Chemistry of nebulae around binary post-AGB stars: A molecular survey of mm-wave lines
Chemistry of nebulae around binary post-AGB stars: A molecular survey of mm-wave lines
Context. There is a class of binary post-asymptotic giant branch (post-AGB) stars that exhibit remarkable near-infrared (NIR) excess. Such stars are surrounded by Keplerian or quasi-Keplerian disks, as well as extended outflows composed of gas escaping from the disk. This class can be subdivided into disk- and outflow-dominated sources, depending …