Interferometric measurements of stellar positions in the infrared

Details Interferometric measurements of stellar positions in the infrared Interferometric measurements of stellar positions in the infrared

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110..324s&link_type=abstract

Astronomy and Astrophysics, vol. 110, no. 2, June 1982, p. 324-331.

Astronomy and Astrophysics

Astrophysics

6

Astrometry, Binary Stars, Infrared Interferometers, Interferometry, Stellar Parallax, Variable Stars, Atmospheric Attenuation, Atmospheric Turbulence, Optical Heterodyning, Optical Measurement, Stellar Spectra

Scientific paper

Differential positional measurements have been made at wavelengths near 11 microns on stellar sources using an interferometric technique. The nightly precision of these measurements is approximately 0.08, which is slightly better than the typical astrometric errors obtained at visible wavelengths using photographic zenith tubes. The present interferometric measurements are thought to be dominated by instrumental errors, indicating that a significant improvement is possible in the precision of astrometric measurements. The limitation imposed by long term irregularities in the earth's atmosphere is estimated to be on the order of 0.01 arcsec.

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