Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984spie..445..484v&link_type=abstract
IN: Instrumentation in astronomy V; Proceedings of the Fifth Meeting, London, England, September 7-9, 1983 (A85-25360 10-89). Be
Astronomy and Astrophysics
Astronomy
2
Differential Interferometry, High Resolution, Polarimetry, Speckle Patterns, Stellar Spectrophotometry, Linear Polarization, Magnetic Stars, Microprocessors, Polarized Light, Rayleigh Scattering, Very Long Base Interferometry, Zeeman Effect
Scientific paper
A description is given in this paper of the auxiliary optics developed for high angular observations in polarized light. These optics and their related data processing system - based on microprocessors - are implemented on the stellar interferometers at CERGA. The observational program concerns the detection of Rayleigh scattering in circumstellar envelopes around single and binary stars. It is also planned to observe magnetic stars with the 1.5 meter aperture interferometer when it will be operational. A simple geometrical model for a stellar magnetic field is considered and it is shown how the visibility functions of the star should change in transverse and longitudinal components of a Zeeman pattern. Feasibility and the requirements on sensitivity are discussed.
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