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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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2019 October 30
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| In: |
The astrophysical journal
Year: 2019, Jahrgang: 885, Heft: 1, Pages: 50 |
| ISSN: | 1538-4357 |
| DOI: | 10.3847/1538-4357/ab46ba |
| Online-Zugang: | Verlag, Volltext: https://doi.org/10.3847/1538-4357/ab46ba
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| Verfasserangaben: | 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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| 520 | |a 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. | ||
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