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A Model Flare and the Continued Post-Flare Mass Release from the Flare Region

Published online by Cambridge University Press:  14 August 2015

Yutaka Uchida
Yutaka Uchida*
Affiliation:
Tokyo Astronomical Observatory, University of Tokyo Mitaka, Tokyo 181, Japan

Abstract

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A mechanism for slow and enduring mass release well after the flare onset, which is inferred from the enduring enhancement in the interplanetary mass flux after flare activity, is discussed in the modified scheme of a “neutral sheet” model of flares. According to a possible new way of looking at the neutral sheet model as proposed by Uchida and Sakurai, it is argued that a slow and enduring mass release in the later phase of a flare may come from the reconnection in the region of interleaved opposite polarity fields produced in the interchange collapse which is proposed to be responsible for the highly dynamical phase at the start of a flare. Heated plasma, which is magnetically disconnected form the anchoring field in the photosphere through reconnection in this interleaved region, is continuously produced during the thermal phase, and is expelled from the flare region by the “buoyancy” in the gradient of the surrounding high magnetic pressure. The trajectory of this mass leakage will be along the steepest gradient of magnetic pressure, rather than along the field lines as expected in other picture, and this process can supply mass to the solar wind in open field regions.

Type
Part IV. Solar Transient Phenomena Affecting the Corona and Interplanetary Medium: - Theoretical Considerations
Information
Symposium - International Astronomical Union , Volume 91: Solar and Interplanetary Dynamics , 1980 , pp. 303 - 306
Copyright
Copyright © Reidel 1980 

References

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