During her PhD, Dr Johnston has previously studied the relationship between ionised and molecular gas in star formation regions using the VLA (Johnston et al. 2009, Johnston et al., 2013), which continued with the study of young HII regions with ALMA (e.g. Klaassen et al. 2018).
Dr Johnston also has a research interest in jets from massive YSOs (e.g. Johnston et al. 2013). She is one of the team members of the e-MERLIN Massive Star Formation legacy programme (PI M. Hoare, Leeds). The programme has observed over thirty massive YSOs at 40mas resolution, to resolve the ionised gas from these young stars, tracing jets and hypercompact HII regions at size scales matched to those where the dust and molecular circumstellar material can be traced by ALMA.
Following on from projects such as Obonyo et al. (2019; 2021), Dr Johnston has also observed the jets from several massive forming stars to investigate their variability with the e-MERLIN array, which is an invaluable window into the accretion history of massive stars and the kinematics of their jets.
