Periodicities in solar type III burst groups and source characteristics

Details Periodicities in solar type III burst groups and source characteristics Periodicities in solar type III burst groups and source characteristics

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...241..183z&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 241, no. 1, Jan. 1991, p. 183-186. Research supported by Observatoire de Paris

Astronomy and Astrophysics

Astrophysics

20

Periodic Variations, Solar Cycles, Solar Flux, Type 3 Bursts, Circular Polarization, Frequency Distribution, Radiation Measurement, Solar Activity, Temporal Resolution

Scientific paper

Periodicities have been searched for a large sample of type III groups (58) observed with high time resolution and at five discrete frequencies. The presence of periodicities between 1 to 6 s in a large number of detected type III groups is confirmed. Many groups exhibit more than one periodicity with a confidence level greater than 90 percent. The type III groups can be separated in two distinct classes, one which is weakly polarized and exhibits periodicities in the whole observed range, the other which is strongly polarized, with small geometrical size and only short periodicities (not greater than about 2 s).

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