Carr criterion and mass gaps in non-singular primordial black hole formationNon-singular gravitational theories are expected to be relevant in the early universe. In this paper, we derive a set of effective Friedmann equations describing the dynamics of matter shells in the…Jens Boos, Arif Kağan Gündoğdu, Marek Hartenfels·May 28, 2026SaveLearn
Supermassive black hole seeds from direct collapse of CDM-curvature peaksWe study black hole (BH) formation from the nonlinear growth and collapse of primordial perturbations during the matter-dominated era. Modelling cold dark matter (CDM) as pressureless dust, we…Marco Galoppo, Marco Bruni, Tomohiro Harada·May 28, 2026SaveLearn
Light rings and optical appearances of naked singularities, solitons, and black holes in beyond Horndeski gravityWe investigate the geodesic structure and optical appearance of compact objects with primary scalar hair in shift- and parity-symmetric beyond Horndeski gravity. The analytic solution considered here…Hyat Huang, Jutta Kunz, Rashmi Uniyal et al.·May 28, 2026SaveLearn
Problems of cosmology on small scales of the UniverseSix challenges for the standard cosmological model ΛCDM are listed, which arise when comparing theoretical predictions with observational data on scales of ~1 Mpc. Different parameters of luminous…I. D. Karachentsev·May 28, 2026SaveLearn
Modified Entropy from Action PrincipleWe propose a modified gravity theory by extending the Einstein-Hilbert action with an arbitrary function of the Ricci scalar and the Kretschmann scalar invariants. The resulting modified Friedmann…A. Dehyadegari, A. Sheykhi·May 28, 2026SaveLearn
Gyroscopic Precession in Axisymmetric Kerr Spacetime: Horizon Regularity and Coordinate EffectsWe investigate gyroscopic precession along Killing and non-Killing timelike trajectories in Kerr spacetime using the covariant Frenet--Serret formalism. The precession frequency is analyzed for both…Paulami Majumder·May 28, 2026SaveLearn
Quantum transitions of vector vortex light in gravitational wavesWe develop a theoretical framework to describe the full interaction between vector vortex light fields and gravitational waves (GWs). Using perturbation theory and the canonical quantization of the…Haorong Wu, Xilong Fan·May 28, 2026SaveLearn
Landauer entropy of spacetimeBased on Landauer's principle, we provide a geometrical definition for the entropy of a given static, spherically symmetric spacetime. Considering a congruence of geodesics across a surface, one…J. M. Isidro, B. Koch, A. Rincon·May 28, 2026SaveLearn
A New Spin on Dissipative Tides: First-Post-Newtonian Effects in Compact Binary InspiralsTidal dissipation in spinning compact binaries imprints characteristic corrections on the late-inspiral gravitational-wave signal. We develop a next-to-leading order post-Newtonian description of…Anand Balivada, Abhishek Hegade K. R., Nicolás Yunes·May 28, 2026SaveLearn
Boundedness and decay for the conformal wave equation in Schwarzschild-AdS under dissipative boundary conditionsWe study the conformal wave equation g ψ+ 2l2 ψ= 0 on 4-dimensional Schwarzschild--Anti de Sitter spacetimes under dissipative boundary conditions. We prove boundedness and decay…Alex Tullini·May 28, 2026SaveLearn
Coulomb Sectors and Scattering for Maxwell-Higgs Fields on Schwarzschild and Slowly Rotating Kerr BackgroundsWe develop a small-data Maxwell--Higgs theory on Schwarzschild and slowly rotating Kerr black-hole exteriors for gauge-invariant nonnegative self-interactions near the trivial vacuum. The…Bobby Eka Gunara, Mulyanto, Fiki Taufik Akbar·May 28, 2026SaveLearn
Enhancing online estimation of CBC parameters with the low-latency MBTA analysisIn this paper, we describe the procedure implemented in the Multi-Band Template Analysis (MBTA) search pipeline to produce online posterior distributions of compact binary coalescence (CBC)…Florian Aubin, Inès Bentara, Damir Buskulic et al.·May 28, 2026SaveLearn
Massive boson stars: Stability and GW emission in head-on mergersWe investigate quartically self-interacting massive boson stars by constructing equilibrium sequences and performing dynamical evolutions. The mass curve M(|ϕc|) along these sequences develops…Bo-Xuan Ge·May 28, 2026SaveLearn
