Sentences with phrase «in velocity dispersion»
Not exact matches
«If you really want to have a precise mass measurement of the black hole in a specific galaxy, you'd better use the slightly more cumbersome velocity dispersion method,» Ferrarese says.
http://www.sciencemag.org/
The new method will be invaluable for statistical studies of large numbers of galaxies, says Laura Ferrarese of Rutgers University in Piscataway, New Jersey, co-discoverer of the velocity dispersion correlation.
The team accounted for this, and was able to show that the velocity dispersion or random motion of the RR Lyrae star population was very high relative to the other stars in the Milky Way's center.
Stars in a «well ordered» population are all moving coherently, with nearly the same velocity, whereas stars in a disordered population have a wider range of velocities, implying a greater spatial dispersion.
An elliptical galaxy's luminosity can be found from the velocity dispersion of the stars in the central few kiloparsecs of the galaxy.
Sandra Faber and Robert Jackson discovered in 1976 a simple relation between the spread of velocities (called the velocity dispersion) and the luminosity of elliptical galaxies.
A paper, titled «A High Stellar Velocity Dispersion and ~ 100 Globular Clusters for the Ultra Diffuse Galaxy Dragonfly 44,» describing their findings was published in the journal Astrophysical Journal Letters on Thursday.
Masses can be determined from the dispersion in the measured velocities of individual stellar members of clusters.
Those waves dominate the vertical velocity field in the mixed layer (vortex Rossby waves) and below the first hundred meters (near inertial waves) and they are responsible for the differences in the vertical transport properties under the various forcing fields as quantified by frequency spectra, vertical velocity profiles and vertical dispersion of Lagrangian tracers.