Statistical Study of Two Years of Solar Flare Radio Spectra Obtained with the Owens Valley Solar Array
Open Access
- 10 April 2004
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 605 (1), 528-545
- https://doi.org/10.1086/382219
Abstract
We present results of analysis of 412 flares during 2001-2002 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 1-18 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.Keywords
This publication has 14 references indexed in Scilit:
- Decimetric Spike Bursts versus Microwave ContinuumThe Astrophysical Journal, 2003
- Hα, Extreme‐Ultraviolet, and Microwave Observations of the 2000 March 22 Solar Flare and Spontaneous Magnetic ReconnectionThe Astrophysical Journal, 2003
- RADIO EMISSION FROM SOLAR FLARESAnnual Review of Astronomy and Astrophysics, 1998
- Flat microwave spectra seen at X-class flaresSolar Physics, 1994
- Multifrequency observations of a solar microwave burst with two-dimensional spatial resolutionThe Astrophysical Journal, 1990
- Peak flux density spectra of large solar radio bursts and proton emission from flaresJournal of Geophysical Research, 1985
- A frequency-agile interferometer for solar microwave spectroscopySolar Physics, 1984
- Simplified expressions for the gyrosynchrotron radiation from mildly relativistic, nonthermal and thermal electronsThe Astrophysical Journal, 1982
- Spectral distributions of microwave burstsSolar Physics, 1975
- Solar Flares and Associated 2800 Mc/sec (10.7 Cm) Radiation.The Astrophysical Journal, 1954