Imaging Long-Period RV Companions to Exoplanet Host Stars

Details Imaging Long-Period RV Companions to Exoplanet Host Stars Imaging Long-Period RV Companions to Exoplanet Host Stars

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008noao.prop..335c&link_type=abstract

NOAO Proposal ID #2008A-0335

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Scientific paper

We propose to use angular differential imaging with AO to search for faint stellar or substellar companions around a number of exoplanet host stars that display a long-term trend in their radial velocity residuals, indicative of a hitherto undetected outer companion. Our targets are selected from a careful analysis of velocity data from the California-Carnegie team for over 120 systems. For those stars with a linear trend, we can determine the minimum angular separation and minimum mass of the putative outer companion. We have thus compiled a unique target list with a high probability of imaging the unseen companions with the ADI technique. Discovering new stellar or substellar companions in the known exoplanetary sample will contribute to our knowledge of stellar multiplicity among exoplanet hosts, and our understanding of planet and brown dwarf characteristics in both single and multiple exoplanetary systems.

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