Absolute and relative amplitudes of variations in radius of classical Cepheids

Details Absolute and relative amplitudes of variations in radius of classical Cepheids Absolute and relative amplitudes of variations in radius of classical Cepheids

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.150..223t&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 150, no. 2, Dec. 1988, p. 223-234.

Astronomy and Astrophysics

Astrophysics

Cepheid Variables, Stellar Luminosity, Stellar Oscillations, Light Curve, Periodic Variations, Radii, Variability

Scientific paper

On the basis of observational data for the absolute ΔR and relative ΔR/R amplitudes of variations in radius of galactic classical cepheids (55 stars from Balona and Stobie (1979) and 30 stars from Sollazzo et al. (1981)), four kinds of empirical linear relations are obtained: log (PΔV) - log ΔR, log P - log ΔR, log (PΔV) - log (ΔR/R), and log P - log (ΔR/R); P, R, and ΔV are the pulsation periods, the mean stellar radii, and the amplitudes of light variations, respectively. Three groups of stars are considered: short-period cepheids - with log P ≤ 1.1; long-period cepheids - with log P > 1.1; and s-cepheids.

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