AAS 195th Meeting, January 2000
Session 127. Variable Stars
Oral, Saturday, January 15, 2000, 2:00-3:30pm, Centennial III

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[127.05] Magnetic activity in a young solar-type star

G.A.J. Hussain, A. Collier Cameron (University of St Andrews, Scotland)

High resolution spectroscopic techniques are used to investigate the magnetic topology of the young, active K0 dwarf, AB Dor. The techniques of Doppler imaging and Zeeman Doppler imaging enable us to map brightness and magnetic flux distributions at the surfaces of rapidly rotating stars. Magnetic and brightness maps of AB Dor from 1996 December are presented here.

The magnetic field at the stellar corona can also be traced using fast moving H\alpha absorption transients, signatures of prominence-type complexes. We find that the coronal topology of AB Dor evolves much more quickly than the surface magnetic field.

GAJH acknowledges the support of a PPARC studentship over the course of this work.

If you would like more information about this abstract, please follow the link to http://star-www.st-and.ac.uk/~gajh. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: gajh@st-andrews.ac.uk

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