Abstract Version 3.00 of the library of computed spectra in the NASA Ames PAH IR
Spectroscopic Database (PAHdb) is described. Version 3.00 introduces the use of multiple …

Dust is an essential component of the interstellar medium (ISM) and plays an important role
in many different astrophysical processes and phenomena. Traditionally, dust grains are …

The astronomical emission features, formerly known as the unidentified infrared bands, are
now commonly ascribed to polycyclic aromatic hydrocarbons (PAHs). The laboratory …

A first look is taken at the NIRSpec 1–5 μm observations from James Webb Space
Telescope program 1591 that targets seven objects along the low-mass stellar life cycle with …

Stellar systems are often formed through the collapse of dense molecular clouds which, in
turn, return copious amounts of atomic and molecular material to the interstellar medium. An …

Context. Indene, a small PAH, has been detected in the gas phase in the cold dense cloud
TMC-1. Due to the low temperature in the cloud, below indene condensation temperature, its …

Context. The UV photoreactivity of polycyclic aromatic hydrocarbons (PAHs) in porous
amorphous solid water has long been known to form both oxygenated photoproducts and …

The interaction of polycyclic aromatic hydrocarbon molecules with water (H2O= W) is of
fundamental importance in chemistry and biology. Herein, size-selected microhydrated …

Context. Extended red emission (ERE) denotes a broad unassigned feature extending from
540 to 800 nm observed in many regions of the interstellar medium (ISM), and is thought to …

The influence of incremental hydration (≤ 4) on the electronic resonances of the pyrene
anion is studied using two-dimensional photoelectron spectroscopy. The photoexcitation …