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Radio Physics and Radio Astronomy

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ISSN Druckformat: 2152-274X

ISSN Online: 2152-2758

PECULIARITY OF CONTINUUM EMISSION FROM THE UPPER SOLAR CORONA AT DECAMETER WAVELENGTHS

Volumen 3, Ausgabe 3, 2012, pp. 187-196
DOI: 10.1615/RadioPhysicsRadioAstronomy.v3.i3.10
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ABSTRAKT

The results of the quiet Sun radio emission investigated at decameter wavelengths are presented. The observations have been made with the URAN-2 antenna array in summer seasons of 2008-2009 at 20 and 25 MHz within 250 kHz bandwidth together with the UTR-2 radio telescope in the summer-autumn period of 2010 at 16.5 to 33.0 MHz in the mode of one-dimensional heliograph. The average values of the quiet Sun corona flux density according to URAN-2 measurements are equal to 860 Jy at 25 MHz and 710 Jy at 20 MHz. The values of integral flux density from UTR-2 measurements for these frequencies are 950 and 800 Jy, respectively. The URAN-2 and UTR-2 measured data as respects the spectral index within 16.5−200 MHz have shown it to be the same and equal to −2.1 ± 0.1. The angular sizes of solar corona equatorial diameter have been determined from the UTR-2 observations. The results yielded are in good agreement with the values known for the continuum emission from the solar corona at higher frequencies. Simultaneous application of different geographically spaced radiotelescopes possessing coincident frequency range is shown effective, too.

REFERENZIERT VON
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  2. Melnik V. N., Shepelev V. A., Poedts S., Dorovskyy V. V., Brazhenko A. I., Rucker H. O., Interferometric Observations of the Quiet Sun at 20 and 25 MHz in May 2014, Solar Physics, 293, 6, 2018. Crossref

  3. Melnik V. N, Konovalenko A. A., Dorovskyy V. V., Lecacheux A., Rucker H. O., Shevchuk M. V., EXPLORATION OF THE SOLAR DECAMETER RADIO EMISSION WITH THE UTR-2 RADIO TELESCOPE, Radio physics and radio astronomy, 26, 1, 2021. Crossref

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