Journal
ASTRONOMICAL JOURNAL
Volume 147, Issue 6, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-6256/147/6/141
Keywords
ISM: kinematics and dynamics; ISM: molecules; ISM: structure
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We present the results of the sulfur monoxide, SO, line emission observations of G0.253+0.016 with the Atacama Large Millimeter/Submillimeter Array at an angular resolution of 1 ''.7. The dense and massive molecular cloud of G0.253+0.016 is highly sub-structured, yet it shows no obvious signs of cluster formation. We found three outstanding features of the cloud from the SO emission, namely, shell structure with a radius of 1.3 pc, large velocity gradients of 20 km s(-1) pc(-1) with the cloud, and cores with large velocity dispersions (30-40 km s(-1)) around the shell structure. We suggest that these large-velocity dispersion cores will form high-mass stars in the future. In an attempt to explore the formation scenario of the dense cloud, we compared our results with numerical simulations; therefore, we propose that G0.253+0.016 may have formed due to a cloud-cloud collision process.
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