• A stellar constraint on Eddington-inspired Born-Infeld gravity from cataclysmic variable binaries
• Cooling process of substellar objects in scalar-tensor gravity
• Cooling Process of White Dwarf Stars in Palatini $f(R)$ Gravity
• Giant low-surface-brightness dwarf galaxy as a test bench for MOdified Gravity
• Dynamics of dwarf galaxies in $f(R)$ gravity
• Constraining fundamental parameters in modified gravity using Gaia-DR2 massive white dwarf observation
• Palatini $f(R)$ gravity tests in the weak field limit: Solar System, seismology and galaxies
• Exact cosmological black hole solutions in Scalar Tensor Vector Gravity
• Modified virial theorem for highly magnetized white dwarfs
• Formation, Possible Detection and Consequences of Highly Magnetized Compact Stars
• White dwarf structure in $f(R,T,L_m)$ gravity: beyond the Chandrasekhar mass limit
• Refining fundamental constants with white dwarfs: machine learning informed constraints on fine-structure constant and proton-to-electron mass ratio
• White dwarfs as a probe of dark energy
• Non-relativistic stellar structure in higher-curvature gravity: systematic construction of solutions to the modified Lane-Emden equations
• Dynamics of Dwarf Galaxies in Scalar-Tensor-Vector-Gravity
• Pre-main sequence evolution of low-mass stars in Eddington-inspired Born-Infeld gravity