Diffuse interstellar clouds have long been thought to be relatively devoid of molecules,
because of their low densities and high radiation fields. However, in the past ten years or so …

Observations of H+ 3 in the Galactic diffuse interstellar medium have led to various
surprising results, including the conclusion that the cosmic-ray ionization rate (ζ 2) is about …

This is a summary of the 2013 release of the plasma simulation code Cloudy. Cloudy
models the ionization, chemical, and thermal state of material that may be exposed to an …

We carried out a comprehensive far-UV survey of 12 CO and H 2 column densities along
diffuse molecular Galactic sight lines. This sample includes new measurements of CO from …

Diffuse interstellar clouds show large abundances of H+ 3 which can only be maintained by
a high ionization rate of H 2. Cosmic rays are the dominant ionization mechanism in this …

We performed a set of cosmological simulations of major mergers in galaxy clusters, in order
to study the evolution of merger shocks and the subsequent injection of turbulence in the …

Using accurate interaction potentials, we perform refined calculations of rate coefficients for
the fine-structure excitations in collisions of O (3 P) and C (3 P) with atomic hydrogen. The …

We investigate the temperature distribution of CO-dark molecular hydrogen (H2) in a series
of disc galaxies simulated using the arepo moving-mesh code. In conditions similar to those …

The optical filaments found in many cooling flows in galaxy clusters consist of low-density
(∼ 103 cm− 3) cool (∼ 103 K) gas surrounded by significant amounts of cosmic-ray and …

We present a detailed high spectral resolution (R∼ 40 000) study of five high-z damped
Lyman α systems (DLAs) and one sub-DLA detected along four QSO sightlines. Four of …