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Magnetism of the He-weak star HR 2949†
Rivinius, Thomas; Wade, Gregg A.; Townsend, Richard H. D.; Shultz, Matthew; Grunhut, Jason H.; Stahl, Otmar; Stahl
AA(ESO, Chile), AB(RMC, Canada), AC(UW Madison, USA), AD(RMC, Canada), AE(RMC, Canada), AF(LSW/ZAH Heidelberg, Germany), AG()
Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU Symposium, Volume 272, p. 210-211
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stars: binaries, stars: early-type, stars: magnetic fields
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(c) 2011: Copyright © International Astronomical Union 2011
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A magnetic field and rotational line profile variability (lpv) is found in the He-weak star HR 2949. The field measured from metallic lines varies in a clearly non-sinusoidal way, and shows a phase lag relative to the morphologically similar He i equivalent width variations. The surface abundance patterns are strong and complex, and visible even in the hydrogen lines.

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