The velocity and the density spectrum of the solar wind from simultaneous three-frequency IPS observations

Details The velocity and the density spectrum of the solar wind from simultaneous three-frequency IPS observations The velocity and the density spectrum of the solar wind from simultaneous three-frequency IPS observations

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...123..191s&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 123, no. 2, July 1983, p. 191-206.

Astronomy and Astrophysics

Astronomy

20

Interplanetary Medium, Plasma Density, Radio Sources (Astronomy), Scintillation, Solar Wind Velocity, Plasma Spectra, Stellar Models

Scientific paper

Density inhomogeneities in the solar wind cause fluctuations regarding the emission of small diameter radio sources. Such fluctuations are called interplanetary scintillation (IPS). IPS has been studied to obtain information on both the solar wind and on the radio sources. In the present investigation it is attempted to extract information about the solar wind from simultaneous IPS observations at three radio frequencies and a single antenna. Data were recorded at frequencies of 270 MHz, 340 MHz, and 470 MHz on a 91 m telescope. Five different radio sources were observed. The observations are compared with theoretical predictions for spectra, cross-spectra, and cross-correlations using weak scattering theory and various models for the wavenumber spectrum of density inhomogeneities in the solar wind. Good fits are obtained over the observed wavenumbers to a spectrum modeled as a power law.

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