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Observational characteristics of weak polarized microwave spikes

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Abstract

Eleven microwave spike events observed with the 2.6–3.8 GHz spectrometer of Beijing Astronomical Observatory (BAO) are analysed. The polarization degrees of spikes are variable, some spikes have frequency drift with the drift rate of several GHz s−1. In particular, the time delay (8 ms) between the two polarization modes of spike is detected, which is different from previous results. According to the leading spot rule, we conclude that the o-modes arrive first. Moreover, the reversal of polarization sense versus frequency is also found. A change of the emission mode may be the cause of the polarization reversal.

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Authors and Affiliations

  1. Beijing Astronomical Observatory, Chinese Academy of Sciences, Beijing, 100012, China

    M. Wang, Q.J. Fu & R.X. Xie

  2. Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, 210008, China

    G.L. Huang

Authors
  1. M. Wang
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  2. Q.J. Fu
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  3. R.X. Xie
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  4. G.L. Huang
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Wang, M., Fu, Q., Xie, R. et al. Observational characteristics of weak polarized microwave spikes. Solar Physics 189, 331–344 (1999). https://doi.org/10.1023/A:1005213701438

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