The Sun is our nearest star; it is also the most important star that determines life on Earth. A
large variety of phenomena observed on the Sun's surface, with potential impact on Earth, is …

We review the gas-phase chemistry in extraterrestrial space that is driven by reactions with
atomic and molecular ions. Ions are ubiquitous in space and are potentially responsible for …

We present the grackle chemistry and cooling library for astrophysical simulations and
models. grackle provides a treatment of non-equilibrium primordial chemistry and cooling for …

Collision processes among the constituents of low-temperature hydrogen plasmas (e, H, H+,
H−, H2, H+ 2, H+ 3) play a key role in technical plasma applications as well as in the …

We consider the influence on plasma recombination of the formation of negative and
molecular ions in a divertor plasma. We take into account different atomic processes …

In order to compare the X-wind with observations, one needs to be able to calculate its
thermal and ionization properties. We formulate the physical basis for the streamline-by …

The direct collapse model for the formation of massive seed black holes in the early
Universe attempts to explain the observed number density of supermassive black holes …

We report on mutual neutralization measurements between Li+ 7 and H− 1 at effective
center-of-mass collision energies in the range of 100 to 350 meV. We find that final states of …

Hydrogen Balmer lines are commonly used as spectroscopic effective temperature
diagnostics of late-type stars. However, reliable inferences require accurate model spectra …

The mutual neutralization of H+ and H− at low collision energies is studied by means of a
molecular close-coupling approach. All degrees of freedom are treated at the full quantum …