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On the origin of microwave type U-bursts
2003
Astronomy and Astrophysics
An analysis is made of the observations of U-type cm-bursts recorded simultaneously with high spatial (Siberian solar radio telescope) and spectral resolution (National Astronomical Observatories/Beijing spectropolarimeters). It is shown that the source positions of increasing and decreasing branches of the U-burst coincide within a few arcsec. The suggestion is made that the occurrence of the observed type U-bursts at microwave frequencies is associated with a pressure and density response to rapid heating pulses in flare loops.
doi:10.1051/0004-6361:20031273
fatcat:ejgzrqeybfgtljnkoi54gzq6cq