As low-and intermediate-mass stars reach the asymptotic giant branch (AGB), they have
developed into intriguing and complex objects that are major players in the cosmic gas/dust …

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 …

Context. The post-asymptotic giant branch (AGB) phase is arguably one of the least
understood phases of the evolution of low-and intermediate-mass stars. The two grids of …

We present a large set of theoretical isochrones, whose distinctive features mostly reside on
the greatly-improved treatment of the thermally-pulsing asymptotic giant branch (TP-AGB) …

We have introduced a fast and versatile computer code, GGCHEM, to determine the
chemical composition of gases in thermo-chemical equilibrium down to 100 K, with or …

Context. Emission lines from protoplanetary disks originate mainly in the irradiated surface
layers, where the gas is generally warmer than the dust. Therefore, interpreting emission …

Aims. We model the synthesis of molecules and dust in the inner wind of the oxygen-rich
Mira-type star IK Tau by considering the effects of periodic shocks induced by the stellar …

Aims. Solving the continuum radiative transfer equation in high opacity media requires
sophisticated numerical tools. In order to test the reliability of such tools, we present a …

An intermediate-mass star ends its life by ejecting the bulk of its envelope in a slow, dense
wind,,. Stellar pulsations are thought to elevate gas to an altitude cool enough for the …

The large amounts of dust detected in sub-millimeter galaxies and quasars at high redshift
pose a challenge to galaxy formation models and theories of cosmic dust formation. At z> 6 …