ISO-SWS observations and model atmospheres of carbon- and oxygen-rich AGB variables
- Author(s)
- Rita Loidl, Bernhard Aringer, Josef Hron, Franz Kerschbaum, Susanne Höfner, Uffe Grae Jorgensen, W Windsteig
- Abstract
The ISO-SWS spectra of several representative carbon- and oxygen-rich AGB variables (R Aql, R Cas, T Dra, V Cyg, V CrB and R Scl) were obtained at several phases of their pulsational cycle. This allows us to study the molecular features and the dust emission of these objects as a function of stellar parameters as well as pulsational phase. The observational data are compared with synthetic molecular spectra based on hydrostatic models (MARCS) and on dynamical atmospheres, which include such phenomena as pulsation, mass loss and dust formation. Some aspects of the SWS spectra like their variations can only be explained by dynamical atmospheres. To be able to analyse also the targets with significant mass loss, we also included a dust component in the synthetic spectra. On the basis of these synthetic spectra we also investigate the influence of molecular features on the interpretation of the dust emission and vice versa. This is of special importance in the 8-16 μm region.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- University of Vienna, University of Copenhagen
- Journal
- The Universe as Seen by ISO
- Volume
- ESA SP-427
- Pages
- 365
- Publication date
- 03-1999
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/029cb472-ace3-4876-8e67-f1788e7602f3