A5086026754- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Black Holes and Theoretical Physics
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- High-pressure geophysics and materials
- Galaxies: Formation, Evolution, Phenomena
- Geophysics and Sensor Technology
- Noncommutative and Quantum Gravity Theories
- Solar and Space Plasma Dynamics
- Advanced Differential Geometry Research
- Seismology and Earthquake Studies
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Dark Matter and Cosmic Phenomena
- Relativity and Gravitational Theory
- Seismic Waves and Analysis
- Advanced Mathematical Physics Problems
- Earthquake Detection and Analysis
- Stability and Controllability of Differential Equations
- Magnetic confinement fusion research
- Geometry and complex manifolds
- Radiology practices and education
Federico Santa María Technical University
2018-2025
Universidad de Guadalajara
2014-2024
Embry–Riddle Aeronautical University
2021-2024
Universidad Michoacana de San Nicolás de Hidalgo
2017
Pennsylvania State University
2002-2003
Brownsville Public Library
2003
Centro de Investigación en Materiales Avanzados
2002
Isaac Newton Group
1996
We performed a detailed analysis of the detectability wide range gravitational waves derived from core-collapse supernova simulations using gravitational-wave detector noise scaled to sensitivity upcoming fourth and fifth observing runs Advanced LIGO, Virgo, KAGRA. use coherent WaveBurst algorithm, which was used in previous search for supernovae. As makes minimal assumptions on morphology signal, it can play an important role first detection event Milky Way. predict that signals...
We analyze the dynamical stability of black hole solutions in self-gravitating nonlinear electrodynamics with respect to arbitrary linear fluctuations metric and electromagnetic field. In particular, we derive simple conditions on Lagrangian which imply domain outer communication. show that these hold for several regular found by Ay\'on-Beato Garc\'{\i}a.
Abstract In this article, we analyze a 7-dimensional $BF$ theory that, upon dimensional reduction, transforms into an effective 4-dimensional action in which generic metric is involved. A constraint imposed such way that the Friedmann-Lema\^{i}tre-Robertson-Walker characterized by scale factor $a(t)=\mathrm{exp}(H_0 t)$ with Hubble constant $H_{0}=67.70 \,\rm [km\, s^{-1}\,Mpc^{-1}]$. We also compute barotropic parameter $\omega \equiv p/\rho$ from our solutions. Three different scenarios...
Abstract We develop and characterize a parameter estimation methodology for rotating core collapse supernovae based on the gravitational wave bounce phase real detector noise. Expanding evidence from numerical simulations deterministic nature of this emission about dependence ratio $\beta$ between rotational kinetic to potential energy, we propose an analytical model component which depends one phenomenological parameter. validate goodness with pool representative waveforms. use fitting...
We discuss the quasi-normal oscillations of black holes which are sourced by a nonlinear electrodynamic field. While previous studies have focused on computation frequencies for wave or higher spin equation fixed background geometry described such holes, here we compute first time coupled electromagnetic-gravitational linear perturbations. To this purpose, consider parametrized family Lagrangians electromagnetic field contains Maxwell Lagrangian as special case. In case, unique spherically...
We investigate in detail the asymptotic properties of tachyon cosmology for a broad class self-interaction potentials. The present approach relies on an appropriate re-definition field, which, conjunction with method formerly applied bibliography different context allows us to generalize dynamical systems study wider potentials beyond (inverse) square-law one. It is revealed that independent functional form potential, matter-dominated solution and ultra-relativistic (also matter-dominated)...
We present a follow-up method based on supervised machine learning (ML) to improve the performance in search of gravitational wave (GW) bursts from core-collapse supernovae (CCSNe) using coherent WaveBurst (cWB) pipeline. The ML model discriminates noise signal events by set reconstruction parameters provided cWB as features. Detected are discarded yielding reduction false alarm rate (FAR) and probability thus enhancing statistical significance. tested proposed strain data first half third...
We present a methodology based on the implementation of fully connected neural network algorithm to estimate temporal evolution high-frequency gravitational wave emission for core collapse supernova (CCSN). For this study, we selected deep (DNN) regression model because it can learn both linear and nonlinear relationships between input output data, is more appropriate handling large-dimensional offers high performance at low computational cost. To train Machine Learning (ML) algorithm,...
