Molecular absorption and emission bands dominate the visible, infrared, and submillimeter
spectra of most objects with associated gas. These observations reveal a surprisingly rich …

In this review/tutorial we explore planetary nebulae as a stage in the evolution of low-to-
intermediate-mass stars, as major contributors to the mass and chemical enrichment of the …

Here we introduce the interstellar dust modelling framework THEMIS (The Heterogeneous
dust Evolution Model for Interstellar Solids), which takes a global view of dust and its …

Context. The evolution of amorphous hydrocarbon materials, aC (: H), principally resulting
from ultraviolet (UV) photon absorption-induced processing, are likely at the heart of the …

Fullerenes have recently been detected in various circumstellar and interstellar
environments, raising the question of their formation pathway. It has been proposed that they …

Nanobowls represent vital molecular building blocks of end-capped nanotubes and
fullerenes detected in combustion systems and in deep space such as toward the planetary …

Recently, the presence of fullerenes in the interstellar medium (ISM) has been confirmed
and new findings suggest that these fullerenes may possibly form from polycyclic aromatic …

Context. There is a long-standing and large discrepancy between the timescale for dust
formation around evolved stars and the rapid dust destruction timescale in interstellar …

We suggest that the carrier of the unidentified infrared emission (UIE) bands is an
amorphous carbonaceous solid with mixed aromatic/aliphatic structures, rather than free …

Infrared spectra of carbon-rich objects that have evolved off the asymptotic giant branch
reveal a range of dust properties, including fullerenes, polycyclic aromatic hydrocarbons …