Dr Joachim Bestenlehner (Sheffield 2017–)
The R136 star cluster dissected with HST/STIS II. Physical properties of the most massive stars, Bestenlehner, Crowther, Caballero-Nieves et al. (2020).
Dr Saida Caballero-Nieves (Sheffield 2012–16)
Key publication: The R136 star cluster dissected with HST/STIS. I. Far-ultraviolet spectroscopic census and the origin of HeII 1640 in young star clusters, Crowther, Caballero-Nieves, Bostroem et al. (2016).
Dr Olivier Schnurr (Sheffield 2007–10)
Key publication: The R136 star cluster hosts several stars whose individual masses greatly exceed the accepted 150 Msun stellar mass limit, Crowther, Schnurr, Hirschi et al. (2010).