PACS spectroscopy of OH/IR stars
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Publication date
2011
Authors
Lombaert, R.
de Vries, B.L.
Decin, L.
Blommaert, J.A.D.L.
Royer, Pierre
De Beck, E.
de Koter, A.
Waters, L.B.F.M.
Editors
Wing, R.F. Kerschbaum, F., Lebzelter, T.
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Supervisors
DOI
Document Type
Part of book
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Abstract
Observations of high-excitation molecular emission lines can greatly increase our understanding of AGB winds, as they trace the innermost regions of the circumstellar envelope. The PACS spectrometer on-board the Herschel Space Telescope1, provides for the first time the spectral resolution and sensitivity necessary to trace these lines. We report on the first modelling efforts of a PACS spectral scan for the OH/IR star V669 Cas. Central to our methodology is the consistent treatment of both dust and gas by using a line radiative transfer and a continuum radiative transfer code conjointly. Water emission lines are found to be extremely sensitive to the dust-to-gas ratio, emphasizing the need of consistent modelling for dust and gas.
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International (English)
Citation
Lombaert, R, de Vries, B L, Decin, L, Blommaert, J A D L, Royer, P, De Beck, E, de Koter, A & Waters, L B F M 2011, PACS spectroscopy of OH/IR stars. in L T Wing, R.F. Kerschbaum, F. (ed.), Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants. Astronomical Society of the Pacific, San Francisco, pp. 309.