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Modeling multidimensional effects in the propagation of radiative shocks
Sébastien Leygnac, Laurent Boireau, Claire Michaut +4
Radiative shocks (also called supercritical shocks) are high Mach number shock waves that photoionize the medium ahead of the shock front and give rise to a radiative precursor. Th…
A Grid of NLTE Line-Blanketed Model Atmospheres of Early B-type Stars
Thierry Lanz, Ivan Hubeny
We have constructed a comprehensive grid of 1540 metal line-blanketed, NLTE, plane-parallel, hydrostatic model atmospheres for the basic parameters appropriate to early B-type star…
Iron in Hot DA White Dwarfs
Stephane Vennes, Pierre Chayer, Jean Dupuis +1
We present a study of the iron abundance pattern in hot hydrogen-rich (DA) white dwarfs. The study is based on new and archival far ultraviolet spectroscopy of a sample of white dw…
Neon Abundances in B-Stars of the Orion Association: Solving the Solar Model Problem?
Katia Cunha, Ivan Hubeny, Thierry Lanz
We report on non-LTE Ne abundances for a sample of B-type stellar members of the Orion Association. The abundances were derived by means of non-LTE fully metal-blanketed model atmo…