Light variations and angular momentum loss from the He-strong magnetic chemically peculiar star HD 37776

Abstract

We present a principle component analysis of multicolour light variations of the He-strong magnetic chemically peculiar star HD 37776 and its (O-C) diagram. The period increase rate found, (dP/dt) / P = 5.5 x 10^{-6}/year, is consistent with the conception of angular momentum loss through magnetically confined stellar wind.

3 pages; to appear in the proceedings of Active OB-Stars: Laboratories for Stellar & Circumstellar Physics, S. Stefl, S. Owocki and A. Okazaki eds