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IRIS: A Generic Three-Dimensional Radiative Transfer Code
L. Ibgui, I. Hubeny, T. Lanz +1
We present IRIS, a new generic three-dimensional (3D) spectral radiative transfer code that generates synthetic spectra, or images. It can be used as a diagnostic tool for comparis…
The influence of rotation on optical emission profiles of O stars
D. John Hillier, Jean-Claude Bouret, Thierry Lanz +1
We study the formation of photospheric emission lines in O stars and show that the rectangular profiles, sometimes double peaked, that are observed for some stars are a direct cons…
New Observational Evidence of Flash Mixing on the White Dwarf Cooling Curve
Thomas M. Brown, Thierry Lanz, Allen V. Sweigart +3
Blue hook stars are a class of subluminous extreme horizontal branch stars that were discovered in UV images of the massive globular clusters omega Cen and NGC 2808. These stars oc…
Flash Mixing on the White Dwarf Cooling Curve: Spectroscopic Confirmation in NGC 2808
Thomas M. Brown, Thierry Lanz, Allen V. Sweigart +3
[Abridged] We present new HST FUV spectroscopy of 24 hot evolved stars in NGC2808, a massive globular cluster with a large population of "blue-hook" (BHk) stars. The BHk stars are…