Astrometry and Photometry of Binary Exoplanet Host Stars

Details Astrometry and Photometry of Binary Exoplanet Host Stars Astrometry and Photometry of Binary Exoplanet Host Stars

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21441122t&link_type=abstract

American Astronomical Society, AAS Meeting #214, #411.22

Physics

Optics

Scientific paper

Using the adaptive optics system on the AEOS 3.6m telescope, we conducted an astrometry survey of stars hosting exo-planets discovered by radial velocity studies. The data were collected in I-band and multiple frames were collected and co-added to produce images capable of revealing faint stellar companions. The survey was intended to detect both optical and physical companions. Duplicity among exoplanet host stars can influence the planetary orbits. A census of faint background stars is important for coronagraphic imaging surveys, as it eliminates the possibility of mistagging a background star as a possible planetary companion. We present astrometry and photometry on 7 previously known binaries and for 8 newly detected companions. An additional 46 stars were observed with no signs of companions, We also present orbits for two of the previously known binaries: HIP 14954 (HD 19994 = HJ 663) and HIP 67275 (HD 120136 = STT 270).

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