| |
 |
| Paper: |
A Spiral Goes Viral: Observations and Modeling of the Circumstellar Envelope around R Sculptoris |
| Volume: |
497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time |
| Page: |
215 |
| Authors: |
Brunner, M.; Maercker, M.; Vlemmings, W.H.T.; Mečina, M.; Kerschbaum, F.; Mayer, A.; Humphreys, E. |
| Abstract: |
The complex circumstellar envelope (CSE) around the carbon-rich
asymptotic giant branch (AGB) star R Sculptoris has been observed
with ALMA, revealing a remarkable and up to now unique geometry,
consisting of a thin, spherically symmetric detached shell enclosing
a spiral structure. By comparing ALMA data in three different spectral
bands – covering different excitation states of the CO molecule –
the gas structure and mass-loss evolution of this object can be
analyzed. A morphological comparison between molecular line data
(ALMA) and dust images (Herschel\//PACS) gives hints to the
spatial distribution of both constituents of the circumstellar
envelope, as well as interaction processes between the different
media. Dust continuum radiative transfer modeling of the detached
shell around R Scl allows us to constrain the dust parameters and
delivers spectral energy distributions comparable to observations. |
|
|
|
|
|
