Classical Cepheid light curves revisited

Details Classical Cepheid light curves revisited Classical Cepheid light curves revisited

Nov 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985pasp...97.1078s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 97, Nov. 1985, p. 1078-1085.

Astronomy and Astrophysics

Astronomy

69

Astronomical Photometry, Cepheid Variables, Light Curve, Stellar Oscillations, Amplitudes, Fourier Analysis, Phase Deviation, Stellar Color, Stellar Magnitude

Scientific paper

Fourier decompositions are made of the B, V, R, and I classical Cepheid observations of Moffett and Barnes. The Fourier diagrams for V agree very well with the corresponding plots of Simon and Lee. The B, R, and I diagrams resemble the plots for V, but with small, systematic shifts in the phases φ21 and φ31. The 2.5-day star, DT Cyg, is confirmed as a likely overtone pulsator by its anomalous position in the Fourier plots. Finally, the authors study the Fourier phase quantity φ41, and introduce phase-phase diagrams to look at the Hertzsprung progression. Discontinuities in these diagrams support the idea that the long-period and short-period Cepheids may reach their limit cycles in different ways.

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