Speaker
Dr
Yuriy Voitenko
(Belgian Institute for Space Aeronomy)
Description
UTR-2 (Kharkiv, Ukraine) and URAN-2 (Poltava, Ukraine) are world-largest radio telescopes at decametric wavelengths. High sensitivity and time resolution of these telescopes allowed revealing many new features of the coronal radio emission. We discuss narrow-band coronal radio bursts at 23-35 MHz with frequency drift rates ~ 110 kHz. These bursts appear between type III and type II bursts and imply intermediate velocities of the emission sources ~ 10^8 cm/s. We discuss such radio bursts and possible generation mechanisms for them. In particular, our results suggest that kinetic Alfven waves can be responsible for these bursts. Observations and analysis of these bursts provide a promising tool for studying coronal processes and remote coronal diagnostics.
Primary author
Dr
Yuriy Voitenko
(Belgian Institute for Space Aeronomy)
Co-authors
Prof.
Valentin Melnik
(Institute of Radio Astronomy of NASU, Kharkiv, Ukraine)
Viviane Pierrard
(Belgian Institute for Space Aeronomy)