Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2350...33c&link_type=abstract
In NASA. Ames Research Center Proc. of the Workshop on Improvements to Photometry p 33-42 (SEE N85-17892 08-89)
Astronomy and Astrophysics
Astronomy
Astronomical Spectroscopy, Binary Stars, Fabry-Perot Spectrometers, Radial Velocity, Stellar Spectra, Absorption Spectra, Calibrating, Data Processing, Doppler Effect, Planetary Systems, Planets, Precision, Prototypes, Seismology, Stellar Oscillations, Variations
Scientific paper
A prototype instrument for measurement of stellar radial velocity variations to a precision of a few meters per second is discussed. The instrument will be used to study low amplitude stellar non-radial oscillations, to search for binary systems with large mass ratios, and ultimately to search for extrasolar planetary systems. The instrument uses a stable Fabry-Perot etalon, in reflection, to impose a set of fixed reference absorption lines on the stellar spectrum before it enters the coude spectrograph of the McDonald Observatory 2.7-m telescope. The spectrum is recorded on the Octicon detector, which consists of eight Reticon arrays placed end to end. Radial velocity variations of the star are detected by measuring the shift of the stellar lines with respect the artificial Fabry-Perot lines, and correcting for the known motions in the solar system.
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