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Solar active region emergence and flare productivity

Published online by Cambridge University Press:  01 August 2006

Silvia C. Dalla ,
Lyndsay Fletcher  and
Nicholas A. Walton
Silvia C. Dalla
Affiliation:
School of Physics and Astronomy, University of Manchester, P.O. Box 88, Manchester M60 1QD, UK email: [email protected]
Lyndsay Fletcher
Affiliation:
Department of Physics and Astronomy, University of Glasgow, Kelvin Building, Glasgow G12 8QQ, UK email: [email protected]
Nicholas A. Walton
Affiliation:
Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK email: [email protected]
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Abstract

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We use the workflow capabilities of the AstroGrid Virtual Observatory system (<http://www.astrogrid.org>) to analyse the relation between flare productivity and location of Active Region (AR) emergence on the Sun. Specifically, we investigate whether emergence of a new region near existing ones results in increased productivity of the new and/or pre-existing AR. To address this question, we build a series of workflows that perform queries to catalogues of regions and flares, and operations on the results of the queries. There is a strong East-West asymmetry in the location of emergence of new regions. We do not find a significant difference between the flaring rate of paired and isolated regions, when we choose a value of 12° as the cutoff between the two populations.

Keywords

SunspotsSun: magnetic fieldsSun: flares
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Highlights of Astronomy 14: Highlights of Astronomy , August 2006 , pp. 614
Copyright
Copyright © International Astronomical Union 2007

References

Maunder, A. S. D. 1907, MNRAS, 67, 451CrossRefGoogle Scholar