Preliminary analysis of light curves of seven carbon stars

Details Preliminary analysis of light curves of seven carbon stars Preliminary analysis of light curves of seven carbon stars

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003coska..33..119d&link_type=abstract

Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 33, no. 2, p. 119-133.

Astronomy and Astrophysics

Astronomy

1

Agb Stars, Carbon Stars, Individual Stars, Stellar Pulsations, Periods, Ubv Photometry, Hipparcos Photometry

Scientific paper

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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