Volume 429, Number 3, January III 2005
|Page(s)||1093 - 1096|
|Published online||05 January 2005|
Century-scale persistence in longitude distribution in the Sun and in silico
Tartu Observatory, 61602 Tõravere, Estonia e-mail: email@example.com
2 Astronomy Division, Department of Physical Sciences, PO Box 3000, 90014 University of Oulu, Finland
3 Manchester Computing, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
4 Department of Mathematics, University of Manchester, Oxford Road, Manchester, M13 9PL, UK
Accepted: 22 October 2004
Using Greenwich sunspot data for 120 years it was recently observed that activity regions on the Sun's surface tend to lie along smoothly changing longitude strips 180° apart from each other. However, numerical experiments with random input data show that most, if not all, of the observed longitude discrimination can be an artifact of the analysis method.
Key words: Sun: activity / Sun: magnetic fields / Sun: sunspots / methods: statistical
© ESO, 2005
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