All Figures

$\begin{figure} \par\includegraphics[angle=-90,width=8.4cm,clip]{4142.fig1a}\includegraphics[angle=-90,width=8.4cm,clip]{4142.fig1b} \end{figure}$ Figure 1: The periodograms for the Geneva U ( left) and B ( right) data of HD 203664 after subsequent stages of prewhitening with the frequencies provided in the text. The amplitudes are expressed in magnitudes. The dashed horizontal line indicates the 4 $\sigma$ level determined as explained in the text.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=15.4cm,clip]{4142.fig2} \end{figure}$ Figure 2: Phase diagrams of the U ( left), B ( central), V ( right) lightcurves of HD 203664 for f₁ ( upper) and for f₂ after prewhitening with f₁( lower). The dots are the data and the full line is a sinusoidal fit with fixed indicated frequency. Note the different scale of the y-axes of the upper versus lower plots.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=14cm,clip]{4142.fig3} \end{figure}$ Figure 3: Observed amplitude ratios A_X/A_U (filled circles) and their uncertainties for the dominant mode with frequency f₁ of HD 203664, where A_X stands for any of the amplitudes in the seven Geneva filters U, B₁, B, B₂, V₁, V, G. The lines represent theoretical predictions in the non-adiabatic treatment of the oscillations for stellar models within the mass range $[12,16]~M_\odot$ during the main-sequence phase and fulfilling the error box in $T_{\rm eff}$ and $\log g$ derived in Sect. 2.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=14cm,clip]{4142.fig4} \end{figure}$ Figure 4: Same as Fig. 3, but for the mode with frequency f₂.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=14.3cm,clip]{4142.fig5} \end{figure}$ Figure 5: Theoretical frequency spectra for stellar models with $M=13~M_\odot$ , X=0.70, Z=0.02 without core overshooting from the ZAMS until the TAMS. The star's position is to the left of the vertical dashed-dot line according to the $T_{\rm eff}$ -range derived in Sect. 2. The symbol convention for the modes is as follows: squares for $\ell =0$ , triangles for $\ell =1$ , plus sign for $\ell =2$ , circles for $\ell =3$ . Higher $\ell$ -values are not shown for the sake of clarity. The observed frequency values f₁( $\ell =2$ ) and f₂ (likely $\ell =2$ ) are indicated by the horizontal lines. The vertical line indicates the model for which an exact match to f₁and f₂ is obtained for two zonal $\ell =2$ modes.
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In the text

$\begin{figure} \par\includegraphics[angle=-90,width=8.4cm,clip]{4142.fig1a}\includegraphics[angle=-90,width=8.4cm,clip]{4142.fig1b} \end{figure}$	Figure 1: The periodograms for the Geneva U ( left) and B ( right) data of HD 203664 after subsequent stages of prewhitening with the frequencies provided in the text. The amplitudes are expressed in magnitudes. The dashed horizontal line indicates the 4 $\sigma$ level determined as explained in the text.
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$\begin{figure} \par\includegraphics[angle=-90,width=15.4cm,clip]{4142.fig2} \end{figure}$	Figure 2: Phase diagrams of the U ( left), B ( central), V ( right) lightcurves of HD 203664 for f₁ ( upper) and for f₂ after prewhitening with f₁( lower). The dots are the data and the full line is a sinusoidal fit with fixed indicated frequency. Note the different scale of the y-axes of the upper versus lower plots.
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$\begin{figure} \par\includegraphics[angle=-90,width=14cm,clip]{4142.fig4} \end{figure}$	Figure 4: Same as Fig. 3, but for the mode with frequency f₂.
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