A5055430062- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Black Holes and Theoretical Physics
- Rheology and Fluid Dynamics Studies
- Fluid Dynamics and Vibration Analysis
- Fluid Dynamics and Turbulent Flows
- Nanofluid Flow and Heat Transfer
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- Geomagnetism and Paleomagnetism Studies
- Astrophysics and Cosmic Phenomena
- Vibration and Dynamic Analysis
- Noncommutative and Quantum Gravity Theories
- Stellar, planetary, and galactic studies
- Particle physics theoretical and experimental studies
- Planetary Science and Exploration
- Heat Transfer and Optimization
- Lattice Boltzmann Simulation Studies
- Quantum Electrodynamics and Casimir Effect
- Relativity and Gravitational Theory
- Advanced Differential Geometry Research
Valparaiso University
2024
University of Science and Technology of China
2024
Durham University
2020-2024
University of Chile
2020
Universidad de Santiago de Chile
2015-2019
In this study, we explore the potential of utilizing four Minkowski functionals, which can fully describe morphological properties large-scale structures, as a robust tool for investigating modified gravity, particularly on nonlinear and quasilinear scales. With assistance $N$-body simulation, employ functionals to probe Hu-Sawicki $f(R)$ gravity model. The focus is understanding extracted by their sensitivity gravity. Our analysis involves comprehensive examination cosmic variance arising...
A number of codes for general-relativistic simulations cosmological structure formation have been developed in recent years. Here we demonstrate that a sample these produce consistent results beyond the Newtonian regime. We simulate solutions to Einstein's equations dominated by gravitomagnetism -- vector-type gravitational field doesn't exist gravity and produces frame-dragging, leading-order post-Newtonian effect. calculate coordinate-invariant effect on intersecting null geodesics...
We present GRAMSES, a new pipeline for nonlinear cosmological N-body simulations in General Relativity (GR). This code adopts the Arnowitt-Deser-Misner (ADM) formalism of GR, with constant mean curvature and minimum distortion gauge fixings, which provides fully background independent framework relativistic cosmology. Employing constrained formulation, Einstein equations are reduced to set ten elliptical solved using multigrid relaxation adaptive mesh refinements (AMR), three hyperbolic...
We study the imprints of an effective dark energy fluid in large scale structure universe through observed angular power spectrum galaxies relativistic regime. adopt phenomenological approach that introduces two parameters $\{Q,\eta\}$ at level linear perturbations and allow to take into account modified clustering (or gravitational constant) anisotropic stress appearing models beyond $\Lambda$CDM. characterize by equation state parameter $w=-0.95$ various sound speed cases range...
We investigate the transverse modes of gravitational and velocity fields in $\Lambda$CDM, based on a high-resolution simulation performed using adaptive-mesh refinement general-relativistic $N$-body code GRAMSES. study generation vorticity dark matter field at low redshift, providing fits to shape evolution its power spectrum over range scales. By analysing gravitomagnetic vector potential, which is absent Newtonian simulations, haloes with masses ranging from...
General relativity predicts that the rotational momentum flux of matter twists spacetime via a vector gravitomagnetic (frame-dragging) field, which remains undetected in cosmology. This field induces an additional gravitational lensing effect; at same time, sources kinetic Sunyaev-Zel'dovich (kSZ) effect. The common origin these two effects allows us to probe signal their cross-correlations. In this paper, we explore possibility detecting $\Lambda$CDM by cross-correlating weak-lensing...
In this study, we explore the potential of utilizing four Minkowski functionals, which can fully describe morphological properties large-scale structures, as a robust tool for investigating modified gravity, particularly on non-linear and quasi-linear scales. With assistance N-body simulation, employ functionals to probe Hu-Sawicki f(R) gravity model. The focus is understanding morphorlogical extracted by their sensitivity gravity. Our analysis involves comprehensive examination cosmic...
We study the thermodynamics of a moving Schwarzschild black hole, identifying temperature and entropy in relativistic scenario. Furthermore, we set arguments framework relating invariant geometrical quantities under global spacetime transformations dispersion relation system. then extended these order to consider more general relations, identify criteria rule them out.
We address the generation of initial conditions (ICs) for {\sc gramses}, a code nonlinear general relativistic (GR) N-body cosmological simulations recently introduced in ref. [1]. gramses} adopts constant mean curvature slicing with minimal distortion gauge, where linear growth rate is scale-dependent, and standard method realising particle data not straightforwardly applicable. A new introduced, which positions particles are generated from displacement field realised matter power spectrum...