Molecular Cloud Structures and Massive Star Formation in N159

The N159 star-forming region is one of the most massive giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC). We show the 12CO, 13CO, CS molecular gas lines observed with ALMA in N159 west (N159W) and N159 east (N159E). We relate the structure of the gas clumps to the properties of 24 m...

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Veröffentlicht in:The Astrophysical journal 2018-02, Vol.854 (2), p.154
Hauptverfasser: Nayak, O., Meixner, M., Fukui, Y., Tachihara, K., Onishi, T., Saigo, K., Tokuda, K., Harada, R.
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Sprache:eng
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Zusammenfassung:The N159 star-forming region is one of the most massive giant molecular clouds (GMCs) in the Large Magellanic Cloud (LMC). We show the 12CO, 13CO, CS molecular gas lines observed with ALMA in N159 west (N159W) and N159 east (N159E). We relate the structure of the gas clumps to the properties of 24 massive young stellar objects (YSOs) that include 10 newly identified YSOs based on our search. We use dendrogram analysis to identify properties of the molecular clumps, such as flux, mass, linewidth, size, and virial parameter. We relate the YSO properties to the molecular gas properties. We find that the CS gas clumps have a steeper size-linewidth relation than the 12CO or 13CO gas clumps. This larger slope could potentially occur if the CS gas is tracing shocks. The virial parameters of the 13CO gas clumps in N159W and N159E are low (
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aaab5f