Further stable neutron star models from f(R) gravity

Abstract

Neutron star models in perturbative $f(R)$ gravity are considered with realistic equations of state. In particular, we consider the FPS, SLy and other equations of state and a case of piecewise equation of state for stars with quark cores. The mass-radius relations for $f(R)=R+R(e^{-R/R_0}-1)$ model and for $R^2$ models with logarithmic and cubic corrections are obtained. In the case of $R^2$ gravity with cubic corrections, we obtain that at high central densities ($\rho >10{\rho }_{ns}$, where ${\rho }_{ns}=2.7\times 10^{14}$ g/cm${}^3$ is the nuclear saturation density), stable star configurations exist. The minimal radius of such stars is close to $9$ km with maximal mass $\sim 1.9M_{\odot }$ (SLy equation). A similar situation takes place for AP4 and BSK20 EoS. Such an effect can give rise to more compact stars than in General Relativity. If observationally identified, such objects could constitute a formidable signature for modified gravity at astrophysical level. Another interesting result can be achieved in modified gravity with only a cubic correction. For some EoS, the upper limit of neutron star mass increases and therefore these EoS can describe realistic star configurations (although, in General Relativity, these EoS are excluded by observational constraints).

18 pages, 17 figures, revised version significally expanded, to appear in JCAP

References in corpus (49)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Determination of Cosmological Parameters
• Type Ia Supernova Discoveries at z>1 From the Hubble Space Telescope: Evidence for Past Deceleration and Constraints on Dark Energy Evolution
• Shapiro delay measurement of a two solar mass neutron star
• A Massive Pulsar in a Compact Relativistic Binary
• Extended Theories of Gravity
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• Is Cosmic Speed-Up Due to New Gravitational Physics?
• Modified gravity with negative and positive powers of the curvature: unification of the inflation and of the cosmic acceleration
• Curvature Quintessence
• A unified equation of state of dense matter and neutron star structure
• The Cosmic Triangle: Revealing the State of the Universe
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• Curvature quintessence matched with observational data
• The relativistic pulsar-white dwarf binary PSR J1738+0333 II. The most stringent test of scalar-tensor gravity
• Modified gravity with $\ln R$ terms and cosmic acceleration
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Astrophysical Measurement of the Equation of State of Neutron Star Matter
• Extended Quintessence
• Where new gravitational physics comes from: M-theory?
• Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
• Probes and Tests of Strong-Field Gravity with Observations in the Electromagnetic Spectrum
• Black holes, cosmological solutions, future singularities, and their thermodynamical properties in modified gravity theories
• The Mass and Radius of the Neutron Star in 4U 1820-30
• The Distance, Mass, and Radius of the Neutron Star in 4U 1608-52
• Hydrostatic equilibrium and stellar structure in f(R)-gravity
• Consistent modified gravity: dark energy, acceleration and the absence of cosmic doomsday
• The Mass and Radius of the Neutron Star in EXO 1745-248
• Analytical representations of unified equations of state for neutron-star matter
• Phantom scalar dark energy as modified gravity: understanding the origin of the Big Rip singularity
• Non-singular exponential gravity: a simple theory for early- and late-time accelerated expansion
• Constraints on Perturbative f(R) Gravity via Neutron Stars
• Exponential Gravity
• Neutron Stars in f(R) Gravity with Perturbative Constraints
• Relativistic stars in f(R) gravity, and absence thereof
• Jeans analysis of self-gravitating systems in f(R)-gravity
• f(R) gravity theory and CMBR constraints
• Inner edge of neutron-star crust with SLy effective nucleon-nucleon interactions
• Cosmological evolution in exponential gravity
• Time-dependent matter instability and star singularity in $F(R)$ gravity
• The existence of relativistic stars in f(R) gravity
• Relativistic stars in f(R) and scalar-tensor theories
• Tracking quintessence by cosmic shear - Constraints from VIRMOS-Descart and CFHTLS and future prospects
• Testing f(R)-theories using the first time derivative of the orbital period of the binary pulsars
• Chameleon scalar fields in relativistic gravitational backgrounds
• Observational Constraints on Exponential Gravity
• Accelerating universe in scalar tensor models - confrontation of theoretical predictions with observations
