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1 results

  • Where are sunspots generated?

  • Evgeny V. Ivanov
  • Journal:
    Proceedings of the International Astronomical Union / Volume 2004 / Issue IAUS223 / June 2004
    Published online by Cambridge University Press:
    14 March 2005, pp. 261-262
    Print publication:
    June 2004
    • Article
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  • The data from the Greenwich Observatory for 1879–2003 (cycles 12–23) have been used to plot a time (Carrington rotations) vs. Carrington longitude diagram of distribution of the rotation–summed daily areas for each sunspot group. It has been revealed that most of the sunspots appear as clusters having common sources (Sunspot Formation Zones) that lie on a surface rotating with a period close to the Carrington rotation period $T=27.2753$ days. At the same time both the active longitudes and medium-size spots shift in the Carrington heliolongitude and rotate at an angular velocity corresponding to the rotation period $T\sim26.8-26.9$ days. An attempt is made to explain contradictory data on the character of rotation of sunspots and active longitudes.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html