The effect of $f(R,T)$ modified gravity on mass and radius of pulsar HerX1

Abstract

Recent findings from the Neutron Star Interior Composition Explorer (NICER) have opened up opportunities to investigate the potential coupling between matter and geometry, along with its resulting physical implications. Millisecond pulsars serve as an ideal subject for conducting such tests and examining these phenomena. We apply the field equations of modified gravity, $f(R,T)=R+\alpha T$ to a spherically symmetric spacetime, where $R$ is the Ricci scalar, $\alpha$ is a dimensional parameter, and $T$ is the matter of the geometry. Five unknown functions are present in the output system of differential equations, which consists of three equations. To close the system, we make explicit assumptions about the anisotropy and the radial metric potential, $g_{rr}$. We then solve the output differential equations and derive the explicit forms of the components of the energy-momentum tensor, namely, density, radial, and tangential pressures.

arXiv comment22 pages, 10 figures, 3 tables

References in corpus (94)

• GW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral
• f(R) Theories Of Gravity
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• Advanced Virgo: a 2nd generation interferometric gravitational wave detector
• Modified Gravity and Cosmology
• Shapiro delay measurement of a two solar mass neutron star
• The Confrontation between General Relativity and Experiment
• A Massive Pulsar in a Compact Relativistic Binary
• f(R) theories
• Extended Theories of Gravity
• Introduction to Modified Gravity and Gravitational Alternative for Dark Energy
• f(R,T) gravity
• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• GW170817: Measurements of Neutron Star Radii and Equation of State
• Is Cosmic Speed-Up Due to New Gravitational Physics?
• GW190814: Gravitational Waves from the Coalescence of a 23 M${}_{\odot }$ Black Hole with a 2.6 M${}_{\odot }$ Compact Object
• 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
• GW190425: Observation of a Compact Binary Coalescence with Total Mass $\sim 3.4M_{\odot }$
• Curvature Quintessence
• Characterization of the LIGO detectors during their sixth science run
• Properties of the binary neutron star merger GW170817
• A NICER View of the Massive Pulsar PSR J0740+6620 Informed by Radio Timing and XMM-Newton Spectroscopy
• Binary Black Hole Population Properties Inferred from the First and Second Observing Runs of Advanced LIGO and Advanced Virgo
• Sound Speeds, Cracking and Stability of Self-Gravitating Anisotropic Compact Objects
• Tidal Deformabilities and Radii of Neutron Stars from the Observation of GW170817
• Tests of General Relativity with GW170817
• PSR J0952-0607: The Fastest and Heaviest Known Galactic Neutron Star
• Refined Neutron-Star Mass Determinations for Six Eclipsing X-Ray Pulsar Binaries
• Maximum bounds on the surface redshift of anisotropic stars
• Bounds on the basic physical parameters for anisotropic compact general relativistic objects
• Nonparametric constraints on neutron star matter with existing and upcoming gravitational wave and pulsar observations
• The Mass and Radius of the Neutron Star in 4U 1820-30
• Peering into the dark side: magnesium lines establish a massive neutron star in PSR J2215+5135
• Constraining Neutron-Star Matter with Microscopic and Macroscopic Collisions
• Sound velocity bound and neutron stars
• Stellar equilibrium configurations of compact stars in $f(R,T)$ gravity
• The Mass and Radius of the Neutron Star in EXO 1745-248
• A NICER view of PSR J0030+0451: Implications for the dense matter equation of state
• GW170817: constraining the nuclear matter equation of state from the neutron star tidal deformability
• Stellar structure models in modified theories of gravity: lessons and challenges
• Extending the Higgs sector: an extra singlet
• Modified Gravity and Cosmology: An Update by the CANTATA Network
• Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter
• Non-parametric inference of the neutron star equation of state from gravitational wave observations
