flare star

a dwarf star that exhibits sudden increases of magnitude similar to solar flares. Also called UV Ceti star.
[1950-55]

* * *

Star that varies in brightness repeatedly but sporadically, sometimes by more than one magnitude, within a few minutes.

The cause is thought to be the eruption of flares like those observed on the Sun but much larger (see solar flare). Proxima Centauri, in Alpha Centauri, the closest star to the Sun, is a flare star.

* * *

also called  Uv Ceti Star,  

      any star that varies in brightness, sometimes by more than one magnitude, within a few minutes. The cause is thought to be the eruption of flares much larger than, but otherwise similar to, those observed on the Sun. Flare stars are sometimes called UV Ceti stars, from a prototype star in the constellation Cetus. Proxima Centauri, the closest star to the Sun, is a flare star. All known flare stars are red dwarfs; flares in intrinsically brighter stars are not presently detectable. In UV Ceti and a few others, radio flares have been observed often corresponding to the optical outbursts.

* * *


Universalium. 2010.

Look at other dictionaries:

  • Flare star — A flare star is a variable star which can undergo unpredictable dramatic increases in brightness for a few minutes. It is believed that the flares on flare stars are analogous to solar flares in that they are due to magnetic reconnection in the… …   Wikipedia

  • flare star — noun a red dwarf star in which luminosity can change several magnitudes in a few minutes • Hypernyms: ↑red dwarf, ↑red dwarf star • Instance Hyponyms: ↑Proxima, ↑Proxima Centauri * * * noun : a star (as a faint red dwarf) tha …   Useful english dictionary

  • flare star — noun Astronomy a dwarf star which displays spasmodic outbursts of radiation, believed to be due to extremely intense flares …   English new terms dictionary

  • 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

  • Star Trek VI: The Undiscovered Country — Theatrical release poster by John Alvin Directed by Nicholas Meyer …   Wikipedia

  • Star Wars Episode IV: A New Hope — An original 1977 North American theatrical film poster by Tom Jung[1] Directed by George Lucas …   Wikipedia

  • Star lifting — is any of several hypothetical processes by which a highly advanced civilization (at least Kardashev II) could remove a substantial portion of a star s matter in a controlled manner for other uses. The term appears to have been coined by David… …   Wikipedia

  • flare — [fler] vi. flared, flaring [ME fleare < ?] 1. a) to blaze up with a sudden, bright light b) to burn unsteadily, as a flame whipped about by the wind 2. to burst out suddenly in anger, violence, etc.: often with up or out 3 …   English World dictionary

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

  • flare — I. noun Etymology: origin unknown Date: 1580 1. a. a fire or blaze of light used especially to signal, illuminate, or attract attention; also a device or composition used to produce such a flare 2. an unsteady glaring light b. solar flare; also a …   New Collegiate Dictionary

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.