Published in

Cambridge University Press, Proceedings of the International Astronomical Union, S302(9), p. 148-149, 2013

DOI: 10.1017/s1743921314001938

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Starspots on young solar-type stars

Journal article published in 2013 by Carolyn Brown, Brad Carter ORCID, Stephen Marsden, Ian Waite
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

AbstractDoppler 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.