Astrophysics (Index)About

high-velocity star

(star moving noticeably faster than neighbors)

A high-velocity star is a star moving significantly faster than the vast majority. Typical criteria are 65 km/s or 100 km/s relative to other stars. Some such stars (runaway stars) appear to have been boosted by some event such as a supernova or a stellar encounter involving a binary star. Others appear to be in the higher-velocity portion of large elliptical orbits stretching into the galactic halo, often apparently very old stars. A few are traveling so fast they appear to near or exceed the Milky Way's escape velocity (hypervelocity star).


(star type,stellar kinematics)
Further reading:
https://en.wikipedia.org/wiki/Stellar_kinematics#High-velocity_stars
https://www.oxfordreference.com/display/10.1093/oi/authority.20110803095936367
https://www.britannica.com/science/high-velocity-star
https://ui.adsabs.harvard.edu/abs/2021ApJS..252....3L/abstract

Referenced by pages:
hypervelocity star (HVS)
velocity kick

Index