Single and Double Star Astrometry with the Mark III Interferometer

Hummel, C. A.

doi:10.1007/978-94-011-0069-4_4

C. A. Hummel³

Part of the book series: International Astronomical Union / Union Astronomique Internationale ((IAUS,volume 166))

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Abstract

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.

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Authors and Affiliations

NRL/USNO Optical Interferometer Project, U.S. Naval Observatory — AD 5, Universities Space Research Association, 3450 Massachusetts Av. NW, Washington, DC, 20392, USA
C. A. Hummel

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C. A. Hummel
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Editors and Affiliations

Copenhagen University Observatory, Copenhagen, Denmark
Erik Høg
U.S. Naval Observatory, Washington, DC, USA
P. Kenneth Seidelmann

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Hummel, C.A. (1995). Single and Double Star Astrometry with the Mark III Interferometer. In: Høg, E., Seidelmann, P.K. (eds) Astronomical and Astrophysical Objectives of Sub-Milliarcsecond Optical Astrometry. International Astronomical Union / Union Astronomique Internationale, vol 166. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-0069-4_4

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DOI: https://doi.org/10.1007/978-94-011-0069-4_4
Publisher Name: Springer, Dordrecht
Print ISBN: 978-0-7923-3443-9
Online ISBN: 978-94-011-0069-4
eBook Packages: Springer Book Archive

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