White dwarf cooling in $f(R,T)$ gravity

Abstract

In recent times, astounding observations of both over- and under-luminous type Ia supernovae have emerged. These peculiar observations hint not only at surpassing the Chandrasekhar limit but may also suggest potential modifications in the physical attributes of their progenitors, such as their cooling rate. This, in turn, can influence their temporal assessments and provide a compelling explanation for these intriguing observations. In this spirit, we investigate here the cooling process of white dwarfs in $f(R,T)$ gravity with the simplest model $f(R,T)=R+\lambda T$, where $\lambda$ is the model parameter. Our modelling suggests that the cooling timescale of white dwarfs exhibits an inverse relationship with the model parameter $\lambda$, which implies that for identical initial conditions, white dwarfs in $f(R,T)$ gravity cool faster. This further unveils that in the realm of $f(R,T)$ gravity, the energy release rate for white dwarfs increases as $\lambda$ increases. Furthermore, we also report that the luminosity of the white dwarfs also depends on $\lambda$ and an upswing in $\lambda$ leads to an amplification in the luminosity, and consequently a larger white dwarf in general relativity can exhibit comparable luminosity to a smaller white dwarf in $f(R,T)$ gravity.

References in corpus (55)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• f(R,T) gravity
• f(R,L_m) gravity
• A Common Explosion Mechanism for Type Ia Supernovae
• Reconstruction of some cosmological models in f(R,T) gravity
• Nonminimal coupling of perfect fluids to curvature
• Modified gravity with arbitrary coupling between matter and geometry
• The Remarkable Deaths of 9 - 11 Solar Mass Stars
• Stellar equilibrium configurations of compact stars in $f(R,T)$ gravity
• Dynamics of scalar perturbations in f(R,T) gravity
• Cosmological and Solar System Consequences of f(R,T) Gravity Models
• Palatini form of 1/R gravity
• Cosmological perturbations in the Palatini formulation of modified gravity
• Dark Matter From f(R,T) Gravity
• f(R) gravity theories in Palatini formalism: cosmological dynamics and observational constraints
• Stellar equilibrium configurations of white dwarfs in the $f(R,T)$ gravity
• Extended $f(R,L_m)$ gravity with generalized scalar field and kinetic term dependences
• Testing general relativity and probing the merger history of massive black holes with LISA
• Evolution of Axially Symmetric Anisotropic Sources in $f(R,T)$ Gravity
• White Dwarf Critical Tests for Modified Gravity
• Unification of inflation and cosmic acceleration in the Palatini formalism
• Conservation laws in theories with universal gravity/matter coupling
• Dynamically induced Planck scale and inflation in the Palatini formulation
• Reexamining $f(R,T)$ gravity
• A new white dwarf constraint on the rate of change of the gravitational constant
• Inflation in $f(R,T)$ Gravity
• Modified Gravity with a Non-minimal Gravitational Coupling to Matter
• White dwarfs and revelations
• Comprehensive Analysis of a Non-Singular Bounce in $f(R,T)$ Gravitation
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Neutron stars in $f(R,T)$ gravity with conserved energy-momentum tensor: Hydrostatic equilibrium and asteroseismology
• The cosmology in f(R,T) gravity without dark energy
• Cosmic acceleration from modified gravity with Palatini formalism
• White dwarfs in de Rham-Gabadadze-Tolley like massive gravity
• Modified Einstein's gravity as a possible missing link between sub- and super-Chandrasekhar type Ia supernovae
• An independent constraint on the secular rate of variation of the gravitational constant from pulsating white dwarfs
• A conservative energy-momentum tensor in the $f(R,T)$ gravity and its implications for the phenomenology of neutron stars
• Palatini $R^2$ Quintessential Inflation
• Modified Einstein's gravity to probe the sub- and super-Chandrasekhar limiting mass white dwarfs: a new perspective to unify under- and over-luminous type Ia supernovae
• Stability criterion for white dwarfs in Palatini $f(R)$ gravity
• General approach to the Lagrangian ambiguity in $f(R,T)$ gravity
• Analytic Models of Brown Dwarfs and The Substellar Mass Limit
• Fermi gas and modified gravity
• Metric-affine effects in crystallization processes of white dwarfs
• White dwarf stars in modified gravity
• Gravitational wave in f(R) gravity: possible signature of sub- and super-Chandrasekhar limiting mass white dwarfs
• Fully conservative $f(R,T)$ gravity and Solar System constraints
• Weak-field limit of $f(R)$ gravity to unify peculiar white dwarfs
• Inflation in mimetic $f(R,T)$ gravity
• The evolution of white dwarfs with a varying gravitational constant
• Properties of white dwarfs in Einstein-$\Lambda$ gravity
• Cooling Process of White Dwarf Stars in Palatini $f(R)$ Gravity
• Imprint of modified Einstein's gravity on white dwarfs: Unifying type Ia supernovae
• Growth of matter fluctuations in $f(R,T)$ Gravity

Cited by in corpus (1)

• Black holes in $f(R,T)$ gravity coupled with Euler-Heisenberg electrodynamics