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Barlow, M. Matsuura, P.C. Hargrave, P. Imhof, P. Royer, R. Huygen, R.J. Ivison, R. Wesson, S.J. Leeks, S. Regibo, T. Lim, T. Posch, W. De Meester, W.K. Gear","submitted_at":"2010-05-25T19:56:29Z","abstract_excerpt":"The interstellar medium is enriched primarily by matter ejected from evolved low and intermediate mass stars. The outflows from these stars create a circumstellar envelope in which a rich gas-phase and dust-nucleation chemistry takes place. We observed the nearest carbon-rich evolved star, IRC+10216, using the PACS (55-210 {\\mu}m) and SPIRE (194-672 {\\mu}m) spectrometers on board Herschel. We find several tens of lines from SiS and SiO, including lines from the v=1 vibrational level. 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