The cause of the Type I intermittency for hydrodynamic pulsation models

Details The cause of the Type I intermittency for hydrodynamic pulsation models The cause of the Type I intermittency for hydrodynamic pulsation models

Nov 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988ap%26ss.149..149a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 149, no. 1, Nov. 1988, p. 149-161.

Astronomy and Astrophysics

Astrophysics

18

Astronomical Models, Helium Hydrogen Atmospheres, Hydrodynamic Equations, Intermittency, Nonstabilized Oscillation, Stellar Oscillations, Gas Ionization, Helium, Positive Ions, Radiation Pressure, Shock Waves, Wave Generation

Scientific paper

One of the models which have stable limit cycles but are very close to the transition of the type I intermittency is examined in some detail. The work integrals are calculated for nonlinear oscillations with various amplitudes. The model reaches its limit cycle by saturation of the driving forces due to the ionized helium (He+) ionization. By increasing amplitudes damping becomes superior to the driving forces and so the limit cycle is stable. However, with even larger amplitudes the model becomes pulsational unstable indicating a large positive contribution to the work integral at rather deep interior.

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