| Issue |
A&A
Volume 400, Number 2, March III 2003
|
|
|---|---|---|
| Page(s) | 753 - 758 | |
| Section | The Sun | |
| DOI | https://doi.org/10.1051/0004-6361:20030019 | |
| Published online | 03 March 2003 | |
Metric observations of transient, quasi-periodic radio emission from the solar corona in association with a “halo” CME and an “EIT wave” event
1
Centre for Research and Education in Science and Technology, Hosakote 562 114, India
2
Indian Institute of Astrophysics, Bangalore 560 034, India
Corresponding author: R. Ramesh, ramesh@iiap.ernet.in
Received:
6
May
2002
Accepted:
7
January
2003
We present metric radio observations of quasi-periodic emission
from the solar corona
in close association with a “halo” CME and an “EIT wave” phenomenon.
The radio event lasted for about 60 s. Its
mean periodicity was ≈8.8 s.
The estimated Alfvén speed in the corona
was 
. The derived height of the source region of the
observed quasi-periodic emission, and the magnetic field at the corresponding
location (for emission in the fundamental mode)
were ~
and 6.3 G, respectively. The magnetic field for harmonic emission
was found to be ~3.1 G.
Key words: sun: activity / sun: corona / sun: oscillations / plasmas / magnetohydrodynamics (MHD) / sun: radio radiation
© ESO, 2003
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