Dust properties in the circumstellar environment of carbon stars
- Autor(en)
- M. Mečina, B. Aringer, M. Brunner, F. Kerschbaum, M. A. T. Groenewegen, W. Nowotny
- Abstrakt
Herschel PACS imaging observations of carbon stars show well-resolved spherically symmetric detached shells around several objects. In the case of U Hya the shell is additionally detected in scattered visible light and in the far UV. The remarkable spherical symmetry justifies a straightforward application of 1D models to constrain the properties of the dust envelope, whose modulation in density is a consequence of short epochs of highly increased mass loss and/or wind-wind interaction between outflows of different velocity. We perform dust radiative transfer calculations, first based on a parametrised density distribution, and in a more sophisticated approach on a combination of stationary wind models. The impact of dust properties, particularly grain geometry, on the results is highlighted.
- Organisation(en)
- Institut für Astrophysik
- Externe Organisation(en)
- Università degli Studi di Padova, Royal Observatory of Belgium
- Band
- 14
- Seiten
- 466-467
- Anzahl der Seiten
- 2
- DOI
- https://doi.org/10.1017/S1743921318005082
- Publikationsdatum
- 12-2019
- ÖFOS 2012
- 103003 Astronomie, 103004 Astrophysik
- Schlagwörter
- ASJC Scopus Sachgebiete
- Public Health, Environmental and Occupational Health, Astronomy and Astrophysics, Nutrition and Dietetics, Medicine (miscellaneous), Space and Planetary Science
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/d2005fca-0fd7-431e-903f-7ea78060c6c3