Do young Suns undergo magnetic reversals?

Marsden, Stephen C. and Jeffers, Sandra V. and Donati, Jean-Francois and Mengel, Matthew W. and Waite, Ian A. and Carter, Brad D. (2010) Do young Suns undergo magnetic reversals? In: International Astronomical Union Symposium (IAUS 264): Solar and Stellar Variability: Impact on Earth and Planets , 3-7 Aug 2009, Rio de Janeiro, Brazil.

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Abstract

A key part of the modern-day regenerative solar magnetic dynamo is the reversal of the Sun's global magnetic field every eleven years. However, recent theoretical models indicate that young-rapidly rotating Sun-like stars may not always undergo full magnetic reversals, but instead may sometimes undergo 'attempted' reversals where the magnetic field declines in strength only to return with the same polarity. Using the technique of Zeeman Doppler imaging we have mapped the magnetic field topology of a small sample of young Sun-like stars at multiple epochs, and present tentative evidence of an 'attempted' magnetic field reversal on one of our stars.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: No
Item Status: Live Archive
Additional Information: © 2009 International Astronomical Union. Published version deposited in accordance with the copyright policy of the publisher.
Depositing User: Dr Brad Carter
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 31 May 2011 05:42
Last Modified: 20 Oct 2014 00:10
Uncontrolled Keywords: stars; late-type; imaging; magnetic fields
Fields of Research (FOR2008): 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 (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1017/S1743921309992535
URI: http://eprints.usq.edu.au/id/eprint/18186

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