Observations of microwave subsecond pulses with high spectral and spatial resolution

Details Observations of microwave subsecond pulses with high spectral and spatial resolution Observations of microwave subsecond pulses with high spectral and spatial resolution

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.506..761s&link_type=abstract

In: Solar variability: from core to outer frontiers. The 10th European Solar Physics Meeting, 9 - 14 September 2002, Prague, Cze

Physics

Solar Flares: Microwave Pulses

Scientific paper

In this paper results of simultaneous observations of the microwave subsecond pulses with high temporal, spatial and spectral resolution - the Siberian Solar Radio Telescope, 5.7 GHz, resolution 14 ms and spectropolarimeter, 5.2-7.6 GHz, 5 ms of the National Astronomical Observatories are presented. Time profiles on the SSRT frequency essentially depend on SSP spectral peculiarities. The relation of the SSP location with their spectral and polarization features is considered. 17 September 2001 flare is discussed in detail. The SSP was observed in initial phase of the flare, its HWFH duration was 40 ms. During this pulse the dynamic spectrum was changing sinusoidally, with the spectrum width of about 1%, and polarization degree of 60%. The SSP was observed simultaneously by both NS (North-South) and EW (East-West) arms (in two interference orders in the last case). The angle between EW and NS was 46 degree. The site of the SSI sources in the burst structures was determined. Also, it was shown, that the source was not point-like, but its size about the beam width (18 arcsec) for NS scanning direction. In the EW direction the SSP size was less than 10 arcsec.

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