The following document lists the file abstract/KVDHUCHT_WRNEABUN.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
We wish to determine the Neon/Helium abundance ratio in Wolf-Rayet winds by measuring in SWS AOT Band-3A (12.0 - 16.5 micron) with AOT SWS06 the flux of the [NeII] 12.184 micron and [NeIII] 15.55 micron and the neighbouring HeII emission lines in WR stars with galactocentric distances ranging from 6 kpc to 10 kpc from the Sun. We wish simulataneous spectrophotometric observations in SWS AOT Band-1A (2.38 - 2.60) where emission lines of CIV, HeII and He I occur. The width of those spectral lines will be a measure of the WR steller wind velocities, since the [NeIII] lines are formed where the winds have reached their terminal velocities. The abundance and velocities together will allow the determination of mass loss rates. The Neon abundance determinations are a crucial check of stellar evolution models for massive stars, which predict a much larger than solar Neon abundance.