Inflation with Gauss-Bonnet Correction and Higgs PotentialWe investigate the cosmological inflation for the Einstein-Hilbert action plus the Higgs potential function and the Gauss-Bonnet term coupled with the Higgs scalar field through a dilaton-like…Zahra Ahghari, Mehrdad Farhoudi·May 28, 2026SaveLearn
Long-lived quasinormal modes and grey-body factors of supermassive black holes with a dark matter haloWe study quasinormal modes and grey-body factors of a massive scalar field in the background of a Schwarzschild black hole surrounded by a spherically symmetric galactic dark matter halo. The…Zainab Malik·May 28, 2026SaveLearn
Cauchy-horizon flux coefficients in the reduced Polyakov modelWe derive the leading Cauchy-horizon flux coefficient in the stationary reduced Polyakov sector of spherically symmetric charged black holes. For a nonextremal inner horizon with affine coordinate…Damien A. Easson·May 28, 2026SaveLearn
Effective matter sectors from modified entropiesWe present a general formalism linking modified entropy functions directly to a modified spacetime metric and, subsequently, to an effective matter sector of entropic origin. In particular, within…Ankit Anand, Sahil Devdutt, Kimet Jusufi et al.·May 28, 2026SaveLearn
Extreme-Mass-Ratio Inspirals Embedded in Dark Matter Halo: Existence of Homoclinic Orbit and Horizon-Induced ChaosWe study the existence of homoclinic orbit and the onset of chaotic motion for a massive particle moving around a Schwarzschild-like black hole embedded in a Dehnen-(1,4,5/2) type dark matter halo,…Surajit Das, Surojit Dalui, Bum-Hoon Lee et al.·May 28, 2026SaveLearn
Hawking radiation: black hole vs de SitterWe discuss the difference between the thermodynamics of black holes and thermodynamics of the de Sitter expansion. Both systems experience the Hawking radiation, but its impact on thermodynamics is…G. E. Volovik·May 28, 2026SaveLearn
Probing phase transitions of regular black holes in anti-de Sitter space with Lyapunov exponentWe investigate the relationship between thermodynamic phase transitions and the Lyapunov exponent of charged regular anti-de Sitter black holes in quasi-topological gravity. Our results show that the…Hao Xie, Si-Jiang Yang·May 28, 2026SaveLearn
Bonanno-Reuter regular black hole: quasi-resonances, grey-body factors and absorption cross-sections of a massive scalar fieldWe study quasinormal modes of a massive scalar field in the background of the regular, quantum-corrected Bonanno-Reuter black hole, which arises from the renormalization group improvement of the…Zainab Malik·May 28, 2026SaveLearn
Husain-Kuchař model as the Carrollian limit of the Holst termWe show how the Husain-Kuchař model can be understood as a Carrollian limit of the Holst term in the context of background-independent field theories described in terms of coframes and spin…J. Fernando Barbero G., Juan Margalef-Bentabol, Aitor Vicente-Cano et al.·May 28, 2026SaveLearn
Scalar field perturbations in Non-commutative Schwarzschild spacetime: Comparative analysis and Upper bound on non-commutativityThis work presents a comparative analysis of the quasi-normal modes and ringdowns of scalar field perturbations in the non-commutative Schwarzschild black hole spacetime, focusing on two distinct…Majid Karimabadi, Davood Mahdavian Yekta, S. A. Alavi·May 28, 2026SaveLearn
Optical Phenomena in a Non-Commutative Kalb-Ramond Black Hole SpacetimeThis work investigates additional gravitational features of a newly proposed black hole spacetime within Kalb-Ramond gravity, incorporating non-commutative corrections arising from a gauge-theoretic…A. A. Araújo Filho, N. Heidari, Iarley P. Lobo et al.·May 28, 2026SaveLearn
Warm Inflation in f(Q) gravityWe investigate warm inflation in the framework of f(Q) gravity within a Friedmann-Robertson-Walker spacetime. Unlike cold inflation, where the inflaton evolves in isolation, warm inflation features…Tuhina Ghorui, Prabir Rudra, Farook Rahaman et al.·May 28, 2026SaveLearn