Know the Star, Know the Planet. II. Speckle Interferometry of Exoplanet Host Stars

Abstract

A study of the host stars to exoplanets is important to understanding their environment. To that end, we report new speckle observations of a sample of exoplanet host primaries. The bright exoplanet host HD 8673 (= HIP 6702) is revealed to have a companion, although at this time we cannot definitively establish the companion as physical or optical. The observing lists for planet searches and for these observations have for the most part been pre-screened for known duplicity, so the detected binary fraction is lower than what would otherwise be expected. Therefore, a large number of double stars were observed contemporaneously for verification and quality control purposes, to ensure the lack of detection of companions for exoplanet hosts was valid. In these additional observations, ten pairs are resolved for the first time and sixty pairs are confirmed. These observations were obtained with the USNO speckle camera on the NOAO 4m telescopes at both KPNO and CTIO from 2001 to 2010.

2 figures, 3 tables

References in corpus (4)

• The High Angular Resolution Multiplicity of Massive Stars
• Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems
• Know the Star, Know the Planet. I. Adaptive Optics of Exoplanet Host Stars
• Cool Subdwarf Investigations II: Multiplicity

Cited by in corpus (19)

• Stellar companions to exoplanet host stars: Lucky Imaging of transiting planet hosts
• WASP-12b and HAT-P-8b are Members of Triple Star Systems
• Three Super-Earths Orbiting HD 7924
• Know the Star, Know the Planet. I. Adaptive Optics of Exoplanet Host Stars
• Dancing twins: stellar hierarchies that formed sequentially?
• Gaia DR2 distances to Collinder 419 and NGC 2264 and new astrometric orbits for HD 193 322 Aa,Ab and 15 Mon Aa,Ab
• Know The Star, Know the Planet. IV. A Stellar Companion to the Host star of the Eccentric Exoplanet HD 8673b
• Speckle Interferometry of Red Dwarf Stars
• Know the Star, Know the Planet. III. Discovery of Late-Type Companions to Two Exoplanet Host Stars
• MagAO Imaging of Long-period Objects (MILO). I. A Benchmark M Dwarf Companion Exciting a Massive Planet around the Sun-like Star HD 7449
• Surveying the Bright Stars by Optical Interferometry III: A Magnitude-Limited Multiplicity Survey of Classical Be-Stars
• Physical and Geometrical Parameters of CVBS XI: COU1511 (HIP12552)
• Orbits of Five Triple Stars
• Orbital and physical parameters of the close binary system: GJ 9830 (HIP 116259)
• Angular Diameters and Fundamental Parameters of Forty-Four Stars from the Navy Precision Optical Interferometer
• Asteroseismic and orbital analysis of the triple star system HD 188753 observed by Kepler
• Multiplicity of stars with planets in the solar neighbourhood
• A Six-Planet System Around the Star HD 34445
• Vintage NPOI: New and Updated Angular Diameters for 145 Stars