Nonlinear stellar pulsation. III. Fourier decomposition of theoretical RRab models.

Details Nonlinear stellar pulsation. III. Fourier decomposition of theoretical RRab models. Nonlinear stellar pulsation. III. Fourier decomposition of theoretical RRab models.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...306..837f&link_type=abstract

Astronomy and Astrophysics, v.306, p.837

Astronomy and Astrophysics

Astrophysics

8

Stars: Variable, Oscillations, Hydrodynamics, Methods: Numerical

Scientific paper

The fundamental mode RR-Lyrae light and radial velocity curves presented in Feuchtinger & Dorfi (1994) are Fourier analysed and compared to observational data and other theoretical investigations. For the period range up to 0.8days the Fourier decomposition of the light curves reproduces the observed values for R_21_, {PHI}_21_ and {PHI}_31_. The comparison to Lagrangean investigations shows excellent agreement for the radial velocity Fourier parameters. In addition we are able to resolve the phase discrepancy problem at least for the short period range. For periods higher than 0.8days the Fourier phases {PHI}_21_ and {PHI}_31_ lie above the observed ranges. We discuss this problem in the context of a lack of observational data and convective energy transport.

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