Journal Article

Molecular line mapping of the giant molecular cloud associated with RCW 106 – III. Multimolecular line mapping

N. Lo, M. R. Cunningham, P. A. Jones, I. Bains, M. G. Burton, T. Wong, E. Muller, C. Kramer, V. Ossenkopf, C. Henkel, G. Deragopian, S. Donnelly and E. F. Ladd

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 395, issue 2, pages 1021-1042
Published in print May 2009 | ISSN: 0035-8711
Published online April 2009 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2009.14594.x
Molecular line mapping of the giant molecular cloud associated with RCW 106 – III. Multimolecular line mapping

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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.

Keywords: stars: formation; ISM: clouds; ISM: molecules; ISM: structure; radio lines: ISM

Journal Article.  10329 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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