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Single and Double Star Astrometry with the Mark III Interferometer

Published online by Cambridge University Press:  07 August 2017

C.A. Hummel III
C.A. Hummel III*
Affiliation:
Universities Space Research Association NRL/USNO Optical Interferometer Project c/o U.S. Naval Observatory - AD 5 3450 Massachusetts Av. NW, Washington, DC 20392, USA

Abstract

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Present construction of large multi-element optical interferometers is based on experience with several pioneering instruments, a very successful one being the Mark III interferometer on Mt. Wilson, California. With it, over the last few years, some 26 spectroscopic binaries were resolved at separations as small as 3 milliarcseconds (mas) and orbital elements have been derived. In addition, the installation of vacuum delay-lines and multi-color fringe-detection allowed the derivation of dispersion-corrected geometrical delays of stars, which were used to determine relative stellar positions over wide angles with a precision of about 20 mas. We present and discuss recent results with respect to the determination of stellar positions, distances, masses, and luminosities.

Type
1. Current Advances in Astrometry
Information
Symposium - International Astronomical Union , Volume 166: Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry , 1995 , pp. 19 - 22
Copyright
Copyright © Kluwer 1995 

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