===================================================================== ==> in this proposal, more time is being requested for hlamers.hotstars ===================================================================== the purpose of the proposal is to study the two-component stellar winds and the circumstellar disks of be supergiants in an attempt to understand the mechanism that is responsible for the formation of the disks. studying be supergiants with the sws instruments will allow us to derive four important parameters that describe the the stellar wind and the disk. first, the ir free-free continuum is formed in the wind and will give a direct measure of the density structure of the ionized gas regions. second, ir line profiles provides a measure for the ion density as a function of velocity. third, the dust continuum determines the physical properties of the disk at large distance from the star. fourth, the presence or absence of co emission gives constraints on the density of the cold dust disk. we will model the observed spectra with a non-lte radiative transfer code for non-spherical geometries that is now being written by t. lanz.
Instrument
SWS01 , SWS06
Temporal Coverage
1997-03-20T20:06:59Z/1997-10-19T05:06:20Z
Version
1.0
Mission Description
The Infrared Space Observatory (ISO) was the worlds first true orbiting infrared observatory. Equipped with four highly-sophisticated and versatile scientific instruments, it was launched by Ariane in November 1995 and provided astronomers world-wide with a facility of unprecedented sensitivity and capabilities for a detailed exploration of the Universe at infrared wavelengths.
