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Coronal bright points at 6 cm wavelength

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Abstract

We report the results of the first observations of solar coronal bright points at 6 cm wavelength using the Very Large Array (VLA), with a spatial resolution of ∼ 1″.2. The maximum brightness temperature of the sources observed is ≈ 3 × 104 K with a mean value of ≈ 1 × 104 K (above the quiet Sun value). The lifetime of most sources is between 5 and 20 min. The average diameter of the sources is about 5–15″ arc. The sources are gaussian-like near the footpoint of miniature loops and they appear in groups. The observations indicate that significant fluctuations in the brightness temperature (sometimes quasi-periodic) and in the spatial extents of these sources can occur over periods of a few minutes.

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Authors and Affiliations

  1. Astronomy Program, University of Mayland, 20742, College Park, MD, U.S.A.

    Q. Fu, M. R. Kundu & E. J. Schmahl

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  1. Q. Fu
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  2. M. R. Kundu
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  3. E. J. Schmahl
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On leave from Beijing Observatory, Beijing, Peoples Republic of China.

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Fu, Q., Kundu, M.R. & Schmahl, E.J. Coronal bright points at 6 cm wavelength. Sol Phys 108, 99–111 (1987). https://doi.org/10.1007/BF00152080

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  • DOI: https://doi.org/10.1007/BF00152080

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