Dynamo in subsurface convective layers

Cantiello Matteo, matteo@kitp.ucsb.edu, Kavli Institute for Theoretical Physics, United States
Braithwaite Jonathan, jonathan@astro.uni-bonn.de, Argelander Institute for Astronomy

Abstract
We discuss dynamo action in convective layers very close to the surface of OB and A stars. Fields produced in these regions can reach the stellar surface via magnetic buoyancy. This might explain the weak magnetic fields found in the A stars and the intriguing surface phenomena of OB stars.