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 …

Within the precise cosmological framework provided by the Λ-cold dark matter model and
standard Big Bang nucleosynthesis, the chemical evolution of the pregalactic gas can now …

Increasingly, uncertainties in predictions from galaxy formation simulations (at sub-Milky
Way masses) are dominated by uncertainties in stellar evolution inputs. In this paper, we …

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 …

We study the formation of the first generation of stars in the standard cold dark matter model.
We use a very high resolution cosmological hydrodynamic simulation that achieves a …

We present results from high-resolution three-dimensional simulations of turbulent
interstellar gas that self-consistently follow its coupled thermal, chemical and dynamical …

We report results from numerical simulations of star formation in the early universe that focus
on the dynamical behavior of metal-free gas under different initial and environmental …

At low temperatures, the main coolant in primordial gas is molecular hydrogen, H2. Recent
work has shown that primordial gas that is not collapsing gravitationally but is cooling from …

We present a simplified chemical and thermal model designed to allow computationally
efficient study of the thermal evolution of metal-poor gas within large numerical simulations …

We present the results of three-dimensional radiation hydrodynamics simulations of the
formation and evolution of early H II/He III regions around the first stars. Cooling and …