| |
 |
| Paper: |
Dust in Stellar Winds: A Micro- and Macroscopic View |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
395 |
| Authors: |
Mečina, M.; Groenewegen, M. A. T.; Kerschbaum, F.; Aringer, B.; Nowotny, W.; Ottensamer, R.; Mayer, A.; Luntzer, A. |
| Abstract: |
In the course of the MESS Guaranteed Time Key Program,
geometrically thin and overall spherically symmetric detached
shells were observed with Herschel/PACS amongst a
morphologically diverse sample of (post-)AGB stars. We use 1D dust
radiative transfer modelling to determine shell properties such as
the dust mass, the corresponding mass-loss rate (MLR) and dust
temperature, in order to assess the possible scenarios of shell
formation. As an example we present the case of the carbon star
U Hya. For the modelling the chosen dust properties are crucial,
and we show the key aspects and their effect on the results obtained.
We further attempt to establish a physical model of the observed
stellar dust envelope by means of a stationary wind code to test
whether an abrupt change in the MLR can cause the observed detached
shell. |
|
|
|
|
|
