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Statistical Study of Two Years of Solar Flare Radio Spectra Obtained with the Owens Valley Solar Array

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Nita, Gelu M., Gary, Dale E., and Lee, Jeongwoo

Editorial: The University of Chicago Press, THE ASTROPHYSICAL JOURNAL, 605, p.528–545, 2004.


We present results of analysis of 412 flares during 20012002 as detected by the Owens Valley Solar Array (OVSA). This is an in-depth study to investigate some results suggested by a previous study of solar bursts (Nita et al. 2002), which was limited to the peak time of the bursts at a few frequency bands. The new study includes the temporal dependence, at 4 s time resolution, of parameters measured at 40 frequencies in the range 118 GHz. We investigate distributions of burst parameters such as maximum flux density in the spectra, peak frequency, spectral slopes below and above the peak frequency (optically thick and thin slopes, respectively), and burst durations. We classify the microwave bursts according to their spectral properties and provide tables of averaged spectral parameters for each spectral type and for different frequency and intensity ranges.

Cuvinte cheie: solar radio bursts