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

• Verfasst von: Wong, Tony [VerfasserIn]
• Verfasst von: Glover, Simon [VerfasserIn]
• Verfasst von: Klessen, Ralf S. [VerfasserIn]
• Titel: Relations between molecular cloud structure sizes and line widths in the large magellanic cloud
• Verf.angabe: 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
• E-Jahr: 2019
• Jahr: 2019 October 30
• Umfang: 17 S.
• Fussnoten: Gesehen am 16.01.2020
• Titel Quelle: Enthalten in: The astrophysical journal / 1
• Ort Quelle: London : Institute of Physics Publ., 1996
• Jahr Quelle: 2019
• Band/Heft Quelle: 885(2019,1) Artikel-Nummer 50, 17 Seiten
• ISSN Quelle: 1538-4357
• DOI: doi:10.3847/1538-4357/ab46ba
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 168756017X

Abstract

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.