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Determination of Prominence Plasma β from the Dynamics of Rising Plumes

Published online by Cambridge University Press:  06 January 2014

Andrew Hillier ,
Richard Hillier  and
Durgesh Tripathi
Andrew Hillier
Affiliation:
Kwasan Observatory, 17-1 Kitakazan-ohmine-cho, Yamashina-ku, Kyoto, 607-8471, Japan email: [email protected]
Richard Hillier
Affiliation:
Department of Aeronautics, Imperial College, London, United Kingdom
Durgesh Tripathi
Affiliation:
Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, India
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Abstract

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Observations of quiescent prominences show rising plumes, dark in chromospheric lines, that propagate from large bubbles. In this paper we present a method that may be used to determine the plasma β (ratio of gas pressure to magnetic pressure) from the rising plumes. Using the classic fluid dynamic solution for flow around a circular cylinder, the compression of the prominence material can be estimated. Application to a prominence gave an estimate of the plasma β as β=0.47−1.13 for a ratio of specific heats of γ=1.4−1.7.

Keywords

Sun: prominencesmagnetic fieldsMHDinstabilities
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S300: Nature of Prominences and their role in Space Weather , June 2013 , pp. 94 - 97
Copyright
Copyright © International Astronomical Union 2013 

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