Influence of random refraction of radio waves in the corona on properties of solar noise storms

Heading: 
Yurovsky, YF
Kinemat. fiz. nebesnyh tel (Online) 2007, 23(5):266-272
https://doi.org/10.3103/s0884591307050029
Language: Russian
Abstract: 

Scattering of radio waves by irregularities in the coronal electron density is inevitably accompanied by occurrence of scattered signal intensity variations. According to the probability theory, an exponential law describes the distribution of scattered signal intensity. An exponential law satisfactorily fits the empirical distribution of intensity of the majority of the observed noise storms as well. The listed facts favour the hypothesis of the noise storm burst component formation as a result of scattering of radio radiation of a quasi stable dot source by coronal irregularities.

Keywords: refraction of radio waves, solar noise storm
References: 
  1. Levin, B.R., Teoriya sluchainykh protsessov i ee primenenie v radiotekhnike (The Theory of Random Processes and Its Application in Radio Engineering), Moscow: Sov. Radio, 1960.
  2. Yurovskii, Yu.F., Determining the Duration of Solar Noise Storm Bursts from Their Power Spectra, Izv. Krym. Astrofiz. Observ., 2003, vol. 99, pp. 92–100.
  3. Elgaroy, Q., Solar Noise Storms, Pergamon Press, 1977.
  4. Fokker, A.D., Coronal Scattering of Radiation from Solar Radio Sources, Bull. Astron. Inst. Netherlands, 1965, vol. 1, no. 2, pp. 111–124.
  5. Mercier, C. and Trottet, G., Coronal Radio Bursts: A Signature of Nanoflares?, Astrophys. J., 1997, vol. 474, no. 1, pp. L65–L68.

  6. Shanmugha Sundaram, G.A. and Subramanian, K.P., Quasi-Periodicity in Global Solar Radio Flux at Metric Wavelengths During Noise Storm, Solar Phys., 2004, vol. 222, pp. 311–322.
  7. Steinberg, J.L., Auber-Giraud, M., Leblanc, Y., and Boischot, A., Coronal Scattering, Absorption and Refraction of Solar Radioburst, Astron. and Astrophys., 1971, vol. 10, no. 3, pp. 362–376.