Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-01-20
Astrophys.J. 605 (2004) 948-959
Astronomy and Astrophysics
Astrophysics
43 pages; 5 tables; 15 figures (9 color). ApJ (Part I : accepted)
Scientific paper
10.1086/382582
Continuum observations of a solar noise storm in the frequency range of 50 - 80 MHz observed with the Gauribidanur radio spectrograph during 2000 September, 26 & 27, are presented here. The radio spectral index of the noise storm continuum in the band 50 - 80 MHz is found to be ~3.65 during the above period. The Noise Storm continuum radiation is explained as a consequence of the non-thermal, plasma emission mechanism. The beam-density of suprathermal electrons is estimated for the coronal plasma near the source region of storm radiation. Supplementary evidence for the density-estimate is provided by way of analysing the imaging data from the SXT on-board the Yohkoh spacecraft, and the LASCO, MDI, and EIT on board the SoHO spacecraft.
Shanmugha Sundaram G. A.
Subramanian K. R.
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