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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/2517
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dc.contributor.authorKim, Hun-Dae-
dc.contributor.authorBalasubramanyam, R.-
dc.contributor.authorBurton, M.G.-
dc.date.accessioned2007-05-29T05:52:22Z-
dc.date.available2007-05-29T05:52:22Z-
dc.date.issued2002-
dc.identifier.citationPublications of the Astronomical Society of Australia, 2002, Vol.19, p505-514en
dc.identifier.issn1323-3580-
dc.identifier.urihttp://hdl.handle.net/2289/2517-
dc.descriptionRestricted Access. Please click on the alternative location for the open-access full text.en
dc.description.abstractWe present results from a spectral line survey of the young stellar object IRAS17470-2853, undertaken to examine chemical changes during the evolution from hot molecular cores to ultracompact HII regions. Observations were carried out with the Mopra 22m radio telescope in the frequency range from 86.1 to 92.1GHz. A total of 21 lines from 9 molecules were detected. Except for CH3CN they are all simple molecules. We compare the results to the ultracompact HII region G34.3+0.15, where spectral line surveys in the frequency range 80-115GHz and 330-360GHz have been performed. While the molecular lines detected are similar, their widths and intensities are somewhat narrower and lower, respectively, in IRAS 17470-2853. The typical line width of ~5kms-1 indicates relatively quiet or quasi-thermal emission. On the other hand, a significant difference in TA* (HNC)/TA*(HCN) has been found: 0.8 for IRAS 17470-2853 compared to 2.6 for G34.3+0.15. The broad line width of SiO (υv=0, J=2-1), ~9kms-1, suggests that IRAS 17470-2853 is experiencing a shock generated by the embedded object. Column densities, or lower limits to them, are derived for observed molecules.en
dc.format.extent343483 bytes-
dc.format.mimetypeapplication/pdf-
dc.language.isoenen
dc.publisherAstronomical Society of Australiaen
dc.relation.urihttp://adsabs.harvard.edu/cgi-bin/bib_query?2002PASA...19..505Ken
dc.relation.urihttp://dx.doi.org/10.1071/AS01094en
dc.rights2002 Astronomical Society of Australiaen
dc.subjectHII regionsen
dc.subjectISM: individual (IRAS 17470-2853 = G0.55– 0.85)en
dc.subjectISM: moleculesen
dc.subjectISM: abundancesen
dc.subjectstars: formationen
dc.subjectradio lines: ISMen
dc.titleA spectral line survey of IRAS 17470-2853 from 86.1 to 92.1 GHzen
dc.typeArticleen
Appears in Collections:Research Papers (A&A)

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