Implications

• Assumptions:

  • B3V (M  6 M, Tp  20,000 K)
  • ve sin i = 225 km s-1 (line profiles)

• Domiciano de Souza et al. say:

  • Re = 12.0 R ═> No conventional model (radiation transfer + von Zeipel law Teff ∝ geff0.25 for gravity darkening + Roche approximation for gravitational potential) can reproduce the observed highly oblate ellipse, for any inclination.
  • So, must investigate internal angular momentum distribution, differential rotation, effect of gravity darkening on line profiles.