Polarization of drifting pairs at decameter waves

Details Polarization of drifting pairs at decameter waves Polarization of drifting pairs at decameter waves

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..12e..37b&link_type=abstract

Long Wavelength Astrophysics, 26th meeting of the IAU, Joint Discussion 12, 21 August 2006, Prague, Czech Republic, JD12, #37

Astronomy and Astrophysics

Astrophysics

Scientific paper

The results of polarization researches of drifting pairs (DP) observed during Type III bursts storm in July[S:,:S][Author ID2: at Fri Jul 14 10:33:00 2006 ] 11-21, 2002 with radio telescope URAN-2 are presented. The array of the radio telescope consists of 512 broadband cross dipoles, that enables to receive signals of two polarizations, has the area about of 28000 m^2 and works in 9-30 MHz range. Circular polarization measurements were made at frequency 24.75 MHz in frequency band 10 μHz with time resolution 10 ms. Some hundreds bursts, both forward and reverse DPs, which have been registered with radio telescope UTR-2 in the frequency range 18-32 μHz, were analyzed. For the first time we find that DP polarizations strongly depend on the location of the active area associated with these bursts. When an active area is near to the central meridian, polarizations of both DP components have the same signs and their values are up to 30%. In other days in most cases polarizations of both components have opposite signs and only for some bursts polarization reaches 10%. In all cases both DP components have comparable polarization degrees.

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