We investigate if a recently introduced formulation of general relativity on Weyl-integrable geometry contains cosmological solutions exhibiting acceleration in the present cosmic expansion. derive conditions to have expansion universe and obtain particular solution for Weyl scalar field describing model time concordance with data combination Planck + WP BAO SN.
Our aim in this work is to outline some physical consequences of the interaction between black holes and scalar field halos terms gravitational waves. In doing so, hole taken as a static spherically symmetric source, {\it i. e.} Schwarzschild hole, we within test approximation, considering that lives curved space-time outside hole. We focused on emission waves when perturbed by surrounding matter. The symmetries spacetime simplicity matter source allow, means spherical harmonic...
We present the results of a detailed study on detectability High Frequency Feature (HFF) in core-collapse supernova (CCSN) gravitational wave (GW) signals. applied Residual Neural Networks (ResNet50), one state-of-the-art deep learning architectures computer vision, to perform multi-class classification image samples built from time-frequency Morlet wavelet scalograms LIGO-Virgo noise plus CCSN GW consider three target labels for consecutive and mutually exclusive intervals which...
We apply the dynamical systems tools to study linear dynamics of a self-interacting scalar field trapped on DGP brane. The simplest kinds self-interaction potentials are investigated: (a) constant potential, and (b) exponential potential. It is shown that models can be very rich complex. One most interesting results this shows screening occurring within Minkowski cosmological phase model mimics 4D phantom behaviour, an attractor solution for potential but not one. In latter case...
A system of |$N$| Korteweg–de Vries equations coupled by the boundary conditions is considered in this paper. The configuration studied here one called star-shaped network, where inputs can act on a central node and external nodes. In literature, there recent result proving exact controllability using |$(N+1)$| controls. We succeed to remove input acting consequently we obtain with inputs.
In this work, we apply Convolutional Neural Networks (CNNs) to detect gravitational wave (GW) signals of compact binary coalescences, using single-interferometer data from real LIGO detectors. Here, adopted a resampling white-box approach advance towards statistical understanding uncertainties intrinsic CNNs in GW analysis. We used Morlet wavelets convert strain time series time-frequency images. Moreover, only worked with non-Gaussian noise and hardware injections, removing freedom set...
Gamma-ray bursts (GRBs) are produced during the propagation of ultra-relativistic jets. It is challenging to study jet close central source, due high opacity medium. In this paper, we present numerical simulations relativistic jets propagating through a massive, stripped envelope star associated long GRBs, breaking out and accelerating into circumstellar We compute gravitational wave (GW) signal resulting from show that key parameters can be directly determined by GW signal. The presents...
We apply the dynamical systems tools to study asymptotic properties of a cosmological model based on non-linear modification General Relativity in which standard Einstein-Hilbert action is replaced by one Dirac-Born-Infeld type. It shown that dynamics this extremely rich: there are found equilibrium points phase space can be associated with matter-dominated, matter-curvature scaling, de Sitter, and even phantom-like solutions. Depending value overall parameters show multi-attractor structure...
We present the results from a search for gravitational-wave transients associated with core-collapse supernovae observed optically within 30 Mpc during third observing run of Advanced LIGO and Virgo. No gravitational wave supernova has been identified. then report detection efficiency variety possible emissions. For neutrino-driven explosions, distance at which we reach 50% is up to 8.9 kpc, while more energetic magnetorotationally-driven explosions are detectable larger distances. The...
We review the post-Newtonian (PN) expansion for relativistic correction to motion of a binary system black holes. Using Newtonian formalism, we derive orbital equations 2nd order PN corrections, considering small velocities and weak fields. From wave equation obtained by approximation, find h+ h× polarization Gravitational Waves (GW) which could be detected Laser Interferometer Observatory (LIGO).
We explore the cosmological consequences of some possible big bang produced by a black-hole with mass $M$ in an 5D extended SdS. Under these particular circumstances, effective 4D metric obtained use constant foliation on extra coordinate is comported as false white-hole (FWH), which evaporates for all unstable modes that have wavelengths bigger than size FWH. Outside white hole repulsive gravitational field can be considered weak, so dynamics fluctuations inflaton and scalar perturbations...