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One dimensional aperture synthesis observations at 2.8 cm of the brightness distribution over the solar equator

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Abstract

The brightness distribution of the equatorial region of the Sun has been investigated at 2.8 cm with an east-west resolution of 16.1″, for the following days: 30 June, 1 July, 3 July and 4 July, 1972. The results confirm the existence of very intense cores inside active regions with typical sizes of the order of 10–30″ and brightness temperatures in the range of 105 K, with possible peaks up to 6 × 106 K. The relationship of these features to the Hα structure is also discussed.

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Authors and Affiliations

  1. Osservatorio Astrofisico di Arcetri, Florence, Italy

    Ambretta Donati Falchi, Marcello Felli & Gianni Tofani

Authors
  1. Ambretta Donati Falchi
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  2. Marcello Felli
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  3. Gianni Tofani
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Falchi, A.D., Felli, M. & Tofani, G. One dimensional aperture synthesis observations at 2.8 cm of the brightness distribution over the solar equator. Sol Phys 48, 59–76 (1976). https://doi.org/10.1007/BF00153331

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  • DOI: https://doi.org/10.1007/BF00153331

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