4–5 Jun 2015
IASB-BIRA (RMI Royal Meteorologic Institute meeting room)
UTC timezone

Narrow-band bursts of coronal radio emission at 2-3 solar radii and their possible generation mechanisms

4 Jun 2015, 12:35
25m
RMI meeting room (IASB-BIRA (RMI Royal Meteorologic Institute meeting room))

RMI meeting room

IASB-BIRA (RMI Royal Meteorologic Institute meeting room)

3 av. circulaire B-1180 Brussels
Talk Session 1

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)

Presentation materials

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