-
Interaction of gravitational waves with Yang–Mills fields Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-03-01 Narasimha Reddy Gosala, Arundhati Dasgupta
-
Beyond Schwarzschild: new pulsating coordinates for spherically symmetric metrics Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-29
Abstract Starting from a general transformation for spherically symmetric metrics where g_11=-1/g_00, we analyze coordinates with the common property of conformal flatness at constant solid angle element. Three general possibilities arise: one where tortoise coordinate appears as the unique solution, other that includes Kruskal-Szekeres coordinates as a very specific case, but that also allows other
-
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.
-
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
-
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
-
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
-
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
-
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)
-
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
-
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
Abstract This work deals with the dynamical system analysis of the Locally Rotationally Symmetric Bianchi type-I cosmological model in f(Q) gravity (where Q is the non-metricity). Here we Constructed cosmological models in f(Q) gravity which is based on the propositions of forms of f(Q). For the model, we take \(f(Q)=Q+\xi Q^{2}\) where \(\xi \) is constant. We reduce the evolution equation to an autonomous
-
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
-
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
-
Deep learning waveform anomaly detector for numerical relativity catalogs Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-02-15
Abstract Numerical Relativity has been of fundamental importance for studying compact binary coalescence dynamics, waveform modelling, and eventually for gravitational waves observations. As the sensitivity of the detector network improves, more precise template modelling will be necessary to guarantee a more accurate estimation of astrophysical parameters. To help improve the accuracy of numerical
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
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
-
$$\kappa $$ -deformed power spectrum and modified Unruh temperature Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-29
Abstract We study the power spectrum of the uniformly accelerating scalar field, obeying the \(\kappa \) -deformed Klein–Gordon equation. From this we obtain the \(\kappa \) -deformed corrections to the Unruh temperature, valid up to first order in the \(\kappa \) -deformation parameter a. We also show that in the small acceleration limit, this expression for the Unruh temperature in \(\kappa \) -deformed
-
Testing theories of gravity with planetary ephemerides Living Rev. Relat. (IF 40.6) Pub Date : 2024-01-29 Agnès Fienga, Olivier Minazzoli
-
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
-
Dirac Fermions around Schwarzschild black holes with quintessence Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-29 Marina-Aura Dariescu, Ciprian Dariescu
-
Invariant description of static and dynamical Brans–Dicke spherically symmetric models Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-24
Abstract 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
-
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
-
Solution of Weyl–Lanczos relations for Morris–Thorne wormhole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-22
Abstract 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
-
On gravity as a medium property in Maxwell equations Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-19
Abstract 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
-
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.
-
Note on super-critical charged boson stars Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2024-01-08 Yves Brihaye, Betti Hartmann
-
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
-
Recent acceleration and future deceleration in Brans–Dicke theory Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-27 Kanchan Devi, Pankaj Kumar
-
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
-
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
-
Sharma–Mittal holographic dark energy and scalar field in Bianchi type-I cosmology Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-19 Sibel Korunur
-
On a field tensor for gravity and electromagnetism Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-15 M. Normann
We show that a three rank Lanczos type tensor field is an appropriate choice to describe relativistic electromagnetic and gravitational effects. More precisely, we identify the irreducible field-decompositions of this tensor as gravitational and electromagnetic fields. A set of divergence equations are proposed as field equations for the unified field.
