The essential regularity of singular connections in geometryThis paper, a culmination of the authors' theory of the RT-equations, accomplishes the following: (i) We discover there is a true (geometric) regularity associated with every affine connection,…Moritz Reintjes, Blake Temple·May 28, 2026SaveLearn
Field Sources for Generalized Ellis-Bronnikov WormholeThe so-called generalized Ellis-Bronnikov wormhole is a modification of the standard Ellis-Bronnikov solution, in which a parameter m>2 is introduced-recovering the original Ellis-Bronnikov…T. M. Crispim, G. Alencar, C. R. Muniz·May 28, 2026SaveLearn
Emergence of phantom cold dark matter from spacetime diffusionGeneral relativity can be reconciled with quantum field theory without quantising the geometry only if the metric evolves stochastically. In this article, we explore the consequences of such a…Jonathan Oppenheim, Emanuele Panella, Andrew Pontzen·May 28, 2026SaveLearn
Shadows of naked singularities and superspinars related to the revisited Kerr-de Sitter spacetimesWe construct shadows of superspinars described by the revisited Kerr-de Sitter (rKdS) naked singularity (NS) spacetimes and compare them with those of the standard KdSNS spacetimes. For all the…Daniel Charbulák, Zdeněk Stuchlík·May 27, 2026SaveLearn
Signatures of loop quantum gravity in primordial black hole cosmologiesThe possibility that Dark Matter (DM) is partially or totally constituted by stable Planckian remnants of light Primordial Black Holes (PBHs), suggested for instance by Loop Quantum Gravity (LQG), is…Antoine Dierckx, Sébastien Clesse, Francesca Vidotto·May 27, 2026SaveLearn
When the Ringing Stops: Purely Imaginary Modes in the Ringdown Spectrum of Dynamical Black HolesWe extend the frequency-domain analysis of quasinormal modes in a dynamical, spherically symmetric black hole spacetime undergoing constant-rate mass evolution. In particular, we report a novel…Lodovico Capuano, Thomas Lovo, Gorka Prieto-Varela et al.·May 27, 2026SaveLearn
Greybody Factors, Absorption Cross Sections and Hawking Radiation of Holonomy-Corrected Schwarzschild Black HolesWe study greybody factors, absorption cross sections and Hawking energy-emission rates for minimally coupled massless scalar, electromagnetic and massless Dirac test fields on the…Bekir Can Lütfüoğlu, Javlon Rayimbaev, Bekzod Rahmatov et al.·May 27, 2026SaveLearn
A Covariant Chiral-Hydrodynamic Formulation of the Dirac Equation in Curved SpacetimeThe hydrodynamic formulation of the Dirac equation has historically been hindered by the inability to close the system of physical variables without resorting to infinite moment hierarchies. We…Jorge Meza-Domínguez, Tonatiuh Matos·May 27, 2026SaveLearn
Eccentric and unbound compact binaries in the LIGO-Virgo-KAGRA catalog: parameter estimation and waveform systematics with SEOBNRv6EHMOrbital eccentricity encodes key information about compact-binary formation channels and astrophysical environments, making it a critical target for gravitational-wave (GW) inference. We present…Lorenzo Pompili, Aldo Gamboa, Alessandra Buonanno·May 27, 2026SaveLearn
Accurate waveforms for generic planar-orbit binary black holes: The multipolar effective-one-body model SEOBNRv6EHMAccurate and computationally efficient waveform models are required to infer the parameters of compact binaries from their gravitational wave (GW) emission. Among these parameters, orbital…Aldo Gamboa, Alessandra Buonanno, Lorenzo Pompili et al.·May 27, 2026SaveLearn
First-Order Perturbations of Covariant Maxwell Equations in Gravitational WavesWe present a systematic theoretical framework for investigating first-order electromagnetic (EM) perturbations induced by gravitational waves (GWs). Beginning with the covariant Maxwell equations, we…Lingyue Lou, Haorong Wu, Xi-Long Fan·May 27, 2026SaveLearn
Perturbative dynamics and relativistic effects of a dyonic Kalb-Ramond black holeWe investigate perturbative dynamics, tidal effects, and relativistic frequency shifts in a dyonic Kalb-Ramond black hole generated by a Lorentz-violating antisymmetric tensor background. The…A. A. Araújo Filho·May 27, 2026SaveLearn
