Coronal bright points at 6 cm wavelength

✍ Scribed by Q. Fu; M. R. Kundu; E. J. Schmahl

• Publisher: Springer
• Year: 1987
• Tongue: English
• Weight: 777 KB
• Volume: 108
• Category: Article
• ISSN: 0038-0938
• DOI: 10.1007/bf00152080

✦ Synopsis

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 x 104 K with a mean value of ~ 1 x 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.