peculiar velocity


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peculiar velocity

See peculiar motion.

peculiar velocity

[pə′kyül·yər və′läs·əd·ē]
(astronomy)
Superposed on the systematic rotation of the galaxy are individual motions of the stars; each star moves in a somewhat elliptical orbit and therefore shows a velocity of its own (peculiar velocity) to the local standard of rest, the standard moving in a circular orbit around the galactic center.
References in periodicals archive ?
In this study it has been shown that the standard formula of the luminosity distance implies that the peculiar velocity is a time varying velocity of light.