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The Driving of Hot Star Winds
Andreas A. C. Sander
In the regime of hot stars, winds were not seen as a common thing until the era of UV astronomy. Since we have access to the UV wavelength range, it has become clear that winds are…
Massive Stars in the Far and Extreme Ultraviolet
Andreas A. C. Sander
From the main sequence to their late evolutionary stages, massive stars spend most of their life as hot stars. Due to their high effective temperatures, the maximum of their emitte…
Investigating the impact of different velocity fields on the spectral appearance of Wolf-Rayet stars
Roel R. Lefever, Tomer Shenar, Andreas A. C. Sander +3
The emission line spectra of WR stars are often formed completely in the optically thick stellar wind. Hence, any assumption on the wind velocity law in a spectral analysis has a p…
The hydrogen clock to infer the upper stellar mass
Erin R. Higgins, Jorick S. Vink, Gautham N. Sabhahit +1
The most massive stars dominate the chemical enrichment, mechanical and radiative feedback, and energy budget of their host environments. Yet how massive stars initially form and h…
The enigmatic winds of Wolf-Rayet stars: Results from dynamically consistent atmosphere modelling
Andreas A. C. Sander
Line-driven stellar winds are ubiquitous among hot massive stars. In some cases they can become so strong, that the whole star is cloaked by an optically thick wind. The strong out…
Mass-loss implementation and temperature evolution of very massive stars
Gautham N. Sabhahit, Jorick S. Vink, Erin R. Higgins +1
Very massive stars (VMS) dominate the physics of young clusters due to their ionising radiation and extreme stellar winds. It is these winds that determine their lifepaths until ex…