• Singularity of spherically-symmetric spacetime in quintessence/phantom dark energy universe

Cited by in corpus (161)

• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• Testing General Relativity with Present and Future Astrophysical Observations
• Stellar equilibrium configurations of compact stars in $f(R,T)$ gravity
• The Mass-Radius relation for Neutron Stars in $f(R)$ gravity
• Extreme neutron stars from Extended Theories of Gravity
• Maximal neutron star mass and the resolution of hyperon puzzle in modified gravity
• Stellar structure models in modified theories of gravity: lessons and challenges
• Causes of Irregular Energy Density in $f(R,T)$ Gravity
• Nonperturbative models of quark stars in $f(R)$ gravity
• The realistic models of relativistic stars in f(R) = R + alpha R^2 gravity
• New Schwarzschild-like solutions in f(T) gravity through Noether symmetries
• Slowly rotating neutron and strange stars in $R^2$ gravity
• Non-perturbative and self-consistent models of neutron stars in R-squared gravity
• Charged anisotropic models for quark stars
• Anisotropic compact stars in $f(R)$ gravity
• On neutron stars in f(R) theories: small radii, large masses and large energy emitted in a merger
• Neutron stars in Starobinsky model
• On wormhole formation in $f(\text{R},\text{T})$ gravity: varying Chaplygin gas and barotropic fluid
• Modified TOV in gravity's rainbow: properties of neutron stars and dynamical stability conditions
• Study of Embedded Class-I Fluid Spheres in $f(R,T)$ Gravity with Karmarkar Condition
• Anisotropic strange stars under simplest minimal matter-geometry coupling in the $f(R,\mathcal{T})$ gravity
• Gravastars in $f(\mathcal{G},T)$ Gravity
• Magnetic Neutron Stars in f(R) gravity
• Rapidly rotating neutron stars in $R$-squared gravity
• Stable and self-consistent compact star models in teleparallel gravity
• Electromagnetic Field and Cylindrical Compact Objects in Modified Gravity
• Existence of Non-singular Stellar Solutions within the context of Electromagnetic Field: A Comparison between Minimal and Non-minimal Gravity Models
• Decoupling gravitational sources by MGD approach in Rastall gravity
• Existence of Compact Structures in $f(R,T)$ Gravity
• Constraint on energy-momentum squared gravity from neutron stars and its cosmological implications
• Relativistic Stars in dRGT Massive Gravity
• Traversable wormholes in $f(R)$ gravity with constant and variable redshift functions
• Neutron stars structure in the context of massive gravity
• Physical Attributes of Anisotropic Compact Stars in $f(R,G)$ Gravity
• Anisotropic fluid spheres in the framework of $f(R,\mathcal{T})$ gravity theory
• Charged wormholes in f(R,T) extended theory of gravity
• Radial oscillations and stability of compact stars in $f(R,T)=R+2\beta T$ gravity
• Neutron stars in $f(\mathtt{R},{\mathtt{L}}_{\mathtt{m}})$ gravity with realistic equations of state: joint-constrains with GW170817, massive pulsars, and the PSR J0030+0451 mass-radius from $NICER$ data
• Quark Stars in $f(T,\mathcal{T})-$Gravity
• Neutron stars in $f(\mathcal{R},\mathcal{T})$ gravity using realistic equations of state in the light of massive pulsars and GW170817
• Emerging Anisotropic Compact Stars in $f(\mathcal{G},T)$ Gravity
• The mass-radius relation for neutron stars in $f(R)=R+\alpha R^2$ gravity: a comparison between purely metric and torsion formulations
• Spherically symmetric black holes with electric and magnetic charge in extended gravity: Physical properties, causal structure, and stability analysis in Einstein's and Jordan's frames
• Anisotropic neutron stars in $R^2$ gravity
• Constrained $f(Q,T)$ gravity accelerating cosmological model and its dynamical system analysis
• Non-trivial black hole solutions in $f(R)$ gravitational theory
• From neutron stars to quark stars in mimetic gravity
• Maximum Baryon Masses for Static Neutron Stars in $f(R)$ Gravity
• Buchdahl model in f(R, T) gravity: A comparative study with standard Einstein's gravity
• Numerical solutions of the modified Lane-Emden equation in f(R)-gravity
• Influence of three parameters on maximum mass and stability of strange star under linear $f(Q)-$action
• Supermassive Neutron Stars in Axion $F(R)$ Gravity
• Tolman-Oppenheimer-Volkoff equations in non-local $f(R)$ gravity
• A conservative energy-momentum tensor in the $f(R,T)$ gravity and its implications for the phenomenology of neutron stars
• Modified Einstein's gravity as a possible missing link between sub- and super-Chandrasekhar type Ia supernovae
• What does a measurement of mass and/or radius of a neutron star constrain: Equation of state or gravity?
