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Rapidly Evolving Structures in the Photosphere of the Mira Variable TX Cam

Published online by Cambridge University Press:  13 May 2016

P. J. Diamond  and
A. J. Kemball
P. J. Diamond
Affiliation:
MERLIN/VLBI National Facility, Jodrell Bank Observatory, University of Manchester, Macclesfield, Cheshire, SK11 9DL, U.K.
A. J. Kemball
Affiliation:
National Radio Astronomy Observatory, PO Box 0, Socorro, NM 87801, USA

Abstract

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44 VLBA observations of the 43 GHz SiO masers in the circumstellar envelope surrounding the Mira variable TX Cam reveal dramatic structural variations over the 80 week stellar cycle. The dominant dynamical mode is one of expansion although other complex motions are visible. The gravitational field of the star does not have a significant effect on the dynamics observed, these are probably governed more by the magnetic field and the effects of the shock waves resulting from the pulsation of the Mira itself.

Type
Star Formation Regions and Outflow Processes in our Galaxy
Information
Symposium - International Astronomical Union , Volume 205: Galaxies and their Constituents at the Highest Angular Resolutions , 2001 , pp. 252 - 255
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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