Comparative Analysis Of Solar Observations To A Strong Absorption On Background Of Sporadic Radio Emission From The Sun

Details Comparative Analysis Of Solar Observations To A Strong Absorption On Background Of Sporadic Radio Emission From The Sun Comparative Analysis Of Solar Observations To A Strong Absorption On Background Of Sporadic Radio Emission From The Sun

Aug 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd..12e..23k&link_type=abstract

Long Wavelength Astrophysics, 26th meeting of the IAU, Joint Discussion 12, 21 August 2006, Prague, Czech Republic, JD12, #23

Astronomy and Astrophysics

Astrophysics

Scientific paper

Although the most of solar radio bursts shows their worth in emission received by space-based and ground-based radio astronomical instruments, some solar bursts demonstrate absorption features. These are fairly rare phenomena. Hitherto the detection of such events was most unreliable, and therefore their experimental properties are known not much. We present the results of radio telescope UTR-2 observations that show a strong absorption on background of a solar Type II radio burst in the 10-30 MHz frequency range. This event occurred August 19, 2003 about 11:20 UT. Simultaneously, a part of the solar Type II radio burst has been recorded by means of WIND spacecraft from 13.8 to 1 MHz. We also have found the same event with an absorption peculiarity on the Nançay Decameter Array (20-70 MHz) data. The strongest effect has been registered for the UTR-2 telescope due to its high sensitivity. The capabilities of this instrument permitted us to discern the quiet-Sun emission, the Galactic background radiation and sporadic features of the solar activity. Their selection lets to examine some theoretical conceptions for describing the solar phenomenon.

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