Amplitude instability in pulsating stars - A one-zone model

Details Amplitude instability in pulsating stars - A one-zone model Amplitude instability in pulsating stars - A one-zone model

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...159..197a&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 159, no. 1-2, April 1986, p. 197-201.

Astronomy and Astrophysics

Astrophysics

7

Amplitude Modulation, Cepheid Variables, Stellar Evolution, Stellar Oscillations, White Dwarf Stars, Eigenvalues, Stellar Models, Stellar Orbits

Scientific paper

The author proposes to interpret the amplitude modulation in HR 7308 and also in RR Lyrae stars as an instability appearing at large amplitude during the star evolution. He numerically investigates this instability on a one zone model submitted to a variable external flux. The qualitative behavior of the modulation is in agreement with the observed one in HR 7308.

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