English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Using the known detection limits for high-resolution imaging observations andthe statistical properties of true binary and line-of-sight companions, weestimate the binary fraction of {\it Kepler} exoplanet host stars. Our speckleimaging programs at the WIYN 3.5-m and Gemini North 8.1-m telescopes haveobserved over 600 {\it Kepler} objects of interest (KOIs) and detected 49stellar companions within $\sim$1 arcsecond. Assuming binary stars follow alog-normal period distribution for an effective temperature range of 3,000 to10,000 K, then the model predicts that the vast majority of detectedsub-arcsecond companions are long period ($P>50$ years), gravitationally boundcompanions. In comparing the model predictions to the number of real detectionsin both observational programs, we conclude that the overall binary fraction ofhost stars is similar to the 40-50\% rate observed for field stars.

Most Sub-Arcsecond Companions of Kepler Exoplanet Candidate Host Stars are Gravitationally Bound