期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 395, 期 2, 页码 1021-1042出版社
OXFORD UNIV PRESS
DOI: 10.1111/j.1365-2966.2009.14594.x
关键词
stars: formation; ISM: clouds; ISM: molecules; ISM: structure; radio lines: ISM
资金
- Commonwealth of Australia
- CSIRO
- Australian Research Council
- Centro de Astrofi sica FONDAP [15010003]
- GEMINI-CONICYT FUND
- NASA
We present multimolecular line maps obtained with the Mopra telescope towards the southern giant molecular cloud (GMC) complex G333, associated with the H II region RCW 106. We have characterized 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 linewidth, but a strong correlation between emission luminosity and linewidth. PCA classifies molecules into high- and low-density tracers, and reveals that HCO+ and N2H+ are anticorrelated.
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