Abstract
view Abstract Citations (3) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Solar radio emission very near the plasma frequency Wentzel, D. G. Abstract The propagation of signals from the solar corona emitted very near the plasma frequency is investigated. The group velocity near the plasma frequency is analyzed; near the edge of the cone of emission, the bandwidth of the escaping radiation is much smaller than the inherent bandwidth of emission. Finite burst duration is observed because of the differential delays in the various parts of the signal, even when there is no subsequent coronal scattering. A formula for the burst duration when the density gradient and magnetic field are parallel is presented. For a homogeneous corona, the burst duration is 0.1 s longer than observed. The signal can be shortened by invoking a smaller density scale height near the plasma level or letting the direction of the density gradient lie outside the cone of emission. A coronal model to account for the observations is suggested. Publication: The Astrophysical Journal Pub Date: July 1983 DOI: 10.1086/161117 Bibcode: 1983ApJ...270..250W Keywords: Plasma Frequencies; Solar Corona; Solar Radio Emission; Intensity; Solar Magnetic Field; Solar Radio Bursts; Solar Physics full text sources ADS |
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