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850 μm Observations of the 11 July 1991 Total Solar Eclipse

Published online by Cambridge University Press:  03 August 2017

M. W. Ewell ,
H. Zirin ,
J. B. Jensen  and
T. S. Bastian
M. W. Ewell
Affiliation:
Big Bear Solar Observatory, Caltech 264-33, Pasadena, CA 91125, U. S. A.
H. Zirin
Affiliation:
Big Bear Solar Observatory, Caltech 264-33, Pasadena, CA 91125, U. S. A.
J. B. Jensen
Affiliation:
Big Bear Solar Observatory, Caltech 264-33, Pasadena, CA 91125, U. S. A.
T. S. Bastian
Affiliation:
National Radio Astronomy Observatory, P. O. Box O, Socorro, NM 87801, U. S. A.

Abstract

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We present observations of the 11 July 1991 total solar eclipse made from the Caltech Submillimeter Observatory. The 850 μm limb is extended 3380±140 km above the visible limb, and there is a 10% brightening at the extreme limb. The measured limb height agrees with previous work at shorter and longer wavelengths. The run of limb heights with wavelength is well fit by a single electron density scale height. We argue that there is no need to invoke spicule geometry to explain the observations.

Keywords

eclipsesinfrared: starsSun: chromosphere
Type
Part 2: Infrared Observations of the 1991 Total Solar Eclipse
Information
Symposium - International Astronomical Union , Volume 154: Infrared Solar Physics , 1994 , pp. 161 - 166
Copyright
Copyright © Kluwer 1994 

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