The 30 Doradus Molecular Cloud at 0.4 pc Resolution with the Atacama Large Millimeter/submillimeter Array

Autor(en)

Tony Wong, Luuk Oudshoorn, Eliyahu Sofovich, Alex Green, Charmi Shah, Rémy Indebetouw, Margaret Meixner, Alvaro Hacar, Omnarayani Nayak, Kazuki Tokuda, Alberto D. Bolatto, Mélanie Chevance, Guido De Marchi, Yasuo Fukui, Alec S. Hirschauer, K. E. Jameson, Venu Kalari, Vianney Lebouteiller, Leslie W. Looney, Suzanne C. Madden, Toshikazu Onishi, Julia Roman-Duval, Mónica Rubio, A. G. G. M. Tielens

Abstrakt

We present results of a wide-field (approximately 60 × 90 pc)

Atacama Large Millimeter/submillimeter Array mosaic of CO(2-1) and

13CO(2-1) emission from the molecular cloud associated with

the 30 Doradus star-forming region in the Large Magellanic Cloud (LMC).

Three main emission complexes, including two forming a bow-tie-shaped

structure extending northeast and southwest from the central R136

cluster, are resolved into complex filamentary networks. Consistent with

previous studies, we find that the central region of the cloud has

higher line widths at a fixed size relative to the rest of the molecular

cloud and to other LMC clouds, indicating an enhanced level of turbulent

motions. However, there is no clear trend in gravitational boundedness

(as measured by the virial parameter) with distance from R136.

Structures observed in 13CO are spatially coincident with

filaments and are close to a state of virial equilibrium. In contrast,

12CO structures vary greatly in virialization, with low CO

surface brightness structures outside of the main filamentary network

being predominantly unbound. The low surface brightness structures

constitute ~10% of the measured CO luminosity; they may be shredded

remnants of previously star-forming gas clumps, or alternatively the

CO-emitting parts of more massive, CO-dark structures.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

University of Illinois at Urbana-Champaign, Leiden University, University of Virginia, National Radio Astronomy Observatory, Charlottesville, NASA Ames Research Center, Space Telescope Science Institute, Kyushu University, National Institutes of Natural Sciences (NINS) , Osaka Metropolitan University, University of Maryland, College Park, Universität Heidelberg, European Space Research & Technology Centre (ESA/ESTEC), Nagoya University, Commonwealth Scientific and Industrial Research Organisation (CSIRO), Gemini Observatory, French Alternative Energies and Atomic Energy Commission (CEA), Universidad de Chile

Journal

The Astrophysical Journal

Band

932

Anzahl der Seiten

19

ISSN

0004-637X

DOI

https://doi.org/10.3847/1538-4357/ac723a

Publikationsdatum

06-2022

Peer-reviewed

Ja

ÖFOS 2012

103004 Astrophysik, 103003 Astronomie

Schlagwörter

ASJC Scopus Sachgebiete

Astronomy and Astrophysics, Space and Planetary Science

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/7ea227b8-24d5-447e-b7eb-1989f8e491e5