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850 μm Observations of the 11 July 1991 Total Solar Eclipse

Ewell, M. W., Jr. and Zirin, H. and Jensen, J. B. and Bastian, T. S. (1994) 850 μm Observations of the 11 July 1991 Total Solar Eclipse. In: Infrared Solar Physics. IAU Symposium Proceedings Series. No.154. Kluwer , Dordrecht, pp. 161-166. ISBN 9780792325222.

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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.

Item Type:Book Section
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Bastian, T. S.0000-0002-0713-0604
Additional Information:© 1994 IAU. We would like to thank Prof. Tom Phillips for letting us point his telescope at the sun, Dr. Gordon Hurford for developing the Griffolyn tent, Ms. Michal Peri for help cutting it, Antony Schinckel for his high-altitude acrobatics, and Taco Machilvi for his computer wizardry. We would also like to thank Prof. E. Avrett for several conversations on chromospheric models. This work was supported by NSF grants AST-9015139, AST-9015755, and by a Caltech SURF.
Funding AgencyGrant Number
Caltech Summer Undergraduate Research Fellowship (SURF)UNSPECIFIED
Subject Keywords:eclipses - infrared: stars - Sim: chromosphere
Series Name:IAU Symposium Proceedings Series
Issue or Number:154
Record Number:CaltechAUTHORS:20181116-101920801
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Official Citation:Ewell, M., Zirin, H., Jensen, J., & Bastian, T. (1994). 850 μm Observations of the 11 July 1991 Total Solar Eclipse. Symposium - International Astronomical Union, 154, 161-166. doi:10.1017/S0074180900124386
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90958
Deposited By: Tony Diaz
Deposited On:16 Nov 2018 19:47
Last Modified:12 May 2020 21:54

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