Molecular line mapping of the giant molecular cloud associated with RCW 106 - III. Multi-molecular line mapping

Details Molecular line mapping of the giant molecular cloud associated with RCW 106 - III. Multi-molecular line mapping Molecular line mapping of the giant molecular cloud associated with RCW 106 - III. Multi-molecular line mapping

2009-02-14

arxiv.org/abs/0902.2452v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

24 pages, 21 figures accepted by MNRAS

Scientific paper

10.1111/j.1365-2966.2009.14594.x

We present multi-molecular line maps obtained with the Mopra Telescope towards the southern giant molecular cloud (GMC) complex G333, associated with the HII region RCW 106. We have characterised the GMC by decomposing the 3D data cubes with GAUSSCLUMPS, and investigated spatial correlations among different molecules with principal component analysis (PCA). We find no correlation between clump size and line width, but a strong correlation between emission luminosity and line width. PCA classifies molecules into high and low density tracers, and reveals that HCO+ and N2H+ are anti-correlated.

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