Ap stars
Magnetic variable stars
Rapidly oscillating Ap star
A chemically peculiar star characterized by the presence of high-frequency non-radial oscillations, with periods that range between about 4 and 16 min. These variations have periods from about 5 to 20 minutes and low amplitudes (B < 10 mmag). They are consistent with acoustic (p mode) pulsations of low degree and high radial overtone.
roAp stars
Alpha2 Canum Venaticorum stars
Alpha2 CVn stars