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Microwave Emission from a Sunspot III. Implications for the Force Balance in a Static Sunspot

Published online by Cambridge University Press:  12 April 2016

Jeongwoo W. Lee ,
Dale E. Gary ,
G.J. Hurford  and
H. Zirin
Jeongwoo W. Lee
Affiliation:
Solar Astronomy 264-33, California Institute of Technology Pasadena, CA 91125, U.S.A.
Dale E. Gary
Affiliation:
Solar Astronomy 264-33, California Institute of Technology Pasadena, CA 91125, U.S.A.
G.J. Hurford
Affiliation:
Solar Astronomy 264-33, California Institute of Technology Pasadena, CA 91125, U.S.A.
H. Zirin
Affiliation:
Solar Astronomy 264-33, California Institute of Technology Pasadena, CA 91125, U.S.A.

Abstract

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We present our earlier measurement of the coronal fields above a sunspot in the active region, NOAA #4741, which was obtained using microwave spectroscopy from the Owens Valley Radio Observatory (OVRO) in a form that allows comparison with theoretical models. Our empirical results for the coronal fields are compared with several theoretical models in order to understand the magnetic structure of a static sunspot. It is found that the presence of transverse pressure gradients should be considered to get a satisfactory fit.

Type
Session 5. Fields in the Chromosphere and Corona
Information
International Astronomical Union Colloquium , Volume 141: The Magnetic and Velocity Fields of Solar Active Regions , 1993 , pp. 287 - 290
Copyright
Copyright © Astronomical Society of the Pacific 1993

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