Statistical Analysis of Langmuir Waves Associated with Type III Radio Bursts: I. Wind Observations

Baltic astronomy

article

S. Vidojević¹  A. Zaslavsky¹  M. Maksimović¹  M. Dražić²  O. Atanacković² 

[1] LESIA – Observatoire de Paris, CNRS, UPMC, Universit´e Paris 06, Universit´e Paris-Diderot;Faculty of Mathematics, University of Belgrade

关键词: Sun wind;    flares;    radio radiation;    Langmuir waves;   

DOI  :  10.1515/astro-2017-0343

来源: Institute of Theoretical Physics and Astronomy

【 摘 要 】

Interplanetary electron beams are unstable in the solar wind and they generate Langmuir waves at the local plasma frequency or its harmonic. Radio observations of the waves in the range 4-256 kHz, observed in 1994-2010 with the WAVES experiment onboard the WIND spacecraft, are statistically analyzed. A subset of 36 events with Langmuir waves and type III bursts occurring at the same time was selected. After removal of the background, the remaining power spectral density is modeled by the Pearson system of probability distributions (types I, IV and VI). The Stochastic Growth Theory (SGT) predicts log-normal distribution for the power spectrum density of the Langmuir waves. Our results indicate that SGT possibly requires further verification.

【 授权许可】

Unknown