Hidden bipolarity in red supergiant winds

Details Hidden bipolarity in red supergiant winds Hidden bipolarity in red supergiant winds

2005-01-03

arxiv.org/abs/astro-ph/0501028v1

Astronomy and Astrophysics

Astrophysics

4 pages. 4 figures. Proceedings of the 7th European VLBI Network Symposium held in Toledo, Spain on October 12-15, 2004. Edito

Scientific paper

Many observations of late-type M stars show large near-spherical circumstellar envelopes, yet planetary nebulae and supernova remnants are frequently axisymmetric. We present VLBI and MERLIN observations of masers around the red supergiant S Per which show varying degrees of axisymmetry and a dynamically significant magnetic field. There is no evidence for rotation here or in most similar objects. We examine possible origins of the magnetic field.

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