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Coronal loops and their modeling

Published online by Cambridge University Press:  25 May 2016

G.H.J. Van Den Oord  and
F. Zuccarello
G.H.J. Van Den Oord
Affiliation:
Sterrekundig Instituut Utrecht P.O. Box 80.000, 3508 TA Utrecht, The Netherlands
F. Zuccarello
Affiliation:
Istituto di Astronomia dell'Università, Città Universitaria, Viale A. Doria, I-95125 Catania, Italy

Abstract

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We discuss the theory of quasi-static coronal loops, introducing a phase plane representation to study loop solutions independently of specific boundary conditions. Emphasis is put on the effects of loop expansion, heat input and gravitational stratification on the differential emission measure, and on the intrinsic limitations of spectroscopic observations for deriving loop parameters. We show that certain classes of published loop solutions cannot actually exist. For expanding loops new classes of loop solutions, with rather special properties, are presented. Special attention is paid to loops in binary systems and on rapidly rotating stars.

Type
Session IV: “Outer Atmospheric Structure”
Information
Symposium - International Astronomical Union , Volume 176: Stellar Surface Structure , 1996 , pp. 433 - 448
Copyright
Copyright © Kluwer 1996 

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