Magnetism of the He-weak star HR2949

Abstract

A magnetic field and rotational line profile variability (lpv) is found in the He-weak star HR2949. The field measured from metallic lines varies in a clearly non-sinusoidal way, and shows a phase lag relative to the morphologically similar HeI equivalent width variations. The surface abundance patterns are strong and complex, and visible even in the hydrogen lines.

2 pages, 1 figure, IAUS 272 - Active OB Stars: Structure, Evolution, Mass Loss and Critical Limits