Title: PACS spectroscopy of OH/IR stars
Authors: Lombaert, Robin
de Vries, Bernard Lammert
Decin, Leen
Blommaert, Joris
Royer, Pierre
De Beck, Elvire
de Koter, Alex
Waters, Laurentius
Issue Date: Nov-2010
Publisher: Astronomical soc pacific
Host Document: Why galaxies care about agb stars ii: shining examples and common inhabitants vol:445 pages:341-342
Conference: Why Galaxies Care About AGB Stars edition:2 location:Vienna date:16-20 August 2010
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 Telescope, 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.
Publication status: published
KU Leuven publication type: IC
Appears in Collections:Institute of Astronomy

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