Solar Pulsating Bursts at Submillimeter Wavelengths

Details Solar Pulsating Bursts at Submillimeter Wavelengths Solar Pulsating Bursts at Submillimeter Wavelengths

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....5652k&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #5652

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Scientific paper

We report some characteristics of trains of pulses that are frequently observed in the Sun at 212 and 405 GHz by the Solar Submillimeter Telescope operated at El Leoncito Astronomical Complex, Argentina Andes. Pulses time scales range typically from 100-500 milliseconds. Although pulsed bursts are usually associated to optical flares or events at other energy ranges, there are various examples without connection to any important activity in the solar disk. In the submillimeter range of wavelength most pulsed bursts are detected without any bulk emission component. There is a significant association between the occurrence of submm-wave pulsed bursts and the launch times of coronal mass ejections (CMEs). Pulses bursts might turn out a reliable early signature of CME's, specially for those occurring near the center of the solar disk, which produce the most important geophysical effects. For solar event for which there are light curves measured at submm-waves or at higher energy ranges (X-, gamma-rays), there are qualitative indications that the time rate of pulse occurrence and pulses amplitudes are proportional to the energy release rate with time (fluxes). The submm-wave pulsed bursts might be representative of multiple energy releases in complex magnetic structures where many fast instabilities occur in small scale magnetic arcades or fluxules.

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