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Subsun-eclipse-before-proof.pdf
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Final Accepted Manuscript
Affiliation
Univ Arizona, Steward ObservUniv Arizona, Dept Astron
Issue Date
2020-07-20
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OPTICAL SOC AMERCitation
Gunther P. Können, Glenn Schneider, Evan H. Zucker, and Panu Lahtinen, "Subsuns and rainbows during solar eclipses," Appl. Opt. 59, F1-F10 (2020)Journal
APPLIED OPTICSRights
Copyright © 2020 Optical Society of America.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
A photographic observation sequence was obtained of a subsun before, during, and after the total phase of the 2016 solar eclipse. The time-resolved images were obtained from a high-altitude jet aircraft. The image sequence was searched for the possible presence of a solar corona-generated subsun during totality. Although the subsun-creating conditions apparently persisted during totality, the drop in signal intensity compared to the local background prevented its detection. Separately, we document a visual observation from the 1977 total solar eclipse of a rainbow that faded, in the last a few seconds before totality, from being normally multicolored to monochromatic red from water drops then predominantly illuminated by light from the solar chromosphere. A similar transition in the final seconds before, and after, totality is expected to occur for parhelia. The posited short-living monochromatic red parhelion resulting from the momentary illumination of ice crystals by the solar chromosphere is still waiting to be observed. (C) 2020 Optical Society of AmericaNote
12 month embargo; published 29 May 2020ISSN
1559-128XEISSN
1539-4522PubMed ID
32749273Version
Final accepted manuscriptae974a485f413a2113503eed53cd6c53
10.1364/AO.387716