Coronal bright points at 6 cm wavelength |
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| Authors: | Q Fu M R Kundu E J Schmahl |
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| Institution: | (1) Astronomy Program, University of Mayland, 20742 College Park, MD, U.S.A. |
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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.On leave from Beijing Observatory, Beijing, Peoples Republic of China. |
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