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Article Dans Une Revue The Astrophysical journal letters Année : 2010

On The Brightness and Waiting-Time Distributions of a Type III Radio Storm Observed By Stereo/Waves

Résumé

Type III solar radio storms, observed at frequencies below ~16 MHz by space-borne radio experiments, correspond to the quasi-continuous, bursty emission of electron beams onto open field lines above active regions. The mechanisms by which a storm can persist in some cases for more than a solar rotation whilst exhibiting considerable radio activity are poorly understood. To address this issue, the statistical properties of a type III storm observed by the STEREO/WAVES radio experiment are presented, examining both the brightness distribution and (for the first time) the waiting-time distribution (WTD). Single power-law behavior is observed in the number distribution as a function of brightness; the power-law index is ~2.1 and is largely independent of frequency. The WTD is found to be consistent with a piecewise-constant Poisson process. This indicates that during the storm individual type III bursts occur independently and suggests that the storm dynamics are consistent with avalanche-type behavior in the underlying active region.

Dates et versions

hal-03743033 , version 1 (02-08-2022)

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Citer

Jonathan P. Eastwood, Michael S. Wheatland, H. S. Hudson, Sam Krucker, Stuart D. Bale, et al.. On The Brightness and Waiting-Time Distributions of a Type III Radio Storm Observed By Stereo/Waves. The Astrophysical journal letters, 2010, 708, pp.L95-L99. ⟨10.1088/2041-8205/708/2/L95⟩. ⟨hal-03743033⟩
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