Study of turbulence in HI using radiointerferometers.

Details Study of turbulence in HI using radiointerferometers. Study of turbulence in HI using radiointerferometers.

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...293..507l&link_type=abstract

Astronomy and Astrophysics 293, 507-520 (1995)

Astronomy and Astrophysics

Astrophysics

40

Interstellar Medium: General, Structure, Turbulence, Radio Lines: Ism, Methods: Analytical

Scientific paper

A technique of statistical study of the 3D small-scale structure of HI through interferometric observations is presented. It allows for anisotropy in turbulence statistics. Analytical expressions for the structure functions and the spectrum of 3D random density are obtained. The results are applied to the interferometric study of turbulence in HI, and a simple relation between the measured visibility function and the 3D turbulence spectrum is found. The latter result makes the interferometric study of turbulence unique in the sense that ambiguities in the original and inverted data are shown to be the same. The application of theoretical conclusions to observational data revealed a shallow 3D spectrum of random density in the studied HI regions of the galactic disc.

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