TY - JOUR A1 - Gosset, E. T1 - Studies of WR+O colliding-wind binaries T2 - Wolf-Rayet Stars : Proceedings of an International Workshop held in Potsdam, Germany, 1.–5. June 2015 N2 - Two of the main physical parameters that govern the massive star evolution, the mass and the mass-loss rate, are still poorly determined from the observational point of view. Only binary systems could provide well constrained masses and colliding-wind binaries could bring some constraints on the mass-loss rate. Therefore, colliding-wind binaries turn out to be very promising objects. In this framework, we present detailed studies of basic observational data obtained with the XMM-Newton facility and combined with ground-based observations and other data. We expose the results for two particularly interesting WR+O colliding-wind binaries: WR22 and WR21a. Y1 - 2015 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/8824 UR - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus4-88247 SP - 305 EP - 308 ER -