A5009486023- Cosmology and Gravitation Theories
- Black Holes and Theoretical Physics
- Pulsars and Gravitational Waves Research
- Solar and Space Plasma Dynamics
- Astronomy and Astrophysical Research
- Adaptive optics and wavefront sensing
- Geophysics and Gravity Measurements
- Ionosphere and magnetosphere dynamics
- Planetary Science and Exploration
- Stellar, planetary, and galactic studies
- Atomic and Molecular Physics
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Laser-induced spectroscopy and plasma
- Gamma-ray bursts and supernovae
- Underwater Acoustics Research
- Analytical Chemistry and Sensors
- Homotopy and Cohomology in Algebraic Topology
- Advanced Fluorescence Microscopy Techniques
- Earthquake Detection and Analysis
- Flow Measurement and Analysis
- Quantum chaos and dynamical systems
- Photoreceptor and optogenetics research
- Plasma Diagnostics and Applications
- bioluminescence and chemiluminescence research
Universidad Juárez Autónoma de Tabasco
2019-2024
Gemini South Observatory
2022-2024
Consejo de Ciencia y Tecnología del Estado de Tabasco
2023
Universidad Estatal Península de Santa Elena
2017
Universidad Autónoma del Estado de México
2015-2016
Universidad Nacional Autónoma de México
2013-2014
We present an exact regular solution of Einstein equations for a static and spherically symmetric spacetime with matter distribution isotropic perfect fluid. The construction the is realized assigning potential [Formula: see text] integrating fluid condition pressure. resulting physically acceptable, i.e. geometry hydrostatic variable pressure density are positive monotonic decreasing functions, speed sound smaller than light. An important element this that its compactness value in...
Abstract The Gemini South telescope is now equipped with a new high-resolution spectrograph called the High-resolution Optical SpecTrograph (GHOST). This instrument provides high-efficiency, spectra covering 347–1060 nm in single exposure of either one or two targets simultaneously, along precision radial velocity spectroscopy utilizing an internal calibration source. It can operate at spectral element resolving power 76,000 56,000, and reach signal-to-noise ratio ∼5 1 hr on V ∼ 20.8 mag...
A relativistic, static and spherically symmetrical stellar model is presented, constituted by a perfect charged fluid. This represents generalization to the case of neutral fluid, whose construction made through solution Einstein-Maxwell equations proposing form gravitational potential $g_{tt}$ electric field. The choice field implies that this supports values compactness$u=GM/c^2R\leq 0.5337972212$, higher than without charge ($u\leq 0.3581350065$), being feature relevance get represent...
A model for low mass compact objects with compactness ratio $u\leq 0.06092997016$ is presented here. Density, pressure and sound speed are regular monotonic decreasing functions. The change between the central density $\rho_c$ on surface $\rho_b$ lower than $3.94\%$ maximum occurs biggest compactness, i.e. $\rho_c=1.039350237\rho_b$. This allows us to apply this case of stars in which variation very small. In particular, we can use PSR B0943 + 10, a quark star candidate, radius $R=2.6{\rm...
A stellar model with an electrically charged anisotropic fluid as a source of matter is presented. The radial pressure described by Chaplygin state equation, [Formula: see text], while the anisotropy text] annulled in center star regular and electric field, also center. density pressures tangential speed sound are regular, monotonically increasing. physically acceptable meets stability criteria Harrison–Zeldovich–Novikov respect cracking concept solution unstable region potentially stable...
Starting from a perfect fluid solution we constructed generalization with anisotropic pressures and regular geometry as well the pressures, density speed of sound, these are also positive monotonic decreasing functions. The sound is lower than light, that to say, condition causality not broken. model satisfies all energy conditions radial [Formula: see text] tangential speeds complies because this stable according stability criteria related concept cracking. maximum value compactness factor...
A static and spherically symmetric stellar model is described by a perfect charged fluid. Its construction done using the solution of Einstein–Maxwell equations for which we specify temporal metric electric field monotonic increasing function null in center. The density, pressure speed sound turn out to be regular functions, positive decreasing as radial distance. Also, lower than light, that say, it does not violate condition causality. value compactness [Formula: see text], so useful...
Abstract The self-generated electric and magnetic fields in laser induced plasmas (LIPs) air during the first 40 ns are experimentally investigated using different electric, optical techniques. To produce LIPs we used second third harmonics (532 355 nm) of a Nd:YAG nanosecond pulsed with range irradiance from <?CDATA ${{10}^{11}}$ ?> <?MML <mml:math><mml:mstyle displaystyle='true'><mml:mstyle...
