4 papers · 1 filter
A Short Characteristic Solution for the 2.5D Transfer Equation in the Envelopes of O and B Stars
J. Zsargo, D. J. Hillier, L. N. Georgiev
We discuss work toward developing a 2.5D non-LTE radiative transfer code. Our code uses the short characteristic method with modifications to handle realistic 3D wind velocities. W…
Far-UV FUSE spectroscopy of the OVI resonance doublet in Sand2 (WO)
Paul A. Crowther, A. W. Fullerton, D. J. Hillier +10
We present Far-Ultraviolet Spectroscopic Explorer (FUSE) spectroscopy of Sand 2, a LMC WO-type Wolf-Rayet star, revealing the OVI resonance P Cygni doublet at 1032-38A. These data…
The gamma Velorum binary system. II. WR stellar parameters and the photon loss mechanism
Orsola De Marco, W. Schmutz, P. A. Crowther +4
In this paper we derive stellar parameters for the Wolf-Rayet star in the gamma Velorum binary system (WR11), from a detailed non-LTE model of its optical and infrared spectra. Com…
Wolf-Rayet nebulae as tracers of stellar ionizing fluxes: I. M1-67
P. A. Crowther, A. Pasquali, O. De Marco +3
We use WR124 (WN8h) and its associated nebula M1-67, to test theoretical non-LTE models for Wolf-Rayet (WR) stars. Lyman continuum ionizing flux distributions derived from a stella…