| |
 |
| Paper: |
From Circumstellar Envelopes to the Interstellar Medium |
| Volume: |
445, Why Galaxies Care about AGB Stars II: Shining Examples and Common Inhabitants |
| Page: |
295 |
| Authors: |
Ueta, T. |
| Abstract: |
IRAS and ISO observations have indicated that the extended
dust shells of AGB stars could be explained by a simple model of a
constant past mass outflow piling up at the interface with the
interstellar medium (ISM).
Recent Spitzer observations have shown that even outflows from
AGB stars can induce shocks at the ISM–AGB wind interface, while
a recent AKARI survey of the circumstellar envelopes of
evolved stars have revealed far-IR structures resembling to the
interface regions between the ISM and AGB winds in many objects.
There have been observations made in other wavelengths (especially
in the UV with GALEX) that corroborate these findings in the
far-IR. New Herschel observations are expected to provide
detailed views of these interface regions. Therefore, the extended
dust shells of AGB stars should not only allow us to prove the
mass-loss history of the parent AGB stars but also permit us to
glimpse how the ejecta eventually merge with the ISM.
In this review, I will summarize recent research developments
made by observations with Spitzer, AKARI, and
Herschel at the interface region between the circumstellar
envelopes of AGB stars and the ISM. |
|
|
|
|
|
