Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....99...66s&link_type=abstract
Astronomy and Astrophysics, vol. 99, no. 1, June 1981, p. 66-72. Research supported by the Consiglio Nazionale delle Ricerche.
Astronomy and Astrophysics
Astrophysics
29
Cepheid Variables, Stellar Mass, Stellar Spectrophotometry, Interstellar Extinction, Q Values, Radii, Star Distribution, Stellar Luminosity, Stellar Oscillations
Scientific paper
Caccin et al. (1981) have illustrated a new method for the determination of the radii of pulsating variables. The current investigation utilizes the new method for a more precise determination of the radii of classical cepheids. The radius of a radially pulsating star can be obtained by solving a certain implicit equation. The equation is solved for thirty cepheids considered by Pel (1976) in connection with his VBLUW observations. Attention is given to aspects of radius determinations, and masses and luminosities. It is believed that a full agreement of luminosities based on data obtained with the aid of the new method and theoretical luminosities has to be reached by means of a fully hydrodynamical treatment of the cepheid atmosphere, instead of introducing inhomogeneous models.
Caccin Bruno
Onnembo A.
Russo Gennaro
Sollazzo Cl.
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