AAS 202nd Meeting, May 2003
Session 8 Binary Stars
Poster, Monday, May 26, 2003, 9:20am-6:30pm, West Exhibit Hall

[Previous] | [Session 8] | [Next]

[8.04] V471 Tau: mapping magnetic activity in a pre-CV binary system.

G.A.J. Hussain (Harvard Smithsonian CfA), C. Allende Prieto (Univ. of Texas at Austin), S.H. Saar (Harvard Smithsonian CfA), A. Collier Cameron (Univ. of St Andrews, UK), M.D. Still (NASA GSFC)

The technique of Doppler imaging enables us to map starspots at the surfaces of rapidly rotating cool stars. Starspots are probes of magnetic activity, thus the locations of these spots also indicate where the strongest magnetic fields tend to emerge. We present surface spot maps of the K2V component of V471 Tau from 2001-2002. Our spot maps can be used (a) to show that magnetic activity is confined to high latitude regions in the K2V component, (b) to measure surface differential rotation of this component and (c) to evaluate spot lifetimes in rapid rotators. We conclude that the K2V component of V471 Tau shows a similar equator-pole lap-time as the Sun and that its surface spots last on the order of months.

If you would like more information about this abstract, please follow the link to http://cfa-www.harvard.edu/~ghussain. 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: ghussain@cfa.harvard.edu

[Previous] | [Session 8] | [Next]

Bulletin of the American Astronomical Society, 35 #3
© 2003. The American Astronomical Soceity.