Limits to Tertiary Astrometric Companions in Binary Systems

Details Limits to Tertiary Astrometric Companions in Binary Systems Limits to Tertiary Astrometric Companions in Binary Systems

2006-08-29

arxiv.org/abs/astro-ph/0608640v1

Astrophys.J.653:1469-1479,2006

Astronomy and Astrophysics

Astrophysics

Accepted to ApJ, emulateapj 15 pages

Scientific paper

10.1086/508743

The Palomar High-precision Astrometric Search for Exoplanet Systems (PHASES) has monitored 37 sub-arcsecond binary systems to determine whether their Keplerian orbits are perturbed by faint astrometric companions to either star. Software has been developed to evaluate the regions in a companion mass-period phase space in which the PHASES observations can exclude the possibility of face-on orbit perturbations. We present results for 8 systems for which astrometric companions with masses as small as those of giant planets can be excluded.

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