The hot γ Doradus and Maia stars

The hot gamma Doradus stars have multiple low frequencies characteristic of gamma Dor or SPB variables, but are located between the red edge of the SPB and the blue edge of the gamma Dor instability strips where all low-frequency modes are stable in current models of these stars. Though delta Sct stars also have low frequencies, there is no sign of high frequencies in hot gamma Dor stars. We obtained spectra to refine the locations of some of these stars in the H-R diagram and conclude that these are, indeed, anomalous pulsating stars. The Maia variables have multiple high frequencies characteristic of beta Cep and delta Sct stars, but lie between the red edge of the beta Cep and the blue edge of the delta Sct instability strips. We compile a list of all Maia candidates and obtain spectra of two of these stars. Again, it seems likely that these are anomalous pulsating stars which are currently not understood.