Starspots on young solar-type stars

Brown, Carolyn and Carter, Brad and Marsden, Stephen and Waite, Ian (2014) Starspots on young solar-type stars. In: International Astronomical Union Symposium No. 302 (IAU 302): Magnetic Fields throughout Stellar Evolution, 25-30 Aug 2013, Biarritz, France.

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Abstract

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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © International Astronomical Union 2014. Permanent restricted access to published version due to publisher copyright policy.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Agricultural, Computational and Environmental Sciences
Date Deposited: 05 Feb 2014 12:10
Last Modified: 21 Jun 2017 05:51
Uncontrolled Keywords: stars; imaging; spots
Fields of Research : 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0204 Condensed Matter Physics > 020402 Condensed Matter Imaging
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020107 Mesospheric, Ionospheric and Magnetospheric Physics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1017/S1743921314001938
URI: http://eprints.usq.edu.au/id/eprint/24510

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