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Velocity Dispersions of Quiescent Galaxies in IllustrisTNG

open access: yesThe Astrophysical Journal
We examine the central stellar velocity dispersion of subhalos based on IllustrisTNG cosmological hydrodynamic simulations. The central velocity dispersion is a fundamental observable that links galaxies with their dark matter subhalos.
Jubee Sohn   +3 more
doaj   +3 more sources

Cosmological Parameter Estimation Using Current and Future Observations of Strong Gravitational Lensing

open access: yesUniverse, 2022
The remarkable development of cosmology benefits from the increasingly improved measurements of cosmic distances, including absolute distances and relative distances.
Jing-Zhao Qi   +4 more
doaj   +1 more source

On the Utility of Horizontal-to-Vertical Spectral Ratios of Ambient Noise in Joint Inversion with Rayleigh Wave Dispersion Curves for the Large-N Maupasacq Experiment

open access: yesSensors, 2021
Horizontal-to-Vertical Spectral Ratios (HVSR) and Rayleigh group velocity dispersion curves (DC) can be used to estimate the shallow S-wave velocity (VS) structure. Knowing the VS structure is important for geophysical data interpretation either in order
Maik Neukirch   +5 more
doaj   +1 more source

Wave Properties of Gas-Hydrate Bearing Sediments Based on Poroelasticity

open access: yesFrontiers in Earth Science, 2021
Natural gas hydrates have the properties of ice with a microporous structure and its concentration in sediments highly affects the wave velocity and attenuation. Previous studies have performed investigations based on the measurements of laboratory data,
Wei Wang   +5 more
doaj   +1 more source

Dynamic fluid transport property of hydraulic fractures and its evaluation using acoustic logging

open access: yesPetroleum Exploration and Development, 2022
The existing acoustic logging methods for evaluating the hydraulic fracturing effectiveness usually use the fracture density to evaluate the fracture volume, and the results often cannot accurately reflect the actual productivity.
Huanran LI   +3 more
doaj   +1 more source

Effects of Velocity and Permeability on Tracer Dispersion in Porous Media

open access: yesApplied Sciences, 2021
During micro-scale tracer flow in porous media, the permeability and fluid velocity significantly affect the fluid dispersion properties of the media. However, the relationships between the dispersion coefficient, permeability, and fluid velocity in core
Yulong Yang   +9 more
doaj   +1 more source

The Case for the Fundamental MBH-σ Relation

open access: yesFrontiers in Physics, 2020
Strong scaling relations between host galaxy properties (such as stellar mass, bulge mass, luminosity, effective radius etc) and their nuclear supermassive black hole's mass point toward a close co-evolution.
Christopher Marsden   +3 more
doaj   +1 more source

Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

open access: yesApplied Sciences, 2023
Site velocity structure determination and stratigraphic division are important purposes of microtremor survey, and the precision of dispersion curves is an important factor affecting the accuracy of microtremor survey.
Xingang Mou   +5 more
doaj   +1 more source

A THEOREM ON CENTRAL VELOCITY DISPERSIONS [PDF]

open access: yesThe Astrophysical Journal, 2009
submitted to ...
An, Jin Hyeok, Evans, N. W.
openaire   +3 more sources

Mode Analysis of Pt/LGS Surface Acoustic Wave Devices

open access: yesSensors, 2020
Platinum (Pt) gratings on langasite (LGS) substrates are a widely used structures in high temperature surface acoustic wave (SAW) devices. Multiple modes can be excited in Pt/LGS SAW devices owing to the heavy weight of the Pt electrode and leaky waves ...
Hongsheng Xu   +8 more
doaj   +1 more source

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