Early evolution of fully convective stars in scalar-tensor gravity

Abstract

In this work, the early evolution of low-mass fully convective stars is studied in the context of DHOST (degenerate higher order scalar-tensor) theories of gravity. Although it is known that the hydrostatic equilibrium equation is modified for scalar-tensor gravity, the consequent modifications to the early evolution phases of a star were not explored in this framework. With this in mind, we consider three evolutionary phases - contraction to the main sequence, lithium burning and entrance to the main sequence - and investigate how each of these phases is affected by the theory's parameter. Taking these effects into account, we are able to show, among other things, that the Hayashi tracks are shifted and the star's age is considerably modified.

11 pages, 1 figure, to appear in EPJC

References in corpus (42)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• The Confrontation between General Relativity and Experiment
• Dark Energy after GW170817: dead ends and the road ahead
• Extended Theories of Gravity and their Cosmological and Astrophysical Applications
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• Mass-Radius Relationships for Solid Exoplanets
• Implications of the Neutron Star Merger GW170817 for Cosmological Scalar-Tensor Theories
• Horndeski theory and beyond: a review
• Exploring gravitational theories beyond Horndeski
• The Primordial Lithium Problem
• The stellar halo of the Galaxy
• Modified Gravity and Cosmology: An Update by the CANTATA Network
• Extended Gravity Description for the GW190814 Supermassive Neutron Star
• Linking Tests of Gravity On All Scales: from the Strong-Field Regime to Cosmology
• Causal Limit of Neutron Star Maximum Mass in $f(R)$ Gravity in View of GW190814
• Modified gravity inside astrophysical bodies
• Testing Screened Modified Gravity
• Exoplanets as Sub-GeV Dark Matter Detectors
• Remnants of Black Rings from Gravity's Rainbow
• Deceleration versus Acceleration Universe in Different Frames of $F(R)$ Gravity
• Vainshtein regime in Scalar-Tensor gravity: constraints on DHOST theories
• Maximum Baryon Masses for Static Neutron Stars in $f(R)$ Gravity
• Stability criterion for white dwarfs in Palatini $f(R)$ gravity
• Universal Inflationary Attractors Implications on Static Neutron Stars
• Neutron Stars in Scalar-tensor Gravity with Quartic Order Scalar Potential
• Cooling process of brown dwarfs in Palatini f(R) gravity
• Fermi gas and modified gravity
• Lithium abundance is a gravitational model dependent quantity
• Modified Gravity and the Black Hole Mass Gap
• White dwarf stars in modified gravity
• Metric-affine gravity effects on terrestrial (exo-)planets profiles
• Searching for dark energy with the Sun
• Metric-affine effects in crystallization processes of white dwarfs
• Jupiter and jovian (exo)-planets in Palatini $f(\bar{R})$ gravity
• Higher mass limits of neutron stars from the equation of states in curved spacetime
• Weak-field limit of $f(R)$ gravity to unify peculiar white dwarfs
• Modified gravity in the interior of population II stars
• Invariant quantities of Scalar-Tensor Theories for stellar structure
• Giant planet formation in Palatini gravity
• Non-homogeneous exoplanets in metric-affine gravity
• Novel Stellar Astrophysics from Extended Gravity

Cited by in corpus (7)

• Fermi equation of state with finite temperature corrections in quantum space-times approach: Snyder model vs GUP case
• Constraining Snyder and GUP models with low-mass stars
• Planetary seismology as a test of modified gravity proposals
• Cooling process of substellar objects in scalar-tensor gravity
• Crystallized white dwarf stars in scalar-tensor gravity
• Bose-Einstein Condensate and Liquid Helium He${}^4$: Implications of GUP and Modified Gravity Correspondence
• Refining Bounds for Snyder and GUP Models through Seismic Wave Analysis