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- W2071036721 abstract "A method of wavelength calibration is proposed which may enable measuring changes in radial velocity of bright solar-type stars to an accuracy of about 5 meters per second. Such accuracy would be sufficient for detecting Jupiter-like planets around these stars. The stellar spectrum is imaged by a slitless echelle spectrograph onto a 100-channel Digicon image tube. Instrumental profiles of Digicon diodes are narrowed down by a Fabry-Perot etalon, making the profiles less dependent on atmospheric seeing. The spectrograph and the etalon act merely as a series of narrow band filters for the individual diodes; effective wavelengths of these “filters” are monitored by a crystal retarder (phase retardation plate) kept at a constant temperature. For artificially linearly polarized stellar light which passes through this retarder and through a quarter-wave plate, the plane of polarization varies rapidly with wavelength. The precisely measured position angle of polarization provides wavelength calibration for every resolution element in the spectrum." @default.
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- W2071036721 date "1976-01-01" @default.
- W2071036721 modified "2023-09-26" @default.
- W2071036721 title "Feasibility of a search for planets around solar-type stars with a polarimetric radial velocity meter" @default.
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- W2071036721 doi "https://doi.org/10.1016/0019-1035(76)90181-0" @default.
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