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Outline
Since the start of routine observations in November 2022, the Chashan Broadband Solar radio spectrometer at Meter wavelengths (CBSm) of the Chinese Meridian Project Phase II has accumulated nearly one thousand meter-wave solar radio burst events. With its high time and frequency resolution, we carry out statistical and case studies of different burst types, and obtain a series of new findings. Type I bursts show power-law distributions in duration, bandwidth, and peak intensity. Among the Type II bursts observed, more than 60% exhibit band splitting, about 50% of the band-splitting events show asymmetric morphologies between the two branches, and about 40% of Type II bursts are associated with small flares or jets. Statistics of spike–Type III burst pairs reveal systematic polarization differences and time-frequency offsets between the two types of bursts. For Type IV bursts, a large number of reverse-drifting pulsations and a new fine spectral structure, beaded stripes combining the double periodicity of stripes and beads, are identified. These findings provide new observational constraints on coherent radio emission mechanisms and on the diagnosis of coronal magnetic field and density structures.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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