A multitude of phenomena—such as the chemical enrichment of the Universe, the mass
spectrum of planetary nebulae, white dwarfs and gravitational wave progenitors, the …

Binary interactions dominate the evolution of massive stars, but their role is less clear for low-
and intermediate-mass stars. The evolution of a spherical wind from an asymptotic giant …

Spherical asymmetries are prevalent within the outflows of AGB stars. Since binary
interaction with a stellar or planetary companion is thought to be the underlying mechanism …

The nebular circumstellar environments of cool evolved stars are known to harbour a rich
morphological complexity of gaseous structures on different length scales. A large part of …

In recent years, many questions have arisen regarding the chemistry of photochemical
products in the carbon-rich winds of evolved stars. To address them, it is imperative to …

Rotational transitions in vibrationally excited AlO and TiO—two possible precursors of dust—
were observed in the 300 GHz range (1 mm wavelength) toward the oxygen-rich asymptotic …

Many asymptotic giant branch (AGB) and supergiant stars exhibit extended detached shells
in the far-infrared, resembling rings or arcs. These structures have long been interpreted as …

Aims. We investigate the structure, dynamics, and chemistry of the molecule-rich nebula
around the stellar symbiotic system R Aqr, which is significantly affected by the presence of a …

Evolved low-to intermediate-mass stars are known to shed their gaseous envelope into a
large, dusty, molecule-rich circumstellar nebula which typically develops a high degree of …

We present a set of Atacama Large Millimeter/submillimeter Array (ALMA) continuum and
molecular line emission maps at~ 1 mm wavelengths of OH 231.8+ 4.2. This is a well …