-
The post-Newtonian motion around an oblate spheroid: the mixed orbital effects due to the Newtonian oblateness and the post-Newtonian mass monopole accelerations Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-12 Lorenzo Iorio
When a test particle moves about an oblate spheroid, it is acted upon, among other things, by two standard perturbing accelerations. One, of Newtonian origin, is due to the quadrupole mass moment \(J_2\) of the orbited body. The other one, of order \({\mathcal {O}}\left( 1/c^2\right) \), is caused by the static, post-Newtonian field arising solely from the mass of the central object. Both of them concur
-
On the stability of electrostatics stars with modified non-gauge invariant Einstein-Maxwell gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-12-04 H. Ghaffarnejad, T. Ghorbani, F. Eidizadeh
-
Visualization and analysis of the curvature invariants in the Alcubierre warp-drive spacetime Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-18 José Rodal
-
Parametrization of the deceleration parameter in a flat FLRW universe: constraints and comparative analysis with the $$\Lambda $$ CDM paradigm Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-17 Himanshu Chaudhary, Saadia Mumtaz, Amine Bouali, Ujjal Debnath, G. Mustafa
-
Intrinsic flat stability of the positive mass theorem for asymptotically hyperbolic graphical manifolds Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-13 Armando J. Cabrera Pacheco, Melanie Graf, Raquel Perales
The rigidity of the Riemannian positive mass theorem for asymptotically hyperbolic manifolds states that the total mass of such a manifold is zero if and only if the manifold is isometric to the hyperbolic space. This leads to study the stability of this statement, that is, if the total mass of an asymptotically hyperbolic manifold is almost zero, is this manifold close to the hyperbolic space in any
-
Particle dynamics and shadow of a regular non-minimal magnetic black hole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-09 Ahmad Al-Badawi, M. Q. Owaidat
-
The impact of the non-coincidence gauge on the dark energy dynamics in f(Q)-gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-07 Andronikos Paliathanasis
-
Towards a bound on the Higgs mass in causal set quantum gravity Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-03 Gustavo P. de Brito, Astrid Eichhorn, Ludivine Fausten
-
Scalar and spinor quasi normal modes of a 2D dilatonic blackhole Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-04 Pabitra Gayen, Ratna Koley
-
Recovering semiclassical Einstein’s equation using generalized entropy Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-03 Naman Kumar
-
Weyl neutrinos in plane symmetric spacetimes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-01 Tekin Dereli, Yorgo Şenikoğlu
We investigate complex quaternion-valued exterior differential forms over 4-dimensional Lorentzian spacetimes and explore Weyl spinor fields as minimal left ideals within the complex quaternion algebra. The variational derivation of the coupled Einstein–Weyl equations from an action is presented, and the resulting field equations for both first and second order variations are derived and simplified
-
Thermality of horizon through near horizon instability: a path integral approach Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-11-01 Gaurang Ramakant Kane, Bibhas Ranjan Majhi
-
Searching for a secular variation of the gravitational constant using strong gravitational fields Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-31 T. D. Le
-
Mimetic Horava and surface terms Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-28 Ola Malaeb, Chireen Saghir
We consider mimetic Horava gravity, where the scalar field of mimetic gravity was used in the construction of diffeomorphism invariant models reducing to Horava gravity in the synchronous gauge. It will be shown that the gravitational action with the addition of the Gibbons–Hawking–York term and the mimetic Horava action are equivalent for manifolds whose topology is \(R \times \Sigma \), where \(\Sigma
-
Slowly-rotating compact objects: the nonintegrability of Hartle–Thorne particle geodesics Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-30 Kyriakos Destounis, Kostas D. Kokkotas
-
Geodesically completing regular black holes by the Simpson–Visser method Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-28 Kunal Pal, Kuntal Pal, Tapobrata Sarkar
-
Parameter constraints from shadows of Kerr–Newman-dS black holes with cloud strings and quintessence Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-28 Wenfu Cao, Wenfang Liu, Xin Wu
-
What makes a shear-free spherical perfect fluid be inhomogeneous with tidal effects? Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-25 Jonathan Hakata, Rituparno Goswami, Chevarra Hansraj, Sunil D. Maharaj
-
Null distance and Gromov–Hausdorff convergence of warped product spacetimes Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-19 Brian Allen
-
Colliding plane gravitational waves of unequal strength Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-17 Kamran Qadir Abbasi, Asghar Qadir
-
Charged dust in Einstein–Gauss–Bonnet models Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-15 Shavani Naicker, Sunil D. Maharaj, Byron P. Brassel
-
Exploring the possibility of interacting quintessence model as an alternative to the $$\Lambda $$ CDM model Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-15 Nandan Roy
-
The quasi-Keplerian motion in regular Bardeen spacetime Gen. Relativ. Gravit. (IF 2.8) Pub Date : 2023-10-14 Jie Li, Bo Yang, Yu Wang, Wenbin Lin