Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer

Details Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer Scientific Results from High-precision Astrometry at the Palomar Testbed Interferometer

2006-05-31

arxiv.org/abs/astro-ph/0605736v1

SPIE 2006 6268-16

Astronomy and Astrophysics

Astrophysics

8 Pages

Scientific paper

10.1117/12.670688

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.

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