Study of time-evolving hydrodynamic Cepheid models

Details Study of time-evolving hydrodynamic Cepheid models Study of time-evolving hydrodynamic Cepheid models

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986ap%26ss.119...37t&link_type=abstract

(IAU, Asian-Pacific Regional Meeting, 3rd, Kyoto, Japan, Sept. 30-Oct. 5, 1984) Astrophysics and Space Science (ISSN 0004-640X),

Astronomy and Astrophysics

Astrophysics

1

Cepheid Variables, Hydrodynamics, Stellar Evolution, Stellar Models, Stellar Oscillations, Temporal Distribution, Coupled Modes, Stellar Luminosity, Stellar Mass, Stellar Temperature

Scientific paper

Two hydrodynamic models of the Cepheids have been run, with a view to the presence of modal coupling near the blue edge of the Cepheid instability strip (where double-mode Cepheids are found observationally). The mass of the first model is predicted by stellar evolution theory; the second possesses reduced mass. Three modes are pulsationally unstable in the former, and two in the latter. These results are analyzed by the maximum entropy method, and component amplitudes are determined by least-squares fitting for the periods obtained.

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