Distorting Kerr Images with Parity-Odd Scalar HairWe investigate thin-disk imaging of Kerr black holes with synchronized scalar hair, focusing on backreacted parity-odd excited states of a complex scalar field minimally coupled to Einstein gravity.…Qian Wan, Yehui Hou, Yang Huang et al.·May 27, 2026SaveLearn
Conformal Symmetry and Non-Singular Scalar field CollapseWe investigate the gravitational collapse of a massive scalar field in a conformally flat, spherically symmetric spacetime within general relativity. The collapsing matter distribution is modeled…Mohamed Aarif A, Soumya Chakrabarti·May 27, 2026SaveLearn
Scalar absorption beyond geometric optics in Klein-Gordon-separable Johannsen black hole spacetimesJohannsen metric is a natural and significant generalization of the Kerr metric, representing the most general stationary, axisymmetric spacetime that preserves the Carter constant of motion. The…Jining Tang, Yang Huang, Hongsheng Zhang·May 27, 2026SaveLearn
Dynamical Resolution of the Cosmic Coincidence Problem in Non-Interacting Holographic Dark Energy via Einstein-Cartan TorsionWe investigate the cosmic coincidence problem in non-interacting holographic dark energy with the Hubble radius as the infrared cutoff in Einstein-Cartan gravity. In general relativity, this cutoff…Yongjun Yun, Kyungduk Kim, Jungjai Lee·May 27, 2026SaveLearn
Shadow, acoustic redshift, and transfer observables of Lorentz-violating rotating acoustic black holesWe develop an impact-parameter-resolved transfer analysis for the rotating acoustic black hole with Lorentz symmetry violation. The background is the (2+1)-dimensional Lorentz-violating…Fernando M. Belchior, Edilberto O. Silva·May 27, 2026SaveLearn
Loop Quantum Kaluza-Klein Cosmology and InflationWe present the detailed analyses of five-dimensional loop quantum Kaluza-Klein cosmology based on the symmetric reduction of the connection formulation of the full theory. The previous results in a…Shengzhi Li, Yongge Ma, Faqiang Yuan et al.·May 27, 2026SaveLearn
Hidden symmetry group for particle orbits (timelike geodesics) in Schwarzschild spacetimeFor the timelike geodesic equations in Schwarzschild spacetime, three hidden conserved quantities were found recently, which are analogues of dynamical quantities related to the well-known…Stephen C. Anco, Mahdieh Gol Bashmani Moghadam·May 27, 2026SaveLearn
Thermodynamics, Phase Transitions, and Geodesic Structure of F(R)-Phantom Banados-Teitelboim-Zanelli (BTZ) Black HolesThis paper investigates phantom BTZ black holes within the high-curvature gravity theory framework, specifically using a special case of power-Maxwell theory, which functions as a nonlinear…Behzad Eslam Panah, Bilel Hamil, Manuel E. Rodrigues·May 27, 2026SaveLearn
May Negative Mass Objects exist in the sky?We conjecture the possibility of negative mass objects (NMOs) existing in the sky. It is shown that they may not be so exotic as usually expected. We show that NMOs appear as solutions of standard…Shin'ichi Nojiri, S. D. Odintsov·May 27, 2026SaveLearn
A class of d-dimensional regular black holes: Shadows, Thermodynamics and Gravitational collapseWe investigate a general class of d-dimensional regular black holes characterized by a de Sitter core, which arises from the gravitational collapse of a polytropic star with an arbitrary polytropic…A. Sadeghi, F. Shojai·May 27, 2026SaveLearn
The reason peculiar velocities grow faster in general relativity than in Newtonian gravityAn increasing number of surveys has been reporting large-scale peculiar motions with sizes and speeds in excess of those allowed by the concordance cosmological model. These are the so called bulk…Erick Pastén, Christos Tsagas·May 27, 2026SaveLearn
Light propagation and quasinormal modes of a topologically charged Schwarzschild-Klinkhamer wormholeIn this work, we present a theoretical analysis of null geodesics, critical photon orbits, and shadow formation associated with a wormhole generated by a geometric defect. The propagation of light in…C. F. S. Pereira, H. Belich, A. R. Soares et al.·May 27, 2026SaveLearn
General SIGW source for reheating dynamicsWorking in an arbitrary gauge, we derive the source term for scalar-induced gravitational waves (SIGW) valid during a general reheating epoch. The dominant energy component is allowed to transition…M. Laine, S. Procacci·May 27, 2026SaveLearn