Quasi-periodic short-term modulations during a moving type IV burst

Details Quasi-periodic short-term modulations during a moving type IV burst Quasi-periodic short-term modulations during a moving type IV burst

Jan 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....93..129t&link_type=abstract

Astronomy and Astrophysics, vol. 93, no. 1-2, Jan. 1981, p. 129-135.

Astronomy and Astrophysics

Astronomy

45

Radio Sources (Astronomy), Solar Oscillations, Solar Radio Emission, Type 4 Bursts, Polarization Characteristics, Pulsed Radiation, Solar Corona, Synchrotron Radiation

Scientific paper

The Nancay Radioheliograph and the E.T.H. spectrometer measurements of a pulsating emission at the start of a moving type IV continuum indicated that the modulation is not strictly periodic and that the brightness temperature of the pulsating source is greater than 10 to the 9th K. The source shows two types of motions observed by the heliograph which correspond to two negative frequency drifts visible on the spectrometer: the first is a global motion with a velocity of 350 km/s typical of moving type IV, and the second has a much higher velocity of 100,000 km/s. Analysis of modulation and emission processes involving perturbations of the loss cone distribution of trapped electrons demonstrate that they provide an alternative for the interpretation of the observed characteristics.

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