Six anions have been conclusively detected in the interstellar medium (ISM). They all arrived
within a five-year window ending five years ago. Why have no new anions been detected? It …

High-dispersion observations of the Na i D λλ5890, 5896 and K i λλ7665, 7699 interstellar
lines, and the diffuse interstellar band at 5780 Å in the spectra of 32 Type Ia supernovae are …

We set out to determine stellar labels from low-resolution survey spectra of hot stars,
specifically OBA stars with T eff≳ 7500 K. This fills a gap in the scientific analysis of large …

By 2050, many, but not nearly all, unattributed astronomical spectral features will be
conclusively linked to molecular carriers (as opposed to nearly none today in the visible and …

Echelle spectra of HD 183143 [B7Iae, E (B− V)= 1.27] were obtained on three nights, at a
resolving power R= 38,000 and with a signal-to-noise ratio≈ 1000 at 6400 Å in the final …

We establish correlations between equivalent widths of eight diffuse interstellar bands
(DIBs), and examine their correlations with atomic hydrogen, molecular hydrogen, and EB …

In this era of large-scale spectroscopic stellar surveys, measurements of stellar attributes ("
labels," ie, parameters and abundances) must be made precise and consistent across …

Aiming for a new and more comprehensive DIB catalog between 4000 and 9000 Å, we
revisited the Atlas Catalog based on the observations of HD 183143 and HD 204827 …

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 …

We discuss the proposal of relating the origin of some of the diffuse interstellar absorption
bands (DIBs) to neutral polycyclic aromatic hydrocarbons (PAHs) present in translucent …