radial velocity

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radial velocity

n.
The velocity, or a component of the velocity, of an object as it moves toward or away from an observer, as a star or galaxy observed from Earth. Periodic changes in the radial velocities of stars may indicate the presence of orbiting planets even if the planets themselves are not directly observable.

radial velocity

n
(General Physics) the component of the velocity of an object, esp a celestial body, directed along a line from the observer to the object
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Noun1.radial velocity - velocity along the line of sight toward or away from the observerradial velocity - velocity along the line of sight toward or away from the observer
speed, velocity - distance travelled per unit time
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References in periodicals archive ?
"The instrument will be used in the photography of spectra which will help solve mysteries on the nature of starlight, stellar temperatures, and radial velocities."
One of the new aspects of the Gaia data released are radial velocities derived from Gaia spectra.
By measuring the radial velocities of stars, which can be influenced by the presence of planets around those stars, HARPS can allow for the detection of the planets around the stars.
Binary stars should have matching radial velocities. Finding matching velocities in the new study supported the theory that Kronos and Krios, though two light years apart, were a binary set.
The SW is an estimate of the variance of the radial velocities of the different particles within the radar volume.
The team discovered three additional longer-period planets in the system from the HARPS-N radial velocities.
A comparison of the axial and radial velocities, wall shear stresses, flux rates, and the streamlines with other existing model [7] has been studied also.
In this example, targets to the northeast (NE) of the radar station have negative radial velocities (dark colors), which means they are approaching the radar, and targets to the southwest (SW) of the radar station have positive radial velocities (light colors), which means they are departing the radar station.
Taking advantage of the high temporal and improved spatial resolution of the short range LIDAR employed in the 2013 field study, an improved alerting algorithm was devised, taking into account both spatial and temporal changes in the radial velocities measured along the arrival glide path.
In Figure 10(a), the radial velocities of TPs 1 to 8 are shown.
Figure 1 shows qualitatively what these radial velocities look like.