The PHASES Differential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary
Solar and Stellar Astrophysics
2015-05-20 v1
Abstract
Differential astrometry measurements from the Palomar High-precision Astrometric Search for Exoplanet Systems have been combined with lower precision single-aperture measurements covering a much longer timespan (from eyepiece measurements, speckle interferometry, and adaptive optics) to determine improved visual orbits for 20 binary stars. In some cases, radial velocity observations exist to constrain the full three-dimensional orbit and determine component masses. The visual orbit of one of these binaries---alpha Com (HD 114378)---shows that the system is likely to have eclipses, despite its very long period of 26 years. The next eclipse is predicted to be within a week of 2015 January 24.
Cite
@article{arxiv.1010.4043,
title = {The PHASES Differential Astrometry Data Archive. II. Updated Binary Star Orbits and a Long Period Eclipsing Binary},
author = {Matthew W. Muterspaugh and William I. Hartkopf and Benjamin F. Lane and J. O'Connell and M. Williamson and S. R. Kulkarni and Maciej Konacki and Bernard F. Burke and M. M. Colavita and M. Shao and Sloane J. Wiktorowicz},
journal= {arXiv preprint arXiv:1010.4043},
year = {2015}
}
Comments
10 pages, Accepted to AJ