On the Theoretical Period-Radius Relation of Classical Cepheids

Details On the Theoretical Period-Radius Relation of Classical Cepheids On the Theoretical Period-Radius Relation of Classical Cepheids

Apr 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998apj...497l..43b&link_type=abstract

Astrophysical Journal Letters v.497, p.L43

Astronomy and Astrophysics

Astronomy

34

Stars: Variables: Cepheids, Galaxy: Stellar Content, Stars: Fundamental Parameters, Stars: Oscillations

Scientific paper

We present the results of a comprehensive theoretical investigation of the period-radius relation of classical Cepheids based on new sequences of full-amplitude, nonlinear, convective models constructed by adopting a wide range of both stellar masses and chemical compositions. In the period range 0.9<={log}P<=1.8 , very good agreement is found between theoretical predictions and current available data, whereas outside this range, at both shorter and longer periods, nonlinear radii attain intermediate values between empirical relations based on different Baade-Wesselink methods and photometric bandpasses.

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