Neutron Stars in f(R)-Gravity and Its Extension with a Scalar Axion Field

Abstract

We present a brief review of general results about non-rotating neutron stars in simple R-square gravity and its extension with a scalar axion field. Modified Einstein equations are presented for metrics in isotropical coordinates. The mass-radius relation, mass profile and dependence of mass from central density on various equations of state are given in comparison to general relativity.

arXiv commentIn special issue «Selected Papers from "The Modern Physics of Compact Stars and Relativistic Gravity 2019"»

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
• 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
• Extended Theories of Gravity
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• The equation of state for nucleon matter and neutron star structure
• A direct empirical proof of the existence of dark matter
• 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
• Axion Cosmology
• PSR J0030+0451 Mass and Radius from NICER Data and Implications for the Properties of Neutron Star Matter
• A NICER View of PSR J0030+0451: Millisecond Pulsar Parameter Estimation
• Testing General Relativity with Present and Future Astrophysical Observations
• Curvature Quintessence
• Results from the Final Exposure of the CDMS II Experiment
• Palatini Approach to Modified Gravity: f(R) Theories and Beyond
• A Search for Invisible Axion Dark Matter with the Axion Dark Matter Experiment
• WIMP dark matter candidates and searches - current status and future prospects
• Direct Detection of WIMP Dark Matter: Concepts and Status
• Where new gravitational physics comes from: M-theory?
• Approximate Universal Relations for Neutron Stars and Quark Stars
• Black holes, cosmological solutions, future singularities, and their thermodynamical properties in modified gravity theories
• Hydrostatic equilibrium and stellar structure in f(R)-gravity
• Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222
• The Mass-Radius relation for Neutron Stars in $f(R)$ gravity
• First Results from ABRACADABRA-10 cm: A Search for Sub-$\mu$eV Axion Dark Matter
• Stellar structure models in modified theories of gravity: lessons and challenges
• What does the Bullet Cluster tell us about self-interacting dark matter?
• Tunable axion plasma haloscopes
• Constraining the dense matter equation of state with joint analysis of NICER and LIGO/Virgo measurements
• Nonperturbative models of quark stars in $f(R)$ gravity
• The realistic models of relativistic stars in f(R) = R + alpha R^2 gravity
• Jeans analysis of self-gravitating systems in f(R)-gravity
• Chandra Spectra of the Soft X-ray Diffuse Background
• A New Bound on Axion-Like Particles
• Astrophysical and theoretical physics implications from multimessenger neutron star observations
• The large-scale modulation of the density distribution in standard axionic CDM and its cosmological and physical impact
• Detecting Axion Dark Matter with Radio Lines from Neutron Star Populations
• Unification of Inflation with Dark Energy in $f(R)$ Gravity and Axion Dark Matter
• Detecting the Stimulated Decay of Axions at Radio Frequencies
• Looking for Axion Dark Matter in Dwarf Spheroidals
• The mass-radius relation for neutron stars in $f(R)=R+\alpha R^2$ gravity: a comparison between purely metric and torsion formulations
• Axions from cooling compact stars: pair-breaking processes
• Non-minimal coupling of photons and axions
• Supermassive Neutron Stars in Axion $F(R)$ Gravity
• Quantifying the evidence for Dark Matter in CoGeNT data
• $F(R)$ Gravity with an Axion-like Particle: Dynamics, Gravity Waves, Late and Early-time Phenomenology
• The Past and Future of Light Dark Matter Direct Detection
• Efficient self-resonance instability from axions
• Geometrical Destabilisation of Ultra-Light Axions in String Inflation
• Gradient models of the axion-photon coupling
• Axion resonances in binary pulsar systems
• Axion-induced oscillations of cooperative electric field in a cosmic magneto-active plasma
• Radiative Axion Inflation

Cited by in corpus (7)

• Physical Characteristics and Maximum Allowable Mass of Hybrid Star in the Context of $f(Q)$ Gravity
• Revisiting compact star in $F(R)$ gravity: Roles of chameleon potential and energy conditions
• Compact star in noninteger power model of $f(R)$ gravity
• Neutron Stars in Palatini $R+\alpha R^2$ and $R+\alpha R^2+\beta Q$ Theories
• $f(R)$ Dual Theories of Quintessence : Expansion-Collapse Duality
• On the linear stability of polytropic fluid spheres in $R^2$ gravity
• Thermodynamics, Phase Transitions, and Geodesic Structure of F(R)-Phantom Banados-Teitelboim-Zanelli (BTZ) Black Holes