The magnetic desert from the MiMeS perspective

The Magnetism in Massive Stars (MiMeS) project surveyed over 550 bright O- and B-type stars with the aim to understand the population properties of their magnetic fields (Wade et al. 2016). Analyses of the entire sample of O-type stars are complete (Grunhut et al. 2017, Petit et al. 2019), as are detailed investigations of the known population of magnetic early B-type stars (Shultz et al. 2018, 2019ab, 2020). Analysis of the remaining population of normal B-type stars (e.g. Bennett et al. 2020) and classical Be stars (e.g. Wade et al. 2016) are in an advanced state. Using this unprecedented observational foundation, informed by recent theoretical modeling (e.g. Keszthelyi et al. 2020, Cerrahoglu et al. 2020), we are able to derive a variety of conclusions and constraints concerning the existence and properties of the magnetic desert.