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| Content Provider | Springer Nature Link |
|---|---|
| Author | Ning, Zongjun Wu, H. Xu, F. Meng, X. |
| Copyright Year | 2008 |
| Abstract | We analyze a special kind of temporal fine structure in microwave radio emission for the 25 August 1999 solar flare observed by the PMO spectrometer over the range of 4.5 – 7.5 GHz. This flare displays continuum emission after a group of reverse-slope type III bursts around 6 GHz. High-resolution dynamic spectra reveal three evolving emission lines (EELs) following the type III group. They are characterized by isolated, narrow, and continuous emission strips, which display frequency fluctuations with time. Their frequency-drift rates are between −2 and 3 GHz s$^{−1}$. Distinct from the EELs at lower frequencies, three EELs have a very short duration of a few seconds. They show an average bandwidth of Δf≈330 MHz and a relative bandwidth of Δf/f≈0.057. This is the first time that this kind of fine structure has been observed around 6 GHz. |
| Starting Page | 107 |
| Ending Page | 113 |
| Page Count | 7 |
| File Format | |
| ISSN | 00380938 |
| Journal | Solar Physics |
| Volume Number | 250 |
| Issue Number | 1 |
| e-ISSN | 1573093X |
| Language | English |
| Publisher | Springer Netherlands |
| Publisher Date | 2008-06-13 |
| Publisher Place | Dordrecht |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Flares Radio radiation Extraterrestrial Physics, Space Sciences Meteorology/Climatology Astrophysics |
| Content Type | Text |
| Resource Type | Article |
| Subject | Astronomy and Astrophysics Space and Planetary Science |
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