Determining the distinction between elliptical galaxies and lenticular galaxies often relies on the measurements of velocity dispersion ( ? ), rotational velocity ( v ), and ellipticity ( ? ).
32.
The latest determination of the distance to Maffei 1, which is based on the re-calibrated luminosity / velocity dispersion relation for the elliptical galaxies and the updated extinction, is.
33.
Inverse Q filtering is a method to restore the energy loss due to energy dissipation ( amplitude compensation ) and to correct the time-shift of the data due to velocity dispersion.
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The NGC 3783 group has a mean velocity of 2, 903 ?26 km / s with respect to the Sun and a velocity dispersion of 190 ?24 km / s.
35.
Such methods, such as broad emission-line reverberation mapping ( BLRM ), Doppler measurements, velocity dispersion, and the M-sigma relation have not yet been well established.
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To explain the spread of the orbital elements, an initial velocity dispersion of ~ 400 m / s is required, but such a velocity spread should have dispersed the fragments much further.
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By combining a galaxy's central velocity dispersion with measurements of its central surface brightness and radius parameter, it is possible to improve the estimate of the galaxy's distance even more.
38.
Low-dispersion glasses are also employed in handling ultrashort pulses of light, in e . g . mode-locked lasers, to prevent pulse broadening by group velocity dispersion in the optical elements.
39.
When a plane wave propagates through a homogeneous viscoelastic medium, the effects of amplitude attenuation and velocity dispersion may be combined conveniently into a single dimensionless parameter, Q, the medium-quality factor.
40.
As a result, the envelope of the wave packet not only moves, but also " distorts, " in a manner that can be described by the material's group velocity dispersion.
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