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The Importance of Spatial Information in Sunspot Records

Published online by Cambridge University Press:  30 March 2016

John M. Brooke ,
Jaan Pelt ,
Pentti Pulkkinen  and
Ilka Tuominen
John M. Brooke
Affiliation:
MRCCS, Manchester Computing, University of Manchester, Oxford Road, Manchester, MIS 9PL, United Kingdom
Jaan Pelt
Affiliation:
Tartu Observatory, Tõravere, 61602, Estonia
Pentti Pulkkinen
Affiliation:
Academy of Finland, P.O. Box 99, 00501 Helsinki, Finland
Ilka Tuominen
Affiliation:
Astronomy Division, University of Oulu, P.O. Box 333, 90571 Oulu, Finland

Abstract

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We show that the spatial information in historical sunspot records, in particular the latitude of the spots, can be of great importance in determining the long term behaviour of the solar magnetic cycle. We examine a continuous record of sunspots with full spatial data from 1853-1996 compiled from the records of Carrington, Spörer, the GPR and SOON. Analysis of the latitudinally-weighted observations indicates that there is a previously unremarked oscillation of the solar magnetic equator with a period of approximately 90 years.

Type
II. Joint Discussions
Information
Highlights of Astronomy , Volume 12: Highlights of Astronomy. As presented at the XXIVth General Assembly of the IAU, 2000 , 2002 , pp. 334 - 337
Copyright
Copyright © Astronomical Society of Pacific 2002

References

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