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An Attempt to Associate Observed Photospheric Motions with the Magnetic Field Structure and Flare Occurrence in an Active Region

Published online by Cambridge University Press:  14 August 2015

M. J. Martres ,
I. Soru-Escaut  and
J. Rayrole
M. J. Martres
Affiliation:
Observatoire de Paris-Meudon, France
I. Soru-Escaut
Affiliation:
Observatoire de Paris-Meudon, France
J. Rayrole
Affiliation:
Observatoire de Paris-Meudon, France

Abstract

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We have tried to find empirical evidence for the role of photospheric motions in the building up of the flare productive magnetic patterns in Active Regions.

The bright Hα faculae are associated with V∥ structures different from a classical Evershed flow and particularly ‘anomalous’ in the regions and periods of high flare occurrence. The flares observed occurred at ‘crossings’ of the lines V∥ = 0(V ≠ 0) and H∥ = 0 and at places where V∥ = 0 showed abrupt changes of direction. It is suggested that these anomalous V∥ structures are evidence of vortex motions.

Type
Part IV: Observations of Magnetic Fields Associated with Flares and Other Transitory Phenomena
Information
Symposium - International Astronomical Union , Volume 43: Solar Magnetic Fields , 1971 , pp. 435 - 442
Copyright
Copyright © Reidel 1971 

References

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