Hostname: page-component-cd9895bd7-7cvxr Total loading time: 0 Render date: 2024-12-25T16:20:18.688Z Has data issue: false hasContentIssue false

Single and Double Star Astrometry with the Mark III Interferometer

Published online by Cambridge University Press:  07 August 2017

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

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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
Copyright
Copyright © Kluwer 1995 

References

Andersen, J. (1991), Astron. Astrophys. Rev., 3, 91 Google Scholar
Armstrong, J.T., et al. (1992a), Astron. J., 104, 241 Google Scholar
Armstrong, J.T., et al. (1992b), Astron. J., 104, 2217 CrossRefGoogle Scholar
Hummel, C.A., et al. (1993), Astron. J., 106, 2486 Google Scholar
Hummel, C.A., et al. (1994a), Astron. J., 107, 1859 Google Scholar
Hummel, C.A., et al. (1994b), Astron. J., 108, 326 Google Scholar
Pan, X.P., et al. (1990), Astrophys. J., 356, 641 CrossRefGoogle Scholar
Pan, X.P., et al. (1992), Astrophys. J., 384, 624 CrossRefGoogle Scholar
Pan, X.P., et al. (1993), Astrophys. J., 413, L129 CrossRefGoogle Scholar
Shao, M., et al. (1988), Astron. Astrophys., 193, 357 Google Scholar