Morpho-Kinematics of the Circumstellar Environments around Post-AGB Stars
Toshiya Ueta, Hideyuki Izumiura, Issei Yamamura, Masaaki Otsuka
TL;DR
This study uses ALMA observations of CO lines and dust emission to analyze the morpho-kinematics of circumstellar environments around two post-AGB stars with different shell geometries.
Contribution
It provides new insights into the differences in gas and dust kinematics between elliptical and bipolar post-AGB circumstellar shells.
Findings
Elliptical shell shows different CO gas dynamics compared to bipolar shell.
Dust emission properties vary between the two types of shells.
The morpho-kinematic structures inform models of post-AGB evolution.
Abstract
We observed two proto-planetary nebulae, HD 56126 representing a source with an elliptical circumstellar shell and IRAS 16594-4656 representing a source with a bipolar circumstellar shell, with ALMA in the 12CO and 13CO J=3-2 lines and neighboring continuum to see how the morpho-kinematics of CO gas and dust emission properties in their circumstellar environments differ.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomy and Astrophysical Research · Astrophysics and Star Formation Studies