Results 21 to 30 of about 2,224,936 (294)
Large-scale velocity dispersion and the cosmic web [PDF]
Monthly notices of the Royal Astronomical Society, 2018 Gravitational collapse in cosmological context produces an intricate cosmic web of voids, walls, filaments and nodes. The anisotropic nature of collisionless collapse leads to the emergence of an anisotropic velocity dispersion, or stress, that absorbs ...
M. Buehlmann, O. Hahn
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The central velocity dispersion of the Milky Way bulge [PDF]
Astronomy & Astrophysics, 2018 Context. Current spectroscopic and photometric surveys are providing a comprehensive view of the Milky Way bulge stellar population properties with unprecedented accuracy.
E. Valenti +11 more
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Evolution of dark matter velocity dispersion [PDF]
Journal of Cosmology and Astroparticle Physics, 2018 Cosmological perturbation theory for the late Universe dominated by dark matter is extended beyond the perfect pressureless fluid approximation by taking the dark matter velocity dispersion tensor as an additional field into account.
Alaric Erschfeld, S. Floerchinger
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Mode Analysis of Pt/LGS Surface Acoustic Wave Devices
Sensors, 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
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A HIGH STELLAR VELOCITY DISPERSION AND ∼100 GLOBULAR CLUSTERS FOR THE ULTRA-DIFFUSE GALAXY DRAGONFLY 44 [PDF]
, 2016 Recently a population of large, very low surface brightness, spheroidal galaxies was identified in the Coma cluster. The apparent survival of these ultra-diffuse galaxies (UDGs) in a rich cluster suggests that they have very high masses. Here, we present
P. V. Dokkum +8 more
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地球与行星物理论评, 2023 Surface wave tomography using dispersion data to obtain isotropic and anisotropic shear wave velocity structures is a very efficient approach to study regional and global tectonics and deformation and to probe high-resolution crustal, upper mantle and ...
Huajian Yao +4 more
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Estimation of the Soil Layers Thickness Using Multi-Chanel Analysis of Surface Waves and Surface Wave Dispersion Curve [PDF]
Journal of Structural and Construction Engineering, 2021 One of the most interesting topics in the geotechnical and geophysical engineering is the use of surface waves to characterize the earth subsurface layers.
Mehdi Hashemi Jokar +2 more
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A Dependence of the Tidal Disruption Event Rate on Global Stellar Surface Mass Density and Stellar Velocity Dispersion [PDF]
, 2017 The rate of tidal disruption events (TDEs), , is predicted to depend on stellar conditions near the super-massive black hole (SMBH), which are on difficult-to-measure sub-parsec scales. We test whether depends on kpc-scale global galaxy properties, which
O. Graur +6 more
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Age–velocity dispersion relations and heating histories in disc galaxies [PDF]
, 2016 We analyse the heating of stellar discs by non axisymmetric structures and giant molecular clouds (GMCs) in N-body simulations of growing disc galaxies.
M. Aumer, J. Binney, Ralph Schonrich
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The age–velocity dispersion relation of the Galactic discs from LAMOST–Gaia data [PDF]
, 2017 We present the age-velocity dispersion relation (AVR) in three dimensions in the solar neighbourhood using 3,564 commonly observed sub-giant/red-giant branch stars selected from LAMOST, which gives the age and radial velocity, and \emph{Gaia}, which ...
Jincheng Yu, Chao Liu
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