Astrophysics (index)about

supergiant

(supergiant star)
(very large giant star)

Supergiant (or supergiant star) is a term generally used for a very bright giant star. The term is not precisely defined, but some general characteristics are:

-3 to -8 absolute magnitude
1000-1000000 × solar luminosity
30-1000 × solar
or .1-5 AU
radius
8-12 × solar mass
3500K-20000K temperature

Since brightness is the criteria, the radii can overlap with "non-super giant" stars.

Supergiants, can be red or blue, i.e., a very large red giant or a very large blue giant, and can be of different spectral classes. Qualifications used for some of the brightest:

Examples of supergiants:


(star type)
http://en.wikipedia.org/wiki/Supergiant_star

Referenced by:
Betelgeuse
Canopus
giant star
instability strip
luminosity class
Orion
Rigel
Thorne-Żytkow object (TZO)

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