Astronomy:W Virginis variable
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Short description: Type of variable stars
W Virginis variables are a subclass of Type II Cepheids which exhibit pulsation periods between 10–20 days,[1] and are of spectral class F6 – K2.[2][3]
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.[4] The prototype is W Virginis.[1]
See also
References
- ↑ 1.0 1.1 Wallerstein, G. (2002). "The Cepheids of Population II and Related Stars". Publications of the Astronomical Society of the Pacific 114 (797): 689–699. doi:10.1086/341698. Bibcode: 2002PASP..114..689W.
- ↑ Strohmeier, W. (1972). Variable Stars. Oxford, New York: Pergamon Press. Bibcode: 1972vast.book.....S.
- ↑ Soszyński, I.; Udalski, A.; Szymański, M. K.; Kubiak, M.; Pietrzyński, G.; Wyrzykowski, Ł.; Szewczyk, O.; Ulaczyk, K. et al. (2008). "The Optical Gravitational Lensing Experiment. The OGLE-III Catalog of Variable Stars. II.Type II Cepheids and Anomalous Cepheids in the Large Magellanic Cloud". Acta Astronomica 58: 293. Bibcode: 2008AcA....58..293S.
- ↑ Webb, Stephen (1999). Measuring the Universe: The Cosmological Distance Ladder. Springer.
External links
- AAVSO Variable Star of the Month. W Virginis: Spring 2003 PDF / HTML
- OGLE Atlas of Variable Star Light Curves - W Virginis stars
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