T Tauri star

Any of a class of very young stars with masses less than about twice the Sun's.

Characterized by unpredictable changes in brightness, they represent an early stage in stellar evolution, having only recently been formed by the gravitational condensation of interstellar gas and dust. The energy by which they shine derives from the gravitational collapse itself. These young stars, though now contracting more slowly, are still relatively unstable and will remain so until their interior temperatures become high enough to support nuclear fusion for energy generation. More than 500 T Tauri stars have been observed.

* * *

      any of a class of very young stars having a mass of the same order as that of the Sun. So called after a prototype identified in a bright region of gas and dust known as the Hind's variable nebula, the T Tauri stars are characterized by erratic changes in brightness. They represent an early stage in stellar evolution, having only recently been formed by the rapid gravitational condensation of interstellar gas and dust. These young stars are relatively unstable, though contracting more slowly than before, and will remain in that condition until their interior temperatures become high enough to support thermonuclear reactions for energy generation. More than 500 T Tauri stars have so far been observed. The Sun is thought to have gone through the T Tauri stage in its early youth.

* * *


Universalium. 2010.

Look at other dictionaries:

  • T Tauri star — Drawing of a T Tauri star with a circumstellar accretion disc …   Wikipedia

  • T Tauri star — T Tauri star, any one of a group of very distant, variable stars found between clouds of dust and gas, usually associated with nebulae. ╂[< T Tauri, a star in the constellation Taurus, the prototype of these stars] …   Useful english dictionary

  • T Tauri star — noun a class of young visible stars having optical variability; they are often surrounded by a protoplanetary disc See Also: T Tauri …   Wiktionary

  • star cluster — Astron. a number of stars of common origin held together as a group by gravitational attraction. Cf. globular cluster, open cluster, stellar association. * * * ▪ astronomy Introduction  either of two general types of stellar assemblages held… …   Universalium

  • star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …   Universalium

  • Tauri (disambiguation) — Tauri can refer to *Tauri, the ancient inhabitants of Crimea. *Tau ri, the race in the fictional Stargate series. *The genitive form of taurus (e.g. in star designations) …   Wikipedia

  • Star — For other uses, see Star (disambiguation) …   Wikipedia

  • Star system — This article is about stars in outer space. For the Hollywood star system, see Star system (film). For a system of planets around a star, see Planetary system. A star system or stellar system is a small number of stars which orbit each other,[1]… …   Wikipedia

  • Star designation — Designations of stars (and other celestial bodies) are done by the International Astronomical Union (IAU). Many of the star names in use today were inherited from the time before the IAU existed. Other names, mainly for variable stars (including… …   Wikipedia

  • T Tauri — [ AAVSO visual light curve of T Tau showing a typical 200 day oscillatory interval. The plot is based upon averages of all observations received within one day, and lines connecting the observations have been added as a visual aid. ] Starbox… …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.