CAOSP abstracts, Volume: 33, No.: 2, year: 2003
- Author(s): Dušek, J.; Mikulášek, Z.; Papoušek, J.
- Journal: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 33, no. 2, p. 119-133.
- Date: 06/2003
- Title: Preliminary analysis of light curves of seven carbon stars
- Keyword(s): AGB stars, carbon stars, individual stars, stellar pulsations, periods, gt;UBVgt; photometry, Hipparcos photometry
- Pages: 119 -- 133
Abstract:
We present a preliminary analysis of the light curves of the following carbon stars:
WZ Cas, VY UMa, Y CVn, RY Dra, T Lyr, HK Lyr and TT Cyg, constructed on the basis of our own
BV photoelectric observations obtained at the Brno Observatory in 1979-94 and Hipparcos observations.
The analysis suggests that "semiregular" light curves of all studied stars can faithfully be expressed by
a superposition of long-term changes and a set of medium-term harmonic variations (possibly pulsations) with periods from 50 to 500 days.
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