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Infrared observations of supergranule temperature structure

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Abstract

One and two-dimensional observations were made at 1.64 μ, the deepest observable level in the solar atmosphere; at 1.72 μ, representing the chromosphere; and at 1.17 μ, representing the visible photosphere. Structures distributed on a supergranular size scale (30000 km) are apparently present at all levels. These structures in the deep photospheric level (1.64 μ) seem to be a 50K–500K temperature decrease over surrounding photosphere confined to the magnetic field elements with horizontal scales less than 4000 km at supergranular boundaries, rather than a general temperature structure over the entire supergranule cell appropriate to convective energy transport.

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Authors and Affiliations

  1. Kitt Peak National Observatory, 85726, Tucson, Ariz., U.S.A.

    Simon P. Worden

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  1. Simon P. Worden
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Currently at the Sacramento Peak Observatory, AFCRL, Sunspot, New Mexico 88349, U.S.A.

Operated by the Association of Universities for Research in Astronomy Inc. under contract with the National Science Foundation.

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Worden, S.P. Infrared observations of supergranule temperature structure. Sol Phys 45, 521–532 (1975). https://doi.org/10.1007/BF00158467

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  • DOI: https://doi.org/10.1007/BF00158467

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