• Neutron stars with a generalized Proca hair and spontaneous vectorization
• Stellar Structures in $f(\mathcal{G})$ Gravity with Tolman-Kuchowicz Spacetime
• $R^p$ Attractors Static Neutron Star Phenomenology
• Stability criterion for white dwarfs in Palatini $f(R)$ gravity
• Tolman-Oppenheimer-Volkoff Equations in Modified Gauss-Bonnet Gravity
• Neutron stars in $f(R)$ gravity and scalar-tensor theories
• Constraints on $f(R)$ theories of gravity from GW170817
• Rotating Neutron Stars in F(R) Gravity with Axions
• Universal Inflationary Attractors Implications on Static Neutron Stars
• Inflationary Attractors Predictions for Static Neutron Stars in the Mass-Gap Region
• Bounce cosmology in $f(\mathcal{R})$ gravity
• Einstein's cluster mimicking compact star in the teleparallel equivalent of general relativity
• Neutron Stars in Scalar-tensor Gravity with Quartic Order Scalar Potential
• Anisotropic compact stars in higher-order curvature theory
• Static Neutron Stars Perspective of Quadratic and Induced Inflationary Attractor Scalar-tensor Theories
• Ultra long lived quasinormal modes of neutron stars in massive scalar-tensor gravity
• Ricci Inverse Anisotropic Stellar Structures
• Physical validity of anisotropic models derived from isotropic fluid dynamics in $f(R,T)$ theory: An implication of gravitational decoupling
• A Conformally Flat Generalized Ricci Recurrent Spacetime in F(R)-Gravity
• Thermodynamic topology of topological black hole in $F(R)$-ModMax gravity's rainbow
• Relativistic star perturbations in Horndeski theories with a gauge-ready formulation
• Cosmological singularities in interacting dark energy models with an $\omega (q)$ parametrization
• Compact stars with a small electric charge: the limiting radius to mass relation and the maximum mass for incompressible matter
• Study of Compact Stars in $\mathcal{R}+\alpha \mathcal{A}$ Gravity
• Decoupled Anisotropic Buchdahl's Relativistic Models in $f(\mathbb{R},\mathbb{T})$ Theory
• Embedded Class-I Solution of Compact Stars in $f(R)$ Gravity with Karmarkar Condition
• Realistic neutron star models in $f(T)$ gravity
• Maximal Masses of White Dwarfs for Polytropes in $R^2$ Gravity and Theoretical Constraints
• Cosmological model involving an interacting van der Waals fluid
• Structure of Compact Stars in R-squared Palatini Gravity
• Compact Star in General $F(R)$ Gravity: Inevitable Degeneracy Problem and Non-Integer Power Correction
• Gravitational wave in f(R) gravity: possible signature of sub- and super-Chandrasekhar limiting mass white dwarfs
• Anisotropic stellar models admitting conformal motion
• Strongest constraint in $f(R)=R+\alpha R^2$ gravity: stellar stability
• Neutron stars in Einstein-$\Lambda$ gravity: the cosmological constant effects
• Asymptotically flat vacuum solution in modified theory of Einstein's gravity
• Stellar Hydrostatic Equilibrium Compact Structures in $f(\mathcal{G},T)$ Gravity
• A viable logarithmic f(R) model for inflation
• Modelling of a compact anisotropic star as an anisotropic fluid sphere in $f(T)$ gravity
• Stability of relativistic stars with scalar hairs
• Accelerated observers and the notion of singular spacetime
• Charged quark stars in metric $f(R)$ gravity
• The Role of Baryon Structure in Neutron Stars
• External stability for Spherically Symmetric Solutions in Lorentz Breaking Massive Gravity
• Bardeen Compact Stars in Modified $f(R)$ Gravity with Conformal Motion
• Gravitationally collapsing stars in $f(R)$ gravity
• Weak-field limit of $f(R)$ gravity to unify peculiar white dwarfs
• Hydrostatic equilibrium configurations of neutron stars in a non-minimal geometry-matter coupling theory of gravity
• Neutron Stars in frames of $R^2$-gravity and Gravitational Waves
• Mass - radius ratio bounds for compact objects in Lorentz-violating dRGT Massive Gravity theory
• Analytic Electrically Charged Black Holes in $F(R)$-ModMax Theory
• Neutron star masses in $R^2$-gravity
• Weakly Charged Compact Stars in $f\left(R\right)$ gravity
• The phase diagram of Einstein-Weyl gravity
