Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer
arXiv:astro-ph/0605736 · doi:10.1117/12.670688
Abstract
A new observing mode for the Palomar Testbed Interferometer was developed in2002-2003 which enables differential astrometry at the level of 20 micro-arcseconds for binary systems with separations of several hundred milli-arcseconds (mas). This phase-referenced mode is the basis of the Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES), a search for giant planets orbiting either the primary or secondary star in fifty binary systems. We present the first science results from the PHASES search. The properties of the stars comprising binary systems are determined to high precision. The mutual inclinations of several hierarchical triple star systems have been determined. We will present upper limits constraining the the existence of giant planets in a few of the target systems.
arXiv comment8 Pages
References in corpus (4)
- A purely geometric distance to the binary star Atlas, a member of the Pleiades
- Planet formation is unlikely in equal mass binary systems with a ~ 50 AU
- Multi-order TODCOR: application to observations taken with the CORALIE echelle spectrograph
- PHASES Differential Astrometry and Iodine Cell Radial Velocities of the kappa Pegasi Triple Star System