The Search for Stellar Companions to Exoplanet Host Stars Using the CHARA Array
arXiv:0803.4131 · doi:10.1086/588653
Abstract
Most exoplanets have been discovered via radial velocity studies, which are inherently insensitive to orbital inclination. Interferometric observations will show evidence of a stellar companion if it sufficiently bright, regardless of the inclination. Using the CHARA Array, we observed 22 exoplanet host stars to search for stellar companions in low-inclination orbits that may be masquerading as planetary systems. While no definitive stellar companions were discovered, it was possible to rule out certain secondary spectral types for each exoplanet system observed by studying the errors in the diameter fit to calibrated visibilities and by searching for separated fringe packets.
26 pages, 5 tables, 8 figures
References in corpus (16)
- Catalog of Nearby Exoplanets
- The Discovery of a Planetary Companion to 16 Cygni B
- First Results from the CHARA Array. II. A Description of the Instrument
- The CORALIE survey for southern extra-solar planets. XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE
- Hot Jupiters in binary star systems
- Six New Planets from the Keck Precision Velocity Survey
- A Planet at 5 AU Around 55 Cancri
- First Results from the CHARA Array. I. An Interferometric and Spectroscopic Study of the Fast Rotator alpha Leonis (Regulus)
- A Planet Orbiting the Star Rho Coronae Borealis
- Planetary Companions Around Two Solar Type Stars: HD 195019 and HD 217107
- Sub-Saturn Planet Candidates to HD 16141 and HD 46375
- The ELODIE survey for northern extra--solar planets I. 6 new extra--solar planet candidates
- The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A
- An Upper Bound on the Flux Ratio of rho CrB's Companion at 1.6um
- A Distant Stellar Companion in the Upsilon Andromedae System
- Formation of Protoplanets from Massive Planetesimals in Binary Systems
Cited by in corpus (11)
- A Survey of Stellar Families: Multiplicity of Solar-Type Stars
- A new implementation of the infrared flux method using the 2MASS catalogue
- Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars
- Stellar Diameters and Temperatures V. Eleven Newly Characterized Exoplanet Host Stars
- The GJ 436 System: Directly Determined Astrophysical Parameters of an M-Dwarf and Implications for the Transiting Hot Neptune
- Empirical metallicity-dependent calibrations of effective temperature against colours for dwarfs and giants based on interferometric data
- The Mass of HD 38529 c from Hubble Space Telescope Astrometry and High-Precision Radial Velocities
- Facing the problems on the determination of stellar temperatures and gravities: Galactic globular clusters
- Ruling Out Possible Secondary Stars to Exoplanet Host Stars Using the CHARA Array
- Precise radial velocities of giant stars IX. HD 59686 Ab: a massive circumstellar planet orbiting a giant star in a ~13.6 au eccentric binary system
- Know the Star, Know the Planet. V. Characterization of the Stellar Companion to the Exoplanet Host HD 177830