We present an experimental investigation of the electric field potential and magnetic generated by a laser-induced plasma in air, for time delays 0 ≤ t 50 ns. The laser used is Nd : YAG, λ = 1064 nm, 10 ns at FWHM, irradiance applied I (1011–1012) W cm−2. find that collective effect charges form dynamic dipole distribution aligned with beam axis. This result explained based on mobility detected mapping near coaxial cable probe. Shadowgraphy fast photography techniques show ionization front...
Abstract This article presents the results of a week observations around 2 July 2019, total Chilean eclipse. The eclipse occurred between 19:22 and 21:46 UTC, with complete sun disc obscuration at 20:38–20:40 UTC (16:38–16:40 LT) over Andes Lidar Observatory (ALO) (30.3°S, 70.7°W). Observations were carried out using ALO instrumentation goal to observe possible eclipse‐induced effects on mesosphere lower thermosphere region (MLT; 75–105 km altitude). To complement our data set, we have also...
FRIDA is a diffraction limited imager and integral field spectrometer that being built for the Gran Telescopio Canarias. has been designed as collaborative project between institutions from México, Spain USA. In imaging mode will provide scales of 0.010, 0.020 0.040 arcsec/pixel in IFS spectral resolutions R ~ 1000, 4,500 30,000. starting systems integration scheduled to complete fully integrated system tests at laboratory by end 2015 be delivered GTC shortly after. this contribution we...
FRIDA (inFRared Imager and Dissector for the Adaptive optics system of Gran Telescopio Canarias (GTC)) is designed as a diffraction limited instrument that will offer broad narrow band imaging integral field spectroscopy capabilities with low, intermediate high (R ~ 30,000) spectral resolutions, to operate in wavelength range 0.9 – 2.5 μm. The unit based on monolithic image slicer IFS observing modes use same Teledyne 2Kx2K detector. be Nasmyth B GTC, behind adaptive (AO) system. key...
Abstract In this paper, we analyse an analytical solution of the Einstein–Maxwell field equations that considers matter with anisotropic pressures in a static and spherically symmetric geometry. We report manner which obtained solution, is by means Karmarkar condition. For model, assume state equation describes interaction from quarks P = ( c 2 ρ − 4 B g )/3 consider presence electric charge, can generate radial tangential are not equal. graphic manner, physical properties taking as...
This work conducts a Hamilton-Jacobi analysis of classical dynamical systems with internal constraints. We examine four systems, all previously analyzed by David Brown: three familiar components (point masses, springs, rods, ropes, and pulleys) one chosen specifically for its detailed illustration the Dirac-Bergmann algorithm's logical steps. Including this fourth system allows direct insightful comparison formalism, thereby deepening our understanding both methods. To provide thorough...
The Gemini South telescope is now equipped with a new high-resolution spectrograph called GHOST (the High-resolution Optical SpecTrograph). This instrument provides high-efficiency, spectra covering 347-1060 nm in single exposure of either one or two targets simultaneously, along precision radial velocity spectroscopy utilizing an internal calibration source. It can operate at spectral element resolving power 76000 56000, and reach SNR$\sim$5 1hr on V$\sim$20.8 mag target median site seeing,...
The unique and stunning spectroscopic properties of Green Fluorescent Protein (GFP) from the jellyfish Aequorea victoria, not to mention its remarkable structural stability, have made it one most widely studied used molecular tool in medicine, biochemistry, cell biology. Its high fluorescent quantum yield is due chromophore, structure responsible emitting green visible light when excited at 395 nm. Although noteworthy that there enormous available information wonderful luminescent GFP, fact...
Abstract This work highlights the use of tools that can perform multi-space directional multifrequency propagation measurements to drill horizontal wells in real time. The same provide information such as distance geological limits and orientation fluids through interpretations be executed time recorded mode. new concept principles involves tilted transverse antennas are sensitive tool with respect structure around well, enhancing decision making improving geo-position trajectory productive wells.
Abstract In this report we present the generalization of a solution to Einstein’s equations with perfect fluid for case Einstein–Maxwell fluid. The effect charge is reflected by parameter, ν , and its interval determined positivity condition from pressure in interior star. It shown that stable according Zeldovich criteria as well relation adiabatic index. compactness, u = GM / c 2 R charged model greater than it chargeless result presence charge. This allows represent stars high particular...