000002603 001__ 2603
000002603 005__ 20160701171707.0
000002603 037__ $$aASTROimport-760
000002603 100__ $$aLobel, A.
000002603 245__ $$aThree dimensional radiative transfer in winds of massive stars: Wind3D
000002603 260__ $$c2007
000002603 520__ $$aRadiative transfer calculations in three dimensions are presented to investigate dynamic structures in extended winds of massive stars. We discuss the development of the new radiative transfer code Wind3D. It solves the non-LTE radiative transport problem in moving stellar atmosphere models in three geometric dimensions. The code accepts arbitrary 3D velocity fields in Cartesian geometry without assumptions of axial symmetry. Wind3D is currently implemented as a fully parallelized (exact) accelerated lambda iter- ation scheme with a two level atom formulation. The numerical transfer scheme is efficient and very accurate to trace small variations of local velocity gradients on line opacity in strongly scattering dominated extended stellar winds. We in- vestigate the detailed formation of P Cygni line profiles observed in ultraviolet spectra of massive stars. We compute the detailed shape of these resonance lines to model local enhancements of line opacity that can for instance be caused by clumping in supersonically expanding winds. Wind3D will be applied to hy- drodynamic models to investigate physical properties of discrete absorption line components. 
000002603 700__ $$a Blomme, R.
000002603 773__ $$c119$$pUV Astronomy: Stars from Birth to Death$$y2007
000002603 85642 $$ahttp://esoads.eso.org/abs/2007uasb.conf..119L
000002603 905__ $$apublished in
000002603 980__ $$aNONREF