A Spectral Line Survey of IRAS 17470-2853 from 86.1 to 92.1 GHz

• DOI: 10.1071/as01094
• Publication Date: 2003-03-06T22:33:32Z
• Authors: Hun-Dae Kim; Ramesh Balasubram...; Michael G. Burton
• Keywords: Line (geometry); Young stellar object

Abstract We present results from a spectral line survey of the young stellar object IRAS 17470-2853, undertaken to examine chemical changes during evolution hot molecular cores ultracompact HII regions. Observations were carried out with Mopra 22 m radio telescope in frequency range 86.1 92.1 GHz. A total 21 lines 9 molecules detected. Except for CH 3 CN they are all simple molecules. compare region G34.3+0.15, where surveys 80–115 GHz and 330–360 have been performed. While detected similar, their widths intensities somewhat narrower lower, respectively, 17470-2853. The typical width ˜5 km s −1 indicates relatively quiet or quasi-thermal emission. On other hand, significant difference T * (HNC)/ *(HCN) has found: 0.8 17470-2853 compared 2.6 G34.3+0.15. broad SiO (υ=0, J=2–1), ˜9 , suggests that is experiencing shock generated by embedded object. Column densities, lower limits them, derived observed