Magnetic Neutron Stars in f(R) gravity

Abstract

Neutron stars with strong magnetic fields are considered in the framework of f(R) gravity. In order to describe dense matter in magnetic field, the model with baryon octet interacting through $\sigma$$\rho$$\omega$-fields is used. The hyperonization process results in softening the equation of state (EoS) and in decreasing the maximal mass. We investigate the effect of strong magnetic field in models involving quadratic and cubic corrections in the Ricci scalar $R$ to the Hilbert-Einstein action. For large fields, the Mass-Radius relation differs considerably from that of General Relativity only for stars with masses close to the maximal one. Another interesting feature is the possible existence of more compact stable stars with extremely large magnetic fields ($\sim 6\times 10^{18}$ G instead of $\sim 4\times 10^{18}$ G as in General Relativity) in the central regions of the stars. Due to cubic terms, a significant increasing of the maximal mass is possible.

arXiv comment12 pages, 4 figures, 6 tables

References in corpus (53)

• 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
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• 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
• Chameleon Fields: Awaiting Surprises for Tests of Gravity in Space
• Curvature Quintessence
• Curvature quintessence matched with observational data
• Refined Neutron-Star Mass Determinations for Six Eclipsing X-Ray Pulsar Binaries
• The Lyman-alpha Forest Power Spectrum from the Sloan Digital Sky Survey
• Where new gravitational physics comes from: M-theory?
• Future of the universe in modified gravitational theories: Approaching to the finite-time future singularity
• Further stable neutron star models from f(R) gravity
• Hyperons and massive neutron stars: vector repulsion and SU(3) symmetry
• The Equation of State of Neutron-Star Matter in Strong Magnetic Fields
• Black holes, cosmological solutions, future singularities, and their thermodynamical properties in modified gravity theories
• Effects of Strong Magnetic Fields on Neutron Star Structure
• Hydrostatic equilibrium and stellar structure in f(R)-gravity
• Consistent modified gravity: dark energy, acceleration and the absence of cosmic doomsday
• Hyperons and massive neutron stars: the role of hyperon potentials
• Phantom scalar dark energy as modified gravity: understanding the origin of the Big Rip singularity
• Evidence for a Massive Neutron Star from a Radial-Velocity Study of the Companion to the Black Widow Pulsar PSR B1957+20
• Density dependent hadron field theory for asymmetric nuclear matter and exotic nuclei
• Maximal neutron star mass and the resolution of hyperon puzzle in modified gravity
• Constraints on Perturbative f(R) Gravity via Neutron Stars
• Eight New Millisecond Pulsars in NGC 6440 and NGC 6441
• Neutron Stars in f(R) Gravity with Perturbative Constraints
• Relativistic stars in f(R) gravity, and absence thereof
• Physical parameters of the high-mass X-ray binary 4U1700-37
• Hypernuclear Physics for Neutron Stars
• Hyperon-hyperon interactions and properties of neutron matter
• Kaon Condensation and Dynamical Nucleons in Neutron Stars
• Jeans analysis of self-gravitating systems in f(R)-gravity
• Cold uniform matter and neutron stars in the quark-mesons-coupling model
• Effects of Strong Magnetic Fields in Strange Baryonic Matter
• The existence of relativistic stars in f(R) gravity
• Relativistic stars in f(R) and scalar-tensor theories
• The "K-Correction" for Irradiated Emission Lines in LMXBs: Evidence for a Massive Neutron Star in X1822-371 (V691 CrA)
• A new equation of state for neutron star matter with nuclei in the crust and hyperons in the core
• Quark-hadron phase transition in a neutron star under strong magnetic fields
• Tracking quintessence by cosmic shear - Constraints from VIRMOS-Descart and CFHTLS and future prospects
• Large-mass neutron stars with hyperonization
• Medium effects of magnetic moments of baryons on neutron stars under strong magnetic fields
• Numerical solutions of the modified Lane-Emden equation in f(R)-gravity
• Neutron Stars with Hyperons subject to Strong Magnetic Field
• Singularity of spherically-symmetric spacetime in quintessence/phantom dark energy universe
• Dense stellar matter with trapped neutrinos under strong magnetic fields

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• Stable and self-consistent compact star models in teleparallel gravity
• Decoupling gravitational sources by MGD approach in Rastall gravity
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• Anisotropic fluid spheres in the framework of $f(R,\mathcal{T})$ gravity theory
• Constraining $f(R)$ gravity by the Large Scale Structure
• The mass-radius relation for neutron stars in $f(R)=R+\alpha R^2$ gravity: a comparison between purely metric and torsion formulations
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• Anisotropic neutron stars in $R^2$ gravity
• Expansion of magnetic neutron stars in an energy (in)dependent spacetime
• From neutron stars to quark stars in mimetic gravity
• Supermassive Neutron Stars in Axion $F(R)$ Gravity
• Modified Einstein's gravity as a possible missing link between sub- and super-Chandrasekhar type Ia supernovae
• Equilibrium and stability of relativistic stars in extended theories of gravity
• On stability of a neutron star system in Palatini gravity
• Rotating Neutron Stars in F(R) Gravity with Axions
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• Traversable wormhole models in $f(R)$ gravity
• Dilatonic Equation of Hydrostatic Equilibrium and Neutron Star Structure
• Decoupled Anisotropic Buchdahl's Relativistic Models in $f(\mathbb{R},\mathbb{T})$ Theory
• Neutron stars in Einstein-$\Lambda$ gravity: the cosmological constant effects
• Modelling of a compact anisotropic star as an anisotropic fluid sphere in $f(T)$ gravity
• Tolman-Oppenheimer-Volkoff Equations and their implications or the structures of relativistic Stars in f(T) gravity
• Neutron Stars in frames of $R^2$-gravity and Gravitational Waves
• Weakly Charged Compact Stars in $f\left(R\right)$ gravity
• Investigating dark energy by electromagnetic frequency shifts
• Properties of white dwarfs in Einstein-$\Lambda$ gravity
• Constraining Quadratic $f(R)$ Gravity from Astrophysical Observations of the Pulsar J0704+6620
• Vacuum solutions around spherically symmetric and static objects in the Starobinsky model
• Investigating dark energy by electromagnetic frequency shifts II: the Pantheon+ sample
• Neutron Star Structure in Hořava-Lifshitz Gravity
• Relativistic stars in Starobinsky gravity with the matched asymptotic expansions method
• Reconstruction of f(R) gravity models from observations
• Modeling of non-rotating neutron stars in minimal dilatonic gravity
• Anisotropic Stars in the Non-minimal $Y(R)F^2$ Gravity
• Dipole magnetic field of neutron stars in $f(R)$ gravity
• Probing Strong Field $f(R)$ Gravity and Ultra-Dense Matter with the Structure and Thermal Evolution of Neutron Stars