Sentences with phrase «velocity dispersion of»

[19] The members of this cluster are orbiting the center of mass with a peak velocity dispersion of 7.9 km s − 1.

An elliptical galaxy's luminosity can be found from the velocity dispersion of the stars in the central few kiloparsecs of the galaxy.

An easier approach was developed 2 years ago, after astronomers found a strong correlation between a black hole's mass and the velocity dispersion of its host galaxy.

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.

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.

Now, a team led by Alister Graham of the Astrophysics Institute of the Canary Islands has taken the velocity dispersion approach one step further.

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.

For the inner few kiloparsecs of the elliptical galaxies, the velocity dispersion = 220 × (L / L *) 0.25, where L * is a characteristic galaxy luminosity (around 10 billion solar luminosities).

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.

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.

The elliptical galaxy's mass = k × (velocity dispersion) 2 × (the distance the stars are from the galaxy center) / G, where k is a factor that depends on the shape of the galaxy and the angle the galaxy is from Earth.

«Recent observations have revealed that there are a number of wide - velocity - dispersion compact clouds similar to CO -0.40-0.22.

«The really important piece of evidence was the measurement of velocity dispersion.

Masses can be determined from the dispersion in the measured velocities of individual stellar members of clusters.

The galaxy formed 11 billion years ago, and its star - forming gas has one of the highest ionized gas velocity dispersions ever measured.

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.