Hydrodynamic models for the short-period, classical Cepheid, SU CAS

Details Hydrodynamic models for the short-period, classical Cepheid, SU CAS Hydrodynamic models for the short-period, classical Cepheid, SU CAS

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...181...25a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 181, no. 1, July 1987, p. 25-30.

Astronomy and Astrophysics

Astrophysics

10

Cepheid Variables, Hydrodynamic Equations, Stellar Models, Stellar Oscillations, Stellar Evolution, Stellar Luminosity, Stellar Spectrophotometry, Velocity Distribution, Vibration Mode

Scientific paper

The hydrodynamic models presently constructed for the classical Cepheid SU Cas cover three luminosities and temperatures in the 6200-6500 K range. Consideration of the linear stability and the stability of limiting pulsations of the models indicates that, at 479 solar luminosities, only the fundamental mode is possible, while at 955 the first overtone becomes possible, and only the second overtone is possible at 2239. Attention is given to the pulsation of SU Cas in light of stellar evolution calculations, and evidence concerning its pulsation mode is noted. It is concluded that SU Cas is almost certainly not an F-mode pulsator.

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