A High Contrast Imaging Survey of SIM Lite Planet Search Targets
Angelle M. Tanner (Georgia State University), Christopher R. Gelino, (IPAC), Nicholas M. Law (Dunlap Institute)

TL;DR
This survey used high contrast imaging to evaluate nearby stars for potential planet searches, finding mostly no close companions and setting limits on brown dwarf presence, aiding future direct and indirect exoplanet detection efforts.
Contribution
It provides the first high contrast imaging survey of SIM Lite targets, establishing companion occurrence limits and identifying new stellar companions.
Findings
Most targets lack close-in companions.
No brown dwarf companions >40 MJ at 1 arcsecond detected.
Two new stellar companions identified.
Abstract
With the development of extreme high contrast ground-based adaptive optics instruments and space missions aimed at detecting and characterizing Jupiter- and terrestrial-mass planets, it is critical that each target star be thoroughly vetted to determine whether it is a viable target given both the instrumental design and scientific goals of the program. With this in mind, we have conducted a high contrast imaging survey of mature AFGKM stars with the PALAO/PHARO instrument on the Palomar 200 inch telescope. The survey reached sensitivities sufficient to detect brown dwarf companions at separations of > 50 AU. The results of this survey will be utilized both by future direct imaging projects such as GPI, SPHERE and P1640 and indirect detection missions such as SIM Lite. Out of 84 targets, all but one have no close-in (0.45-1") companions and 64 (76%) have no stars at all within the 25"…
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