Stellar acoustics. II - Pulse resonance in giant star models

Details Stellar acoustics. II - Pulse resonance in giant star models Stellar acoustics. II - Pulse resonance in giant star models

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...282..527a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 282, July 15, 1984, p. 527-532.

Astronomy and Astrophysics

Astrophysics

4

Acoustic Propagation, Cepheid Variables, Giant Stars, Stellar Oscillations, Stellar Envelopes, Stellar Models, Velocity Distribution

Scientific paper

Radial pulsation and the propagation of acoustic pulses generated at the He+ ionization zone are investigated for radiative stellar envelopes in the linear nonadiabatic approximation. A pulse resonance condition is shown to be satisfied for models near the P2:P0 resonance of the Cepheid instability strip, and the time of arrival of the reflected pulse is shown to be in qualitative agreement with the properties of bump Cepheids of different periods.

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