All Figures

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{0808fig1.eps}\end{figure}$ Figure 1: $\mbox{$\nu_{2}$ }$ versus $\mbox{$\nu_{1}$ }$ plot. The horizontal axis is the lower kHz QPO frequency $\mbox{$\nu_{1}$ }$ and the vertical axis is the upper kHz QPO frequency $\mbox{$\nu_{2}$ }$ . The kHz QPO data of four detected sample sources are plotted. The model presents a good consistence with the measured data for the NS averaged mass density parameters A=0.6, 0.7 and 0.8, which are shown in the three theoretical curves from bottom to top.
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In the text

$\begin{figure} \par\includegraphics[width=7.7cm,clip]{0808fig2.eps}\end{figure}$ Figure 2: $\Delta \nu$ versus $\mbox{$\nu_{1}$ }$ plot. The horizontal axis is the lower kHz QPO frequency $\mbox{$\nu_{1}$ }$ and the vertical axis is the twin kHz QPO frequency separation $\Delta \nu$ . The kHz QPO data of four detected sample sources are plotted. The model presents a good consistence with the measured data for the NS averaged mass density parameters A=0.6, 0.7 and 0.8, which are shown in the three theoretical curves from bottom to top.
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In the text

$\begin{figure} \par\includegraphics[width=7.9cm,clip]{0808fig3.eps}\end{figure}$ Figure 3: The ratio between the twin kHz QPO frequencies versus the lower kHz QPO frequency. The three theoretical curves represent the NS mass density parameter conditions with A=0.6, 0.7 and 0.8 from bottom to top. The data of four sample sources are plotted.
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In the text

$\begin{figure} \par\includegraphics[width=7.4cm,clip]{0808fig4.eps}\end{figure}$ Figure 4: The ratio between the twin kHz QPO frequencies versus the parameter $X\equiv R/r$ . The horizontal axis is Xand the vertical axis is the ratio $y=\mbox{$\nu_{2}$ }/\mbox{$\nu_{1}$ }$ . It is found that the theoretical curve is independent of the NS mass density parameter A. The two horizontal lines represent y=5:4 and y=5:3, from bottom to top, respectively, which cover the ratios of the detected kHz QPO data of the four samples.
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In the text

$\begin{figure} \par\includegraphics[width=7.9cm,clip]{0808fig3.eps}\end{figure}$	Figure 3: The ratio between the twin kHz QPO frequencies versus the lower kHz QPO frequency. The three theoretical curves represent the NS mass density parameter conditions with A=0.6, 0.7 and 0.8 from bottom to top. The data of four sample sources are plotted.
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