Gas and Dust Mass Loss of O-rich AGB-stars
- Author(s)
- Franz Kerschbaum, Hans Olofsson, Thomas Posch, Delgado D Gonzalez, Per Bergman
- Abstract
We present results from systematic surveys and subsequent modelling of circumstellar CO and SiO radio line emission of oxygen-rich semiregular and irregular variables of types SRa, SRb, and Lb, respectively. Results from high spatial resolution observations of a subsample of these objects with a more complex velocity structure in their CO profiles are presented; they show a clear evidence of deviations from spherically symmetric mass loss. The observations can be interpreted in terms of disks and/or axially symmetric outflows. Moreover, insights into the thermal emission from dust particles forming around these late type variables are presented. An identification of metal oxides and amorphous silicates in low and intermediate mass loss rate objects is also proposed.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Stockholm Observatory, Chalmers University of Technology
- Volume
- 16
- Pages
- 171-189
- No. of pages
- 19
- DOI
- https://doi.org/10.1002/9783527617647
- Publication date
- 2003
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucrisportal.univie.ac.at/en/publications/82f99263-ef90-4c86-8f79-812cbed32ff2