Results 1 to 10 of about 547,861 (372)
On the Origin of the Variety of Velocity Dispersion Profiles of Galaxies [PDF]
The Astrophysical Journal, 2023 Observed and simulated galaxies exhibit a significant variation in their velocity dispersion profiles. We examine the inner and outer slopes of stellar velocity dispersion profiles using integral field spectroscopy data from two surveys, SAMI (for $z < 0.115$) and CALIFA (for $z < 0.03$), comparing them with results from two cosmological hydrodynamic ...
San Han +10 more
arxiv +2 more sources
Dispersion of Sound Velocity in Liquids [PDF]
Nature, 1937 As is now well known1, the spectral character of monochromatic light scattered by many liquids exhibits an observable change as the result of such scattering; an instrument of sufficiently high resolving power, for example, a Fabry-Perot etalon2, indicates the presence of Doppler-shifted components on either side of the main radiation. From this we are
B. V. Raghavendra Rao
openalex +2 more sources
In Search of the Largest Velocity Dispersion Galaxies [PDF]
Astrophysical Journal, 687, 828 (2008), 2008 We present Hobby-Eberly Telescope (HET) observations for galaxies at redshift z < 0.3 from the Sloan Digital Sky Survey (SDSS) showing large velocity dispersions while appearing to be single galaxies in HST images. The high signal-to-noise HET spectra provide more definitive velocity dispersions.
Salviander, Sarah +4 more
arxiv +7 more sources
Velocity Dispersions of Quiescent Galaxies in IllustrisTNG
The Astrophysical JournalWe 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
Wave Properties of Gas-Hydrate Bearing Sediments Based on Poroelasticity
Frontiers 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
Sensors, 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
A THEOREM ON CENTRAL VELOCITY DISPERSIONS [PDF]
The Astrophysical Journal, 2009 submitted to ...
An, Jin Hyeok, Evans, N. W.
openaire +3 more sources
Universe, 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
Effects of Velocity and Permeability on Tracer Dispersion in Porous Media
Applied 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
Frontiers 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