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Persistent Active Longitudes in Sunspot Activity: Sun-as-a-Star Approach
Published online by Cambridge University Press: 26 May 2016
Abstract
Using a new Sun-as-a-star approach we analyze sunspot group data for the past 120 years and reveal that sunspots are formed preferably in two persistent migrating active longitudes 180° apart. Their migration is determined by changes of the mean latitude of sunspots and the surface differential rotation. The two active regions periodically alternate being the dominant region with a period of about 3.7 years similar to the “flip-flop” phenomenon known in starspot activity. The fact that the Sun shows the same pattern of magnetic activity as highly active stars strengthens the solar paradigm for magnetic activity on cool stars.
- Type
- Part 3: The Sun as a Prototype and Laboratory for Stellar Physics
- Information
- Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 128 - 132
- Copyright
- Copyright © Astronomical Society of the Pacific 2004