A Search for Binary Star Companions to the KELT Planet Hosts and a Comparison Sample. I. Results of DSSI Observations
Abstract
We are conducting a search for binary companions around 11 hot-Jupiter hosts from the Kilodegree Extremely Little Telescope (KELT) survey and a large comparison sample of stars shown by KELT to not host a transiting hot Jupiter. The primary stars are bright (7.5 < V < 11) and of similar distance from Earth (100 < d < 300 pc). In this paper, we present the results of our observations using the Differential Speckle Survey Instrument. We observed 9 of the 14 KELT planet hosts that are visible from the northern hemisphere and 51 comparison stars, discovering two new potential companions and re-observing two previously known possible binary systems and one confirmed binary system. We provide an estimate of the chance alignment probability for our observed candidate binaries.
- Publication:
-
The Astronomical Journal
- Pub Date:
- January 2018
- DOI:
- 10.3847/1538-3881/aa9f0e
- Bibcode:
- 2018AJ....