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The Smallest Sizes of Diffuse Interstellar Clouds (1984)

Dickey, J. M. ; Crovisier, J. ; Kazes, I.

In: CASI

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Publication Date: 2014-09-16

Description: By observing the difference in optical depths between absorption spectra toward the two components of double sources, the variations in opacity over lengths of less than 0.1 up to 10 pc inside diffuse interstellar clouds were measured. Significant variations were detected on scales larger than about 0.2 pc, but not less. This may represent the minimum size for diffuse cloud structure. By comparing the variations of Gaussian fitted line parameters, it was found that variations in the internal velocity field of diffuse clouds explain the data better than tiny independent cloudlets.

Keywords: ASTROPHYSICS

Type: NASA. Goddard Space Flight Center Local Interstellar Medium, No. 81; p 258-262

Format: text

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