Introduction: the context of hot star
X-rays
Line profile diagnostics
What do the observations look like?
What trends emerge?
z Pup: wind X-rays, but less
absorption than expected
z Ori and d
Ori: similar situation, very little wind absorption; but wind-shock parameters are otherwise satisfactory
Magnetic
OB stars are a different story: q1 Ori C, t Sco, g Cas
And so are
normal B stars: b Cru, e CMa
Conclusions