What causes the dispersion of the O-star X-ray luminosities questionMark

Otype Xray luminosity scales with their bolometric luminosity according tocanonical relation: log L_X/L_bol virgul 7. Yet, significant dispersion is observedaround this relation. Binarity was often considered as a natural explanation tothe observed dispersion but recent investigations tend to disprove thisstatement. We propose to investigate the impact of magnetic wind confinement onthe Xray properties of O stars, and whether or not it can explain the spreadaround the canonical relation. The nearby young open cluster, IC2944, hosts arich latetype Ostar population and is ideally suited for our purpose. It willallow us to investigate with unprecedented details a region of the parameterspace where magnetic confinement is expected to have the strongest impact. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]