Optical observations of close binaries with the Mark III Stellar Interferometer

Xiaopei Pan; Michael Shao; M. Mark Colavita; J. Thomas Armstrong; David Mozurkewich; Richard S. Simon; C. Denisson; Maddali Vivekanand; Kenneth J. Johnston

doi:10.1117/12.19303

1 August 1990 Optical observations of close binaries with the Mark III Stellar Interferometer

Xiaopei Pan, Michael Shao, M. Mark Colavita, J. Thomas Armstrong, David Mozurkewich, Richard S. Simon, C. Denisson, Maddali Vivekanand, Kenneth J. Johnston

Author Affiliations +

Proceedings Volume 1237, Amplitude and Intensity Spatial Interferometry; (1990) https://doi.org/10.1117/12.19303
Event: SPIE Astronomical Telescopes and Instrumentation for the 21st Century, 1990, Tucson, AZ, United States

Abstract

For the first time, four spectroscopic binaries have been directly resolved with the Mark III Stellar Interferometer. Observations in 1988 and 1989 were analyzed, and visual orbits for four binaries have been determined. The semimajor axes for Beta Tri, Alpha Equ, Alpha And and Beta Ari are approximately 0.008 arcsec, 0.012 arcsec, 0.024 arcsec and 0.037 arcsec, respectively. The magnitude differences between two components are 0.5, 0.7, 1.8 and 2.6 mag, respectively. All of the orbital elements for Alpha And and Beta Ari were determined from interferometric data only, and agree well with spectroscopic observations. Predictions of relative position between the two components for these binaries are consistent with the measurements to less than 0.001 arcsec. Combined with data from spectroscopy, masses and distance for the double-lined spectroscopic binary Beta Ari are derived, and the results indicate that both components of Beta Ari agree well with the empirical mass-luminosity relation.

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Xiaopei Pan, Michael Shao, M. Mark Colavita, J. Thomas Armstrong, David Mozurkewich, Richard S. Simon, C. Denisson, Maddali Vivekanand, and Kenneth J. Johnston "Optical observations of close binaries with the Mark III Stellar Interferometer", Proc. SPIE 1237, Amplitude and Intensity Spatial Interferometry, (1 August 1990); https://doi.org/10.1117/12.19303

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