Metric observations of transient, quasi-periodic radio emission from the solar corona in association with a “halo” CME and an “EIT wave” event
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, email@example.com
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