Results 101 to 110 of about 407,723 (180)

Increased Molecular Gas Velocity Dispersion and Star Formation Efficiency in Barred Galaxy Centres

open access: yesThe Astronomical Journal
Work by the Physics at High Angular resolution in Nearby GalaxieS (PHANGS) collaboration found higher molecular gas surface densities and velocity dispersions in the centers of barred galaxies compared to unbarred galaxies.
Jennifer M. Laing, Christine D. Wilson
doaj   +1 more source

High resolution kinematics of galactic globular clusters. II. On the significance of velocity dispersion measurements [PDF]

open access: yes, 1993
Small number statistics may heavily affect the structure of the broadening function in integrated spectra of galactic globular cluster centers. As a consequence, it is a priori unknown how closely line broadening measure- ments gauge the intrinsic ...
Capaccioli, Massimo   +2 more
core   +2 more sources

Research on 3D frequency dispersion inverse imaging of channel wave in coal seam working face

open access: yesMeitan xuebao
At present, most of the techniques for inverting coal thickness through channel wave dispersion are based on the theoretical dispersion curve to select a single frequency for velocity CT tomography imaging, and the accuracy of the inverted coal thickness
Guangzhong JI   +6 more
doaj   +1 more source

Study on the Numerical Simulation of Array Sonic Logging Responses and Their Velocity Dispersion Characteristics in Fractured Formation

open access: yesCT Lilun yu yingyong yanjiu
To understand the effects of fractured formation on the responses of array sonic logging, the wave propagation of array acoustic logging was simulated based on the staggered grid finite difference method and poroelastic theory.
Hui LUO   +6 more
doaj   +1 more source

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