is about 0.09 for the $\delta$-Sct stars. All the stars given in Table6 have larger ratios than those of the $\delta$-Sct stars except CoRot102980178. It has the smallest ratio with 0.072. This star is not clearly classified yet. It was classified as a $\gamma$-Dor pulsator by [@sok], however, the classification as a [Slowly Pulsating B star]{} (SPB) could not be ruled out. There are some doubts about the classifications of V551 Aur and KIC04544587. Both the Q-values and period ratios lead to classification of $\gamma$-Dor type pulsation. The pulsational period is connected to the mean density in the pulsating variables. The period-mean density relationship can be written as:

$$P_{puls}= Q \sqrt{\rho_{\odot}/\rho}$$

where Q is the pulsation constant, $\rho$ and $\rho_{\odot}$ are the mean density of the star and the sun. The mean density is expressed by the mass and radius of the star. Then the above equation can be rearranged to the form:

$$P_{puls}= Q \sqrt{ \frac{R_{puls}^3}{M_{puls}} }$$

where R$_{puls}$ and M$_{puls}$ are the radius and mass of the pulsating star. Solving the Kepler’s Third law for the mass of the pulsator and inserting to the above equation we obtain,

$$P_{puls}= Q \times P_{orb} \times \bigg\{G \times \frac{R_{puls}^3} {4\pi^2 \times 