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Photon ring bounds of scalar hairy charged black holes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-15 Yun Soo Myung
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The generalized Vaidya spacetime with polytropic equation of state Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-14 Vitalii Vertogradov
The process of the gravitational collapse might lead not only to a black hole but also to naked singularity formation. In this paper, we consider the generalized Vaidya spacetime with polytropic and generalized polytropic equations of state. We solve the Einstein and Einstein–Maxwell equations to obtain the explicit form of a mass function. We consider the limiting cases of solutions and find out,
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Galactic microlensing by backreacted massless wormholes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-13 G. F. Akhtaryanova, R. Kh. Karimov, R. N. Izmailov, K. K. Nandi
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Quantum and higher curvature corrections to the anti-de Sitter black hole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-08 Kristian Hauser Villegas, Reginald Christian Bernardo
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Signatures of quantum geometry from exponential corrections to the black hole entropy Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-09 Soham Sen, Ashis Saha, Sunandan Gangopadhyay
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Hamiltonian formulation of general relativity and post-Newtonian dynamics of compact binaries Living Rev. Relat. (IF 40.6) Pub Date : 2024-05-03 Gerhard Schäfer, Piotr Jaranowski
Hamiltonian formalisms provide powerful tools for the computation of approximate analytic solutions of the Einstein field equations. The post-Newtonian computations of the explicit analytic dynamics and motion of compact binaries are discussed within the most often applied Arnowitt–Deser–Misner formalism. The obtention of autonomous Hamiltonians is achieved by the transition to Routhians. Order reduction
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$$\delta \mathcal {N}$$ formalism on the past light-cone Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-05 Giuseppe Fanizza, Giovanni Marozzi, Matheus Medeiros
We apply the gradient expansion approximation to the light-cone gauge, obtaining a separate universe picture at non-linear order in perturbation theory within this framework. Thereafter, we use it to generalize the \(\delta \mathcal {N}\) formalism in terms of light-cone perturbations. As a consistency check, we demonstrate the conservation of the gauge invariant curvature perturbation on uniform density
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Local first law of black hole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-07 Pabitra Tripathy, Pritam Nanda, Amit Ghosh
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Distinguishing cosmological models through quantum signatures of primordial perturbations Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-05-08 Rathul Nath Raveendran, Sumanta Chakraborty
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Novel regular black holes: geometry, source and shadow Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-29 Anjan Kar, Sayan Kar
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Granda–Oliveros dark energy in non-conserved gravity theory Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-27 H. R. Fazlollahi
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Review on the matching conditions for the tidal problem: towards the application to more general contexts Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-22 Eneko Aranguren, Raül Vera
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The role of dimension and electric charge on a collapsing geometry in Einstein–Gauss–Bonnet gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-18 Byron P. Brassel
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General relativistic approach to the vis-viva equation on Schwarzschild metric Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-15 Qi Peng, Shuichiro Yokoyama, Kiyotomo Ichiki
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Relativistic correction to black hole entropy Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-13 Naman Kumar
In this paper, we study the relativistic correction to Bekenstein–Hawking entropy in the canonical ensemble and isothermal–isobaric ensemble and apply it to the cases of non-rotating BTZ and AdS-Schwarzschild black holes. This is realized by generalizing the equations obtained using Boltzmann–Gibbs (BG) statistics with its relativistic generalization, Kaniadakis statistics, or \(\kappa \)-statistics
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Three-dimensional AdS black holes in massive-power-Maxwell theory Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-12 B. Eslam Panah, K. Jafarzade, Á. Rincón
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Physical analysis of spherical stellar structures in $$f(\textrm{Q},\textrm{T})$$ theory Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-09 M. Zeeshan Gul, M. Sharif, Adeeba Arooj
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On the weak and strong field effects in antiscalar background Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-08 Eduard Mychelkin, Maxim Makukov, Gulnara Suliyeva, Nosratollah Jafari
The triumph of general relativity under the banner “gravity is geometry” began with confirming the crucial effects within the Solar system and proceeded recently to the strong-field shadow effect for the compact object in the center of the Milky Way. Here, we examine some of those phenomena for the Einstein-scalar equations in the antiscalar regime to reveal the difference from vacuum both in weak
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Compact stars in Rastall gravity: hydrostatic equilibrium and radial pulsations Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-06 Juan M. Z. Pretel, Clésio E. Mota
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A novel model of non-singular oscillating cosmology on flat Randall–Sundrum II braneworld Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-06 Rikpratik Sengupta
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More solutions for the Wheeler–DeWitt equation in a flat FLRW minisuperspace Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-04 Chia-Min Lin
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Compactness bound of Buchdahl–Vaidya–Tikekar anisotropic star in $$D\ge 4$$ dimensional spacetime Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-04-04 Samstuti Chanda, Ranjan Sharma
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Quantum kinetic approach to the Schwinger production of scalar particles in an expanding universe Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-03-29 Anastasia V. Lysenko, Oleksandr O. Sobol
We study the Schwinger pair creation of scalar charged particles by a homogeneous electric field in an expanding universe in the quantum kinetic approach. We introduce an adiabatic vacuum for the scalar field based on the Wentzel–Kramers–Brillouin solution to the mode equation in conformal time and apply the formalism of Bogolyubov coefficients to derive a system of quantum Vlasov equations for three
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Renormalized stress-energy tensor on global anti-de Sitter space-time with Robin boundary conditions Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-03-28 Thomas Morley, Sivakumar Namasivayam, Elizabeth Winstanley
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Investigating the physical properties of traversable wormholes in the modified f(R, T) gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-03-19 Jianbo Lu, Mou Xu, Jing Guo, Ruonan Li
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Interaction of gravitational waves with Yang–Mills fields Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-03-01 Narasimha Reddy Gosala, Arundhati Dasgupta
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Beyond Schwarzschild: new pulsating coordinates for spherically symmetric metrics Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-29 E. A. León, J. A. Nieto, A. Sandoval-Rodríguez, B. Martínez-Olivas
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Quasinormal modes of anyons Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-24 Vishnulal Cheriyodathillathu, Saurya Das, Soumen Basak
We derive the quasinormal modes of anyons for \((2+1)\)-dimensional Bañados, Teitelboim, and Zanelli (BTZ) and analogue black holes and discuss potential experiments to measure these modes.
