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Starspots on Young Solar-Type Stars

Published online by Cambridge University Press:  07 August 2014

Carolyn Brown ,
Brad Carter ,
Stephen Marsden  and
Ian Waite
Carolyn Brown
Affiliation:
Computational Engineering and Science Research Centre, University of Southern Queensland, Toowoomba, Australia email: carolyn.brown@usq.edu.au
Brad Carter
Affiliation:
Computational Engineering and Science Research Centre, University of Southern Queensland, Toowoomba, Australia email: carolyn.brown@usq.edu.au
Stephen Marsden
Affiliation:
Computational Engineering and Science Research Centre, University of Southern Queensland, Toowoomba, Australia email: carolyn.brown@usq.edu.au
Ian Waite
Affiliation:
Computational Engineering and Science Research Centre, University of Southern Queensland, Toowoomba, Australia email: carolyn.brown@usq.edu.au
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Abstract

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Doppler Imaging of starspots on young solar analogues is a way to investigate the early history of solar magnetic activity by proxy. Doppler images of young G-dwarfs have yielded the presence of large polar spots, extending to moderate latitudes, along with measurements of the surface differential rotation. The differential rotation measurement for one star (RX J0850.1-7554) suggests it is possibly the first example of a young G-type dwarf whose surface rotates as almost a solid body, in marked contrast to the differential rotation of other rapidly rotating young G-dwarfs and the present-day Sun. Overall, our Doppler imaging results show that the young Sun possessed a fundamentally different dynamo to today.

Keywords

stars: activitystars: imagingstars: spots
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S302: Magnetic Fields throughout Stellar Evolution , August 2013 , pp. 148 - 149
Copyright
Copyright © International Astronomical Union 2014 

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