hydrodynamics

Can single O stars produce non-thermal radio emission?

We present a model for the non-thermal radio emission from presumably single O stars, in terms of synchrotron emission from relativistic electrons accelerated in wind-embedded shocks. These shocks are associated with an unstable, chaotic wind. The …

A pseudo-planar, periodic-box formalism for modelling the outer evolution of structure in spherically expanding stellar winds

We present an efficient technique to study the 1D evolution of instability-generated structure in winds of hot stars out to very large distances (~1000 stellar radii). This technique makes use of our previous finding that external forces play little …

Clumps and shocks in the outer winds of hot stars

We present a moving periodic box technique to study the outer-wind evolution of instability-generated structure in hot-star winds. This has considerable computational and conceptual advantages

The Outer Evolution of Structure in Radiatively Driven Stellar Winds

We present a new method to study the evolution of instability-generated structure in the outer winds of hot stars. We coin this method a pseudo-planar moving periodic box technique. It makes use of the fact that the outer evolution of structure can …

The outer evolution of instability-generated structure in radiatively driven stellar winds

We investigate stochastic structure in hot-star winds. The structure (i.e. inhomogeneities such as clumps and shocks) is generated by the instability of the line driving mechanism in the inner wind. It is self-excited in the sense that it persists …

Outer Wind Evolution of Instability-Generated Clumped Structure in Hot Star Winds

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The importance of continuum radiation for the stellar wind hydrodynamics of hot stars

The contribution of bound-free and free-free processes to the outward acceleration of zeta Pup is studied and is found to be negligible.