6 centimeter observations of solar bursts with 0.1 S time constant and arcsec resolution

Abstract

view Abstract Citations (17) References (21) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS 6 centimeter observations of solar bursts with 0.1 S time constant and arcsec resolution Kattenberg, A. ; Allaart, M. Abstract The results are presented of the high time resolution (0.1 s) observations of solar microwave bursts with the Westerbork synthesis radio telescope. The 10 (rather weak) microwave bursts that are described here were observed at 6 cm wavelength during the Solar Maximum Year (1980) in the Flare Buildup Study (FBS) action periods. The bursts are very different in detailed appearance (e.g., their time evolution, their polarization structure, and the occurrence of strongly polarized spikes and spikes at different positions). There are, however, also interesting similarities. The bursts appear to have a bipolar nature, with the two sources having different characteristics. Often one of the sources is narrow (less than 10 arcsec), bright (Tb greater than 100-million K), and highly variable in time. The other source is broader (greater than 15 arcsec), fainter (Tb less than 50-million K), and it shows a more gradual evolution in time. The pattern can be understood as the result of flaring in an asymmetric coronal magnetic arc. Publication: The Astrophysical Journal Pub Date: February 1983 DOI: 10.1086/160697 Bibcode: 1983ApJ...265..535K Keywords: Centimeter Waves; Solar Radio Bursts; Brightness Distribution; H Alpha Line; High Resolution; Polarized Electromagnetic Radiation; Solar Flares; Temporal Distribution; Solar Physics full text sources ADS |