W Virginis variable
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W Virginis variables are a subclass of Type II Cepheids which exhibit pulsation periods between 10–20 days, and are of spectral class F6 – K2.
They were first recognized as being distinct from classical Cepheids by Walter Baade in 1942, in a study of Cepheids in the Andromeda Galaxy that proposed that stars in that galaxy were of two populations. The prototype is W Virginis.
See also
External links
- AAVSO Variable Star of the Month. W Virginis: Spring 2003 /