γ Doradus Stars: Defining a New Class of Pulsating Variables

In this paper we describe a new class of pulsating stars, the prototype of which is the bright, early, F‐type dwarf γ Doradus. These stars typically have between 1 and 5 periods ranging from 0.4 to 3 days with photometric amplitudes up to 0.1 mag in Johnson V . The mechanism for these observed variations is high‐order, low‐degree, nonradial, gravity‐mode pulsation.