Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...134..319p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 134, no. 2, May 1984, p. 319-327.
Astronomy and Astrophysics
Astrophysics
13
Cepheid Variables, Light Curve, Stellar Oscillations, Stellar Spectrophotometry, Fourier Analysis, Stellar Color, Stellar Models, Ubv Spectra
Scientific paper
New UBVRI observations of the Population II Cepheid KZ Centauri have been obtained in order to improve observational data on the bump progression in Type II Cepheids. The light curve characteristics of this star are unique among the field BL Her stars, while about three globular cluster Cepheids have similar curves. Detailed Fourier decompositions of the light and color curves are given, and the results are compared with available theoretical models. Procedures are proposed for improved comparisons between accurate observations and detailed pulsation models. It is concluded that KZ Cen is in all respects a normal Population II Cepheid, and that it defines the resonance center of the bump progression sequence in the sense that its light curve has a relatively high degree of symmetry about light maximum.
Hansen Leif
Petersen Jørgen Otzen
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