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Vector bosons in the rotating frame of negative curvature wormholes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-23 Abdullah Guvendi, Semra Gurtas Dogan
In this study, we investigate the relativistic dynamics of vector bosons within the context of rotating frames of negative curvature wormholes. We seek exact solutions for the fully-covariant vector boson equation, derived as an excited state of zitterbewegung. This equation encompasses a symmetric rank-two spinor, enabling the derivation of a non-perturbative second-order wave equation for the system
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Relativistic and nonrelativistic Landau levels for the noncommutative quantum Hall effect with anomalous magnetic moment in a conical Gödel-type spacetime Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-21 R. R. S. Oliveira
In this paper, we analyze the relativistic and nonrelativistic energy spectra (fermionic Landau levels) for the noncommutative quantum Hall effect with anomalous magnetic moment in the conical Gödel-type spacetime in \((2+1)\)-dimensions, where such spacetime is the combination of the flat Gödel-type spacetime with a cosmic string (conical gravitational topological defect). To analyze these energy
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Varying vacuum models with spatial curvature: a dynamical system perspective Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-21 Ashutosh Singh, Syamala Krishnannair
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Second-order cosmological perturbations produced by scalar–scalar coupling during inflation stage Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-20 Bo Wang, Yang Zhang
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The Dirac equation across the horizons of the 5D Myers–Perry geometry: separation of variables, radial asymptotic behaviour and Hamiltonian formalism Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-19 Qiu Shi Wang
We analytically extend the 5D Myers–Perry metric through the event and Cauchy horizons by defining Eddington–Finkelstein-type coordinates. Then, we use the orthonormal frame formalism to formulate and perform separation of variables on the massive Dirac equation, and analyse the asymptotic behaviour at the horizons and at infinity of the solutions to the radial ordinary differential equation (ODE)
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Cosmic growth in f(T) teleparallel gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-17 Salvatore Capozziello, Maria Caruana, Gabriel Farrugia, Jackson Levi Said, Joseph Sultana
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Stability aspects of an LRS Bianchi type-I cosmological model in f(Q) gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-16 Shivangi Rathore, S. Surendra Singh
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Dynamics of the universe with variable parameters that govern the gravitational interactions Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-16 R. K. Mishra, Navya Jain
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Gravitational fields of axially symmetric compact objects in 5D space–time–matter gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-15 J. L. Hernández–Pastora
In the standard Einstein’s theory the exterior gravitational field of any static and axially symmetric stellar object can be described by means of a single function from which we obtain a metric into a four-dimensional space–time. In this work we present a generalization of those so called Weyl solutions to a space–time–matter metric in a five-dimensional manifold within a non-compactified Kaluza–Klein
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Deep learning waveform anomaly detector for numerical relativity catalogs Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-15 Tibério Pereira, Riccardo Sturani
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Global existence and completeness of classical solutions in higher dimensional Einstein–Klein–Gordon system Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-14 Mirda Prisma Wijayanto, Fiki Taufik Akbar, Bobby Eka Gunara
In this paper we study the global existence and completeness of classical solutions of gravity coupled a scalar field system called Einstein–Klein–Gordon system in higher dimensions. We introduce a new ansatz function to reduce the problem into a single first-order integro-differential equation. Then, we employ the contraction mapping in the appropriate Banach space. Using Banach fixed theorem, we
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Deflection angle and shadow of slowly rotating black holes in galactic nuclei Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-08 A. El Balali, M. Benali, M. Oualaid
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Competitive effects between gravitational radiation and mass variation for two-body systems in circular orbits Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-07 Baptiste Blachier, Aurélien Barrau, Killian Martineau, Cyril Renevey
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An alternative unified formulation of gravitation and electromagnetism in four dimensions Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-05 Nazim Djeghloul, M. Aris Kellou
We show how the introduction of a rank two antisymmetric tensor within the construction of the spacetime contortion sets the geometric framework in which gravitation and electromagnetism can be formulated synthetically through a unique action of Hilbert type in four dimensions. In particular, free Maxwell’s equations are recovered as a consequence of the field equations in the limit of metrically flat
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Rindler trajectories in cloud of strings in 3rd order Lovelock gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-02 M. Umair Shahzad, Aneela Sadaf
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Gravitational repulsive effects in 3D regular black holes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-01 Orlando Luongo, Hernando Quevedo, S. N. Sajadi
