The Intrinsic Shapes of Molecular Cloud Fragments over a Range of Length Scales

Details The Intrinsic Shapes of Molecular Cloud Fragments over a Range of Length Scales The Intrinsic Shapes of Molecular Cloud Fragments over a Range of Length Scales

2001-12-19

arxiv.org/abs/astro-ph/0112463v1

Astronomy and Astrophysics

Astrophysics

12 pages, 11 figures. Version with color figures can be found at http://www.astro.uwo.ca/~cjones/ or http://www.astro.uwo.ca/~

Scientific paper

10.1086/339230

We decipher intrinsic three-dimensional shape distributions of molecular clouds, cloud cores, Bok globules, and condensations using recently compiled catalogues of observed axis ratios for these objects mapped in carbon monoxide, ammonia, through optical selection, or in continuum dust emission. We apply statistical techniques to compare assumed intrinsic axis ratio distributions with observed projected axis ratio distributions. Intrinsically triaxial shapes produce projected distributions which agree with observations. Molecular clouds mapped in $^{12}$CO are intrinsically triaxial but more nearly prolate than oblate, while the smaller cloud cores, Bok globules, and condensations are also intrinsically triaxial but more nearly oblate than prolate.

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