Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.0808m&link_type=abstract
American Astronomical Society, SPD meeting #37, #8.08; Bulletin of the American Astronomical Society, Vol. 38, p.231
Astronomy and Astrophysics
Astronomy
Scientific paper
One of the most important sources of information about processes in solar corona is solar radio emission. Bursts with fine spectral and temporal structure (subsecond pulses or SSP) present the shortest energetic solar events, and they are directly associated with energy release processes on small temporal and spatial scales.The dependence of subsecond pulse spectral width on source location on the solar disk has been investigated. The goal is to study spectral band spreading due to wave scattering on the path in the low corona. The data with high spatial, spectral and temporal resolution obtained with the Siberian Solar Radio telescope (frequency about 5.7 GHz, spatial resolution until 15 arc sec, time resolution 14 ms) were used. The data of the spectropolarimeters (5.2-7.6 GHz, 6 ms) of the National Astronomical Observatories overlap with SSRT observation time including the SSRT working bandwidth. Working with a large dataset of observational material we researched relation between spectral width of bursts similar to type III-like and their position on the Sun. This study opens new possibilities for diagnostics of plasma turbulence parameters in the corona and it permits one to identify the generation mechanism of emission.
Altyntsev Alexander T.
Meshalkina Natalia S.
Yan Yiguang
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