Astrophysics (Index)About

S-type star

(type of star with lines indicating zirconium)

An S-type star is a star within the S-class, a spectral class indicating zirconium monoxide bands and spectral lines. They are cool giant stars (AGB stars). They generally have similar amounts of carbon and oxygen. The presence of zirconium indicates either convection (intrinsic S-star), or previous mass transfer in the manner of Algols (extrinsic S-star).

(star type,spectral class)
Further reading:

Referenced by pages:
chemically peculiar star (CP star)
rare designator prefixes
red giant
spectral class