A rare centimetric spike event on 10 March 2002 |
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| Authors: | M Wang R X Xie R A Sych Y H Yan and Y Y Liu |
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| Institution: | (1) National Astronomical Observatories, Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, China;(2) Institute of Solar-Terrestrial Physics, 126 Lermontov Street, 664033 Irkutsk, Russia;(3) National Astronomical Observatories, Chinese Academy of Sciences, 100012 Beijing, China |
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| Abstract: | A group of centimetric spikes was detected during the burst of 10 March 2002 with the spectrometer of NAOC (National Astronomical Observatories of China). These centimetric spikes are resolved clearly in the time and frequency panels. A statistical analysis shows that these spikes have very short durations (5–10 ms), narrow bandwidths (20–40 MHz), very high polarization degrees (≥90%), and relatively weak flux densities (10–40 sfu). The simultaneous 2D image observations of NoRH (Nobeyama Radioheliograph) and SSRT (Siberian Solar Radio Telescope) imply that the spikes should come from a small source region, which was located in an area with a complex magnetic field. It is also found that the spikes are polarized in the X-mode. These observations suggest that the electron cyclotron maser (ECM) is the most likely mechanism of these centimetric spikes. |
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