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Observation of a coronal hole at 85 GHz

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Abstract

A coronal hole was observed at 85 GHz(3.5 mm-λ) on November 24, 1970, when a spectacular coronal hole was observed in soft X-rays by AS&E. The millimeter counterpart of the hole is much weaker and less widespread than in X-rays. The brightness temperature inside the hole was in most places about 100–200 K lower than the mean brightness temperature of the Sun at 85 GHz.

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Authors and Affiliations

  1. Astronomy Program, University of Maryland, 20742, College Park, Ma., U.S.A.

    M. R. Kundu & Sou-Yang Liu

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  1. M. R. Kundu
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  2. Sou-Yang Liu
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Kundu, M.R., Liu, SY. Observation of a coronal hole at 85 GHz. Sol Phys 49, 267–269 (1976). https://doi.org/10.1007/BF00162450

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  • DOI: https://doi.org/10.1007/BF00162450

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