Context. Mid-infrared observations of photodissociation regions (PDRs) are dominated by
strong emission features called aromatic infrared bands (AIBs). The most prominent AIBs are …

Most low-mass stars form in stellar clusters that also contain massive stars, which are
sources of far-ultraviolet (FUV) radiation. Theoretical models predict that this FUV radiation …

Polycyclic aromatic hydrocarbons (PAHs) are a ubiquitous component of the interstellar
medium (ISM) in z∼ 0 massive, star-forming galaxies and play key roles in ISM energy …

The gas-phase abundance of carbon, x C=[C/H] gas= x C++ x C 0+ x CO+…, and its
depletion factors are essential parameters for understanding the gas and solid compositions …

This study analyses JWST MIRI/MRS observations of the infrared (IR) polycyclic aromatic
hydrocarbon (PAH) bands in the nuclear (∼ 0.4 ″at 11 μm;∼ 75 pc) and circumnuclear …

We present maps of ionized gas (traced by Paα and Brα) and 3.3 μm polycyclic aromatic
hydrocarbon (PAH) emission in the nearby spiral galaxy NGC 628, derived from new …

Context. Extraordinary observations of the Orion Bar by JWST have shown, for the first time,
the incredible richness of polycyclic aromatic hydrocarbon (PAH) emission bands and their …

We investigate the emergence phase of young star clusters in the nearby spiral galaxy NGC
628. We use JWST NIRCam and MIRI observations to create spatially resolved maps of the …

Aromatic infrared bands (AIBs) are a set of broad emission bands at 3.3, 6.2, 7.7, 8.6, 11.2,
and 12.7 μm, seen in the infrared spectra of most galaxies. With the James Webb Space …

Context. Interstellar dust particles, in particular carbonaceous nano-grains (like polycyclic
aromatic hydrocarbons, fullerenes, and amorphous hydrogenated carbon), are critical …