Large-scale structure of the Taurus molecular complex. II - Analysis of velocity fluctuations and turbulence. III - Methods for turbulence

Details Large-scale structure of the Taurus molecular complex. II - Analysis of velocity fluctuations and turbulence. III - Methods for turbulence Large-scale structure of the Taurus molecular complex. II - Analysis of velocity fluctuations and turbulence. III - Methods for turbulence

Aug 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...295..466k&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 295, Aug. 15, 1985, p. 466-484.

Astronomy and Astrophysics

Astrophysics

69

Flow Velocity, Interstellar Gas, Molecular Clouds, Turbulence Effects, Astronomical Maps, Autocorrelation, Carbon Monoxide, Statistical Analysis

Scientific paper

The velocity autocorrelation function (ACF) of observed spectral line centroid fluctuations is noted to effectively reproduce the actual ACF of turbulent gas motions within an interstellar cloud, thereby furnishing a framework for the study of the large scale velocity structure of the Taurus dark cloud complex traced by the present C-13O J = 1-0 observations of this region. The results obtained are discussed in the context of recent suggestions that widely observed correlations between molecular cloud widths and cloud sizes indicate the presence of a continuum of turbulent motions within the dense interstellar medium. Attention is then given to a method for the quantitative study of these turbulent motions, involving the mapping of a source in an optically thin spectral line and studying the spatial correlation properties of the resulting velocity centroid map.

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