Multiplicity-Study of Exoplanet Host Stars

Details Multiplicity-Study of Exoplanet Host Stars Multiplicity-Study of Exoplanet Host Stars

2005-12-05

arxiv.org/abs/astro-ph/0512105v1

Astronomy and Astrophysics

Astrophysics

3 pages, 1 figure

Scientific paper

We carry out a systematic search campaign for wide companions of exoplanet host stars to study their multiplicity and its influence on the long-term stability and the orbital parameters of the exoplanets. We have already found 6 wide companions, raising the number of confirmed binaries among the exoplanet host stars to 20 systems. We have also searched for wide companions of Gl86, the first known exoplanet host star with a white dwarf companion. Our Sofi/NTT observations are sensitive to substellar companions with a minimum-mass of 35 Mjup and clearly rule out further stellar companions with projected separations between 40 and 670AU.

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