Cross Dispersion Imaging of Hot + Cool Binaries

Details Cross Dispersion Imaging of Hot + Cool Binaries Cross Dispersion Imaging of Hot + Cool Binaries

Jul 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991hst..prop.2680m&link_type=abstract

HST Proposal ID #2680

Physics

Hst Proposal Id #2680

Scientific paper

We propose to evaluate an observing strategy which could accurately measure separations ~ 10E-3" for binaries with evolved F-M primaries and main sequence B or A secondaries. These include binaries whose primaries are Cepheid variables and supernova progenitors. When combined with spectroscopic orbits, the spatial information will enable the masses and distances to such stars to be determined from Newton's laws and Euclidean geometry. Determining distances for the Cepheids in this way amounts bypassing two rungs of the cosmic distance ladder. For the Non-variable evolved stars, the mass determinations will provide sorely needed information on the poorly understood mass loss processes which occur in the latter stages of the evolution of massive stars.

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