8 papers · 1 filter
Linear line polarimetry modelling of pre-main sequence stars
Jorick S. Vink, J. E. Drew, T. J. Harries +1
We present emission line polarimetry data and modelling relevant to the circumstellar geometry and kinematics around pre-main sequence stars. For a sample of both Herbig Ae/Be star…
The winds of Luminous Blue Variables and the Mass of AG Car
Jorick S. Vink, Alex de Koter
We present radiation-driven wind models for Luminous Blue Variables (LBVs) and predict their mass-loss rates. A comparison between our predictions and the observations of AG Car sh…
Mass-loss predictions and stellar masses of early-type stars
Alex de Koter, Jorick S. Vink
We show that the stellar masses implied by our predictions of the wind properties of massive stars are in agreement with masses derived from evolution theory and from direct measur…
Do Herbig Ae/Be Stars have Discs?
Jorick S. Vink, Janet E. Drew, Tim H. Harries +1
H_alpha spectropolarimetry on Herbig Ae/Be stars shows that the innermost regions of intermediate mass (2 -- 15 M_sun) Pre-Main Sequence stars are flattened. This may be the best e…
Are all young stars disc accretors?
Jorick S. Vink, Janet E. Drew, Tim J. Harries +1
We now understand how low mass stars evolve through cloud collapse and disc accretion, but whether higher mass stars are also disc accretors is as yet unknown. Spectropolarimetry o…
The radiation driven winds of rotating B[e] supergiants
Inti Pelupessy, Henny J. G. L. M. Lamers, Jorick S. Vink
We have formulated the momentum equation for sectorial line driven winds from rotating stars including: (a) the oblateness of the star, (b) gravity darkening (von Zeipel effect), (…