The following document lists the file abstract/RWATERS_LMCBE.abs
from catalogue VI/111.
A plain copy of the file
(without headers/trailers) may be downloaded.
We propose to observe bright massive B[e] supergiants in the LMC and SMC in order to study their circumstellar environment. This environment is very complex, with regions where gas flows out at high velocity and other regions where gas is very cool, dust is formed and the outflow velocities are low. It is suggested that B[e] stars are rapidly rotating post-main-sequence stars, but the precise nature of the stars (just evolved off the main sequence, or post-red-supergiant) is not understood. The ISO observations will provide us with new insights into the mass loss and wind structure by measuring the 2-12 micron spectrum in low resolution. This will give us the line strengths of H and He emission lines, as well as several forbidden lines. In addition, we request for the brightest three stars full SWS scans in order to investigate the 10-45 micron spectral region. Many dust and line features can be found that are crucial for a better understanding of the evolutionary status of these stars. ISO is the only instrument that will be able to provide the 10-45 micron data with a resolution of 500-1000, and the requested PHOT-S spectra are very difficult to obtain from the ground.