We have undertaken the largest systematic study of the high-mass stellar initial mass
function (IMF) to date using the optical color–magnitude diagrams (CMDs) of 85 resolved …

Observations of clusters suffer from issues such as completeness, projection effects,
resolving individual stars, and extinction. As such, how accurate measurements and …

Recent analyses of mass segregation diagnostics in star-forming regions invite a
comparison with the output of hydrodynamic simulations of star formation. In this work we …

Context. There are a number of methods that identify stellar sub-structure in star forming
regions, but these do not quantify the degree of association of individual stars–something …

Context. Better understanding of star formation in clusters with high-mass stars requires
rigorous dynamical and spatial analyses of star-forming regions. Aims. We seek to …

Understanding the formation and evolution of high-mass star clusters requires comparisons
between theoretical and observational data to be made. Unfortunately, while the full phase …

Context. With the third release of the high-precision optical-wavelength Gaia survey, we are
in a better position than ever before to study young clusters. However, Gaia is limited in the …

We examine the level of substructure and mass segregation in the massive, young cluster
Westerlund 1. We find that it is relatively smooth, with little or no mass segregation, but with …

The next generation of ground-based optical/infrared (IR) telescopes will have primary
mirrors of up to 42m. To take advantage of the large potential increase in angular resolution …