Computer Science
Scientific paper
Jul 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995hst..prop.5952r&link_type=abstract
HST Proposal ID #5952
Computer Science
Hst Proposal Id #5952 Cool Stars
Scientific paper
Antares is the only red supergiant - B star binary where both the red giant wind and the HII region of the B star within the wind can be resolved in the sky, while it is simultaneously possible to determine an accurate mass-loss rate from scattering of B star UV photons in the red giant wind in resonance lines of at least a dozen ions. Earlier attempts using IUE suffered severely from blending of all O eV lines with IS lines. Here we propose to observe 30 selected wavelength regions in the UV, which cover ~ 50 CS lines with the GHRS Echelle of Alpha Sco B with the aim (1) to separate CS P Cyg type lines formed in the wind of Alpha Sco A from IS lines, (2) to determine an accurate M supergiant mass-loss rate by analyzing lines from a dozen ions using the most advanced radiation transfer techniques, (3) to determine a possibly existing depletion pattern in the CS gas phase due to dust condensation, and finally (4) to compare this depletion pattern with that obtained from the IS lines in the same spectrum.
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