OH in the diffuse interstellar medium: physical modelling and prospects with upcoming SKA precursor/pathfinder surveys

Sergei Balashev, Neeraj Gupta, Daria Kosenko

Hydroxyl ($\mathrm{OH}$) is known to form efficiently in cold gas ($T\sim 100$K) along with the molecule ${\mathrm{H}}_2$ and can be used as an efficient tracer of the diffuse molecular gas in…