Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...146...11a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 146, no. 1, May 1985, p. 11-16.
Astronomy and Astrophysics
Astrophysics
7
Cepheid Variables, Dwarf Stars, Light Curve, Stellar Oscillations, Amplitudes, Color-Magnitude Diagram, Power Spectra, Resonance
Scientific paper
The light curve analysis of HR 4684 provides an observational indication of the presence in Delta Scuti stars of the parametric resonance mechanism suggested by Dziembowski (1977, 1980). Probably, this process plays a general role in the pulsation of dwarf stars, by exciting low order modes which, in a linear approach, should be stable, and limiting the pulsational amplitudes. Physical features and pulsational modalities, both in HR 4684 and in another Delta Scuti star (KW 207) agree with the assumption of the presence of parametric resonance phenomena in normal Delta Scuti stars.
Antonello Elio
Guerrero Gustavo
Mantegazza Luciano
Scardia Marco
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