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Relations between molecular cloud structure sizes and line widths in the large magellanic cloud

We present a comparative study of the size-line width relation for substructures within six molecular clouds in the Large Magellanic Cloud (LMC) mapped with the Atacama Large Millimeter/submillimeter Array. Our sample extends our previous study, which compared a Planck detected cold cloud in the out...

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Bibliographic Details
Main Authors: Wong, Tony (Author) , Glover, Simon (Author) , Klessen, Ralf S. (Author)
Format: Article (Journal)
Language:English
Published: 2019 October 30
In: The astrophysical journal
Year: 2019, Volume: 885, Issue: 1, Pages: 50
ISSN:1538-4357
DOI:10.3847/1538-4357/ab46ba
Online Access:Verlag, Volltext: https://doi.org/10.3847/1538-4357/ab46ba
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Author Notes:Tony Wong, Annie Hughes, Kazuki Tokuda, Rémy Indebetouw, Toshikazu Onishi, Jeffrey B. Bandurski, C.-H. Rosie Chen, Yasuo Fukui, Simon C. O. Glover, Ralf S. Klessen, Jorge L. Pineda, Julia Roman-Duval, Marta Sewiło, Evan Wojciechowski, and Sarolta Zahorecz
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Summary:We present a comparative study of the size-line width relation for substructures within six molecular clouds in the Large Magellanic Cloud (LMC) mapped with the Atacama Large Millimeter/submillimeter Array. Our sample extends our previous study, which compared a Planck detected cold cloud in the outskirts of the LMC with the 30 Doradus molecular cloud and found the typical line width for 1 pc radius structures to be five times larger in 30 Doradus. By observing clouds with intermediate levels of star formation activity, we find evidence that the line width at a given size increases with increasing local and cloud-scale 8 μm intensity. At the same time, the line width at a given size appears to independently correlate with measures of the mass surface density. Our results suggest that both virial-like motions due to gravity and local energy injection by star formation feedback play important roles in determining intracloud dynamics.
Item Description:Gesehen am 16.01.2020
Physical Description:Online Resource
ISSN:1538-4357
DOI:10.3847/1538-4357/ab46ba

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