• Study on anisotropic strange stars in $f(R,T)$ gravity: An embedding approach under simplest linear functional of matter-geometry coupling
• Radial pulsations and stability of anisotropic stars with quasi-local equation of state
• Role of pressure anisotropy on relativistic compact stars
• The Mass of the Compact Object in the X-Ray Binary Her X-1/HZ Her
• Exploring physical features of anisotropic strange stars beyond standard maximum mass limit in $f\left(R,\mathcal{T}\right)$ gravity
• Higher dimensional charged $f(R)$ black holes
• Physically viable solutions of anisotropic spheres in $f(\mathcal{R},\mathcal{G})$ gravity satisfying the Karmarkar condition
• Anisotropic compact stars in $f(R)$ gravity
• Neutron stars in Starobinsky model
• Strange stars in $f(R,\mathcal{T})$ gravity
• Analytical study of anisotropic compact star models
• Anisotropic strange star with Tolman-Kuchowicz metric under $f(R,T)$ gravity
• A bound on the speed of sound from holography
• Anisotropic Neutron Stars Modelling: Constraints in Krori-Barua Spacetime
• Charged compact star in $f(R,T)$ gravity in Tolman-Kuchowicz spacetime
• Bouncing cosmological solutions from f(R,T) gravity
• Stable and self-consistent compact star models in teleparallel gravity
• Non-trivial class of anisotropic compact stellar model in Rastall gravity
• Study on charged strange stars in $f\left(R,\mathcal{T}\right)$ gravity
• Towards mitigation of apparent tension between nuclear physics and astrophysical observations by improved modeling of neutron star matter
• The tidal deformability of an anisotropic compact star: Implications of GW170817
• Secondary component of gravitational-wave signal GW190814 as an anisotropic neutron star
• Anisotropic fluid spheres in the framework of $f(R,\mathcal{T})$ gravity theory
• Physical Attributes of Anisotropic Compact Stars in $f(R,G)$ Gravity
• Equilibrium, radial stability and non-adiabatic gravitational collapse of anisotropic neutron stars
• Slow-roll inflation in f(R,T) gravity and a modified Starobinsky-like inflationary model
• Radial oscillations and stability of compact stars in $f(R,T)=R+2\beta T$ gravity
• Impact of the neutron star crust on the tidal polarizability
• Inflation in $f(R,T)$ Gravity
• Neutron stars in $f(\mathcal{R},\mathcal{T})$ gravity using realistic equations of state in the light of massive pulsars and GW170817
• Comprehensive Analysis of a Non-Singular Bounce in $f(R,T)$ Gravitation
• X-ray Spectroscopy of the High Mass X-ray Binary Pulsar Centaurus X-3 over its Binary Orbit
• Anisotropic neutron stars in $R^2$ gravity
• A Quantum Space Behind Simple Quantum Mechanics
• Energy and momentum of a spherically symmetric dilaton frame as regularized by teleparallel gravity
• Anisotropic Stars in 4D Einstein-Gauss-Bonnet Gravity
• Impact of Rastall gravity on mass, radius and sound speed of the pulsar PSR J0740+6620
• Constraining the neutron-matter equation of state with gravitational waves
• Analytic rotating black hole solutions in $N$-dimensional $f(T)$ gravity
• General relativistic polytropes in anisotropic stars
• Anisotropic compact stars in the mimetic gravitational theory
• Anisotropic quark stars in $f(R)=R^{1+\epsilon }$ gravity
• Anisotropic compact stars in higher-order curvature theory
• Moment of inertia of slowly rotating anisotropic neutron stars in $f(R,T)$ gravity
• Systematic analysis of the impacts of symmetry energy parameters on neutron star properties
• Anisotropic magnetized neutron star
• Bulk viscous cosmological model in $f(R,T)$ theory of gravity
• Gravitational wave echoes from compact stars in $f(\mathcal{R},T)$ gravity
• Anisotropic fluid spheres in Hořava gravity and Einstein-æther theory with a non-static æther

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• Extending Finch-Skea Isotropic Model to Anisotropic Domain in Modified $f(\mathcal{R},\mathcal{T})$ Gravity
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• Growth of cosmic perturbations in the modified $f(R,T)$ gravity
• Modified $f(R,T)$ theory in light of gravitational wave standard sirens
• Wormhole Solutions and Pre-inflationary Epoch in $F(R,T)$ Gravity with Axion Fields