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First solar butterfly diagram from Schwabe's observations in 1825–1867

Published online by Cambridge University Press:  26 August 2011

Rainer Arlt  and
Anastasia Abdolvand
Rainer Arlt
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany email: [email protected]
Anastasia Abdolvand
Affiliation:
Lycée Français de Berlin Berlin, Germany email: [email protected]
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Abstract

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The original sunspot observations by Samuel Heinrich Schwabe of 1825–1867 were digitized and a first subset of spots was measured. In this initial project, we determined more than 14 000 sunspot positions and areas comprising about 11% of the total amount of spots available from that period. The resulting butterfly diagram has a typical appearance, but with evident north-south asymmetries.

Keywords

Sun: activitysunspotshistory and philosophy of astronomy
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S273: The Physics of Sun and Star Spots , August 2010 , pp. 286 - 289
Copyright
Copyright © International Astronomical Union 2011

References

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