A coupled hydrodynamic-ionisation
model for the clumpy Wolf-Rayet ring nebula RCW 58
S. J. Arthur, W. J. Henney & J. E. Dyson
Submitted to Astronomy & Astrophysics
Abstract:
We present a time-dependent hydrodynamic model for the Wolf-Rayet ring
nebula RCW 58 that includes a self-consistent treatment of the
non-equilibrium evolution of the ionisation state of the gas. We
investigate the feasibility of hydrodynamic ablation from embedded
dense clumps in the nebula being responsible for the high-velocity
ultraviolet absorption features observed towards the central star. It
is found that the observed correlation between the velocity
of these features and the ionisation potential of the absorbing ion
can be qualitatively reproduced by such a model. The calculated
velocity range depends strongly on the adopted wind velocity.
Available as.............
Will Henney