• The gravitational field of a star in quadratic gravity
• Uniqueness of the Inflationary Higgs Scalar for Neutron Stars and Failure of non-inflationary Approximations
• Properties of white dwarfs in Einstein-$\Lambda$ gravity
• Investigating dark energy by electromagnetic frequency shifts
• Magnetofluid Dynamics in curved spacetime
• Instability of compact stars with a nonminimal scalar-derivative coupling
• Topological phantom AdS black holes in $F(R)$ gravity
• $R^2$-gravity quark stars from perturbative QCD
• Black Holes with Electric and Magnetic Charges in $F(R)$ Gravity
• Non-symmetric wormholes and localized Big Rip singularities in Einstein-Weyl gravity
• Circular geodesics in the field of double-charged dilatonic black holes
• Vacuum solutions around spherically symmetric and static objects in the Starobinsky model
• Constraining Quadratic $f(R)$ Gravity from Astrophysical Observations of the Pulsar J0704+6620
• Isotropic and anisotropic neutron star structure in 4D Einstein Gauss Bonnet Gravity
• Investigating dark energy by electromagnetic frequency shifts II: the Pantheon+ sample
• On static and spherically symmetric solutions of Starobinsky model
• Neutron Star Structure in Hořava-Lifshitz Gravity
• Two-dimensional Lifshitz-like AdS black holes in $F(R)$ gravity
• Compact relativistic geometries in $f(R,G)$ gravity
• Imprint of modified Einstein's gravity on white dwarfs: Unifying type Ia supernovae
• The structure of hybrid neutron star in Einstein-$\Lambda$ gravity
• Neutron Stars In $f(R,T)$ Theory: Slow Rotation Approximation
• Relativistic stars in Starobinsky gravity with the matched asymptotic expansions method
• Screened and Unscreened Solutions for Relativistic Star in de Rham-Gabadadze-Tolley (dRGT) Massive Gravity
• Collapsing dynamics of relativistic fluid in modified gravity admitting a conformal Killing vector
• The inflationary scenario in the $f(R)$ gravity model with a $R^4$ term
• Hybrid star within $f(\mathcal{G})$ gravity
• Neutron Stars in Palatini $R+\alpha R^2$ and $R+\alpha R^2+\beta Q$ Theories
• Dynamics of self-gravitating systems in non-linearly magnetized chameleonic Brans-Dicke gravity
• Self-gravitating systems in Extended Gravity
• Dipole magnetic field of neutron stars in $f(R)$ gravity
• Solar system tests and neutron stars in $f(R)$ gravity revisited
• Gravitational Collapse of Anisotropic Compact Stars in Modified $f(R)$ Gravity
• Probing Strong Field $f(R)$ Gravity and Ultra-Dense Matter with the Structure and Thermal Evolution of Neutron Stars
• An innovative black hole solution and thermodynamic properties in higher-order curvature gravity with a scalar field
• Analytical Stellar Models of Neutron Stars in Teleparallel Gravity
• Neutron Stars in Mimetic Gravity
• Tidal deformability of neutron stars with exotic particles within a density dependent relativistic mean field model in R-squared gravity
• Nonlinear evolution of anisotropic matter configurations under higher-order curvature corrections
• The shadow of black holes in $F(R)$-ModMax theory with cosmic strings
• On the linear stability of polytropic fluid spheres in $R^2$ gravity
• Strange quark star in dilaton gravity
• The Jeans theorem and the "Tolman-Oppenheimer-Volkov equation" in an exact wave solution of R^2 gravity
• Toy models of Universe with an Effective varying $\Lambda$-Term in Lyra Manifold
• Thermodynamics and optical aspects of ModMax black holes in higher order curvature gravity with quintessence dark energy
• Thermodynamics, Phase Transitions, and Geodesic Structure of F(R)-Phantom Banados-Teitelboim-Zanelli (BTZ) Black Holes
• Accelerating electrically charged ModMax black hole solutions in $F(R)$ gravity
• Bayesian Inference of Neutron Star Properties in $f(Q)$ Gravity Using NICER Observations
• Maximum mass limit of strange stars in quadratic curvature-matter coupled gravity
• Neutron Stars in Scalar Torsion Theories with Nonminimal Coupling
• Bulk-boundary decompositions and exact perfect fluid stellar distributions