Abstract
Based on a CS and C34S survey of dense molecular-cloud cores in regions of high-mass-star formation, we analyze the correlations between line width and size (ΔV-L), as well as between mean density and size (n-L). There is virtually no correlation between ΔV and L (ΔV ∝ L 0.2±0.1). The velocity dispersion is several times higher in absolute value than that in CO and dark clouds of the same size. The mean density decreases with increasing size considerably faster than L −1, so the column density also decreases. Possible effects of selection and of the technique for determining object parameters on these results are discussed. Possible physical causes of the above correlations are considered.
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Translated from Pis’ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Zhurnal, Vol. 26, No. 12, 2000, pp. 933–937.
Original Russian Text Copyright © 2000 by Zinchenko.
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Zinchenko, I.I. Correlations between parameters of massive cores in interstellar molecular clouds. Astron. Lett. 26, 802–805 (2000). https://doi.org/10.1134/1.1331161
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DOI: https://doi.org/10.1134/1.1331161