Absorption in Burst Emission

Details Absorption in Burst Emission Absorption in Burst Emission

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007soph..245..345k&link_type=abstract

Solar Physics, Volume 245, Issue 2, pp.345-354

Physics

5

Sun: Corona, Sun: Shock Waves, Sun: Radio Radiation

Scientific paper

Here we report a radio burst in absorption at 9 30 MHz observed with the UTR-2 telescope. This event occurred on 19 August 2003 about 11:16 11:26 UT, against solar type IV/II emission background. It is the first event where absorption was observed below 30 MHz. The absorption region, comparable with the solar radius size, traveled a long distance into the upper corona from the Sun. We show that the burst minimum corresponds to the almost full absorption of the solar radio emission up to a background level of the quiescent Sun. This supports the interpretation of the phenomenon as an absorption. The result is examined independently with the Nançay Decameter Array measurements and the Wind WAVES instrument records.

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