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Gravitational waves on charged black hole backgrounds in modified gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-31 Miguel Barroso Varela, Hugo Rauch
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On the existence of conformal Killing horizons in LRS spacetimes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-30 Abbas M. Sherif
Let M be a locally rotationally symmetric spacetime, and \(\xi ^a\) a conformal Killing vector for the metric on M, lying in the subspace spanned by the unit timelike direction and the preferred spatial direction, and with non-constant components. Under the assumption that the divergence of \(\xi ^a\) has no critical point in M, we obtain the necessary and sufficient condition for \(\xi ^a\) to generate
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Testing theories of gravity with planetary ephemerides Living Rev. Relat. (IF 40.6) Pub Date : 2024-01-29 Agnès Fienga, Olivier Minazzoli
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$$\kappa $$ -deformed power spectrum and modified Unruh temperature Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-29 Vishnu Rajagopal
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First-order quantum corrections of tunneling radiation in modified Schwarzschild–Rindler black hole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-29 Riasat Ali, Xia Tiecheng, Rimsha Babar
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Dirac Fermions around Schwarzschild black holes with quintessence Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-29 Marina-Aura Dariescu, Ciprian Dariescu
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Invariant description of static and dynamical Brans–Dicke spherically symmetric models Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-24 Nicholas T. Layden, Alan A. Coley, Dipanjan Dey
We investigate spherically symmetric static and dynamical Brans–Dicke theory exact solutions using invariants and, in particular, the Newman Penrose formalism utilizing Cartan scalars. In the family of static, spherically symmetric Brans–Dicke solutions, there exists a three-parameter family of solutions, which have a corresponding limit to general relativity. This limit is examined through the use
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Conformal Ricci solitons on Vaidya spacetime Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-24 Zosangzuala Chhakchhuak, Jay Prakash Singh
The present paper focused on Vaidya spacetime admitting a conformal Ricci soliton. We derive the expressions for the four components of the associated vector field V and demonstrate that, under this condition, the spacetime reduces to the Schwarzschild spacetime. Furthermore, we determine the necessary expression for the potential function f to establish the existence of a conformal gradient Ricci
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Solution of Weyl–Lanczos relations for Morris–Thorne wormhole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-22 Sagar V. Soni, Ravi Panchal, A. H. Hasmani
Wormholes, theoretical structures that connect disparate regions of spacetime, present intriguing possibilities for interstellar travel and exploitation. By the technique of differential forms, we have obtained Ricci rotation coefficients. The Lanczos potential is derived from the Weyl–Lanczos equations and general observer quantities. Also, through analytical calculations, we quantify the influence
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On gravity as a medium property in Maxwell equations Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-19 Jai-chan Hwang, Hyerim Noh
The effect of gravity in Maxwell’s equations is often treated as a medium property. The commonly used formulation is based on managing Maxwell’s equations in exactly the same form as in Minkowski spacetime and expressing the effect of gravity as a set of constitutive relations. We show that such a set of Maxwell’s equations is, in fact, a combination of the electric and magnetic fields defined in two
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Unimodular gravity in covariant formalism Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-12 J. Klusoň, B. Matouš
In this short note we study unimodular gravity in Weyl-De Donder formalism. We find corresponding Hamiltonian and study consequence of the unimodular constraint on the conjugate covariant momenta. We also find covariant Hamiltonian for Henneaux-Teitelboim unimodular action and study corresponding equations of motion.
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Note on super-critical charged boson stars Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-08 Yves Brihaye, Betti Hartmann
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On sufficient conditions for degrees of freedom counting of multi-field generalised Proca theories Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-05 Sujiphat Janaun, Pichet Vanichchapongjaroen
We derive conditions which are sufficient for theories consisting of multiple vector fields, which could also couple to non-dynamical external fields, to have the required structure of constraints of multi-field generalised Proca theories, so that the number of degrees of freedom is correct. The Faddeev–Jackiw constraint analysis is used and is cross-checked by Lagrangian constraint analysis. To ensure
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Recent acceleration and future deceleration in Brans–Dicke theory Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-27 Kanchan Devi, Pankaj Kumar
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Black string thin-shell wormhole models supported with generalized Chaplygin gas Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-21 M. Z. Bhatti, Z. Yousaf, M. Yousaf
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The parameter planes of the spherically symmetric and static relativistic solutions for polytropes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-17 Jorge L. deLyra