Results 61 to 70 of about 2,951,981 (325)
Biases in the estimation of velocity dispersions and dynamical masses for galaxy clusters [PDF]
EPJ Web of Conferences, 2020 Using a set of 73 numerically simulated galaxy clusters, we have characterised the statistical and physical biases for three velocity dispersion and mass estimators, namely biweight, gapper and standard deviation, in the small number of galaxies regime ...
Ferragamo A. +5 more
doaj +1 more source
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
semanticscholar +1 more source
EXPERIMENTAL STUDY OF LIQUID DISPERSION IN BUBBLE COLUMN
Diyala Journal of Engineering Sciences, 2008 The main object of this study is to investigate the influence of column diameter and superficial gas velocity on liquid phase dispersion coefficients (axial and radial dispersion coefficients), mixing times, gas holdup, and bubble dynamics (bubble ...
Hayder Abd Al-kaream Muhsin
doaj +1 more source
Geofluids, 2020 Wave-induced fluid flow is the main cause of seismic attenuation and dispersion. So the estimated velocity dispersion information can be used to identify reservoir fluid and effectively reduce the risk of reservoir drilling.
Yuanqiang Li +5 more
doaj +1 more source
MOND PREDICTION FOR THE VELOCITY DISPERSION OF THE “FEEBLE GIANT” CRATER II [PDF]
, 2016 Crater II is an unusual object among the dwarf satellite galaxies of the Local Group in that it has a very large size for its small luminosity. This provides a strong test of MOND, as Crater II should be in the deep MOND regime (gin ≈ 34 km2 s−2 kpc−1 ...
S. McGaugh
semanticscholar +1 more source
Frontiers in Astronomy and Space SciencesIntroduction: The properties of the S-bursts observed during the storm on 20–21 June 2022 in frequency band 10–32 MHz by the radio telescope URAN-2 are discussed in this paper.
V. V. Dorovskyy +3 more
doaj +1 more source
Velocity Dispersion of Ionized Gas and Multiple Supernova Explosions
Open Astronomy, 2015 We use 3D numerical simulations to study the evolution of the Hα intensity and velocity dispersion for single and multiple supernova (SN) explosions. We find that the IHα– σ diagram obtained for simulated gas flows is similar in shape to that observed in
Vasiliev E. O. +2 more
doaj +1 more source
THE SCALING OF STELLAR MASS AND CENTRAL STELLAR VELOCITY DISPERSION FOR QUIESCENT GALAXIES AT z < 0.7 [PDF]
, 2016 We examine the relation between stellar mass and central stellar velocity dispersion—the M*σ relation—for massive quiescent galaxies at z < 0.7. We measure the local relation from the Sloan Digital Sky Survey and the intermediate redshift relation from ...
Jabran Zahid +3 more
semanticscholar +1 more source
Hydraulic permeability prediction from attenuation in an oil well using the squirt flow model
Geofísica InternacionalA practical methodology is presented for estimating the hydraulic permeability from the wave attenuation at sonic frequencies using the poroelastic squirt flow model associated with the mechanism that encompasses the interaction between solid and fluid ...
Joseline Mena-Negrete +2 more
doaj +1 more source
JGE, 2020 In the hydrocarbon exploration, we need the method that result the direct hydrocarbon indicator to estimate the reservoir location and dimension accurately. It is a difficult and long standing problem.
Mokhammad Puput Erlangga +2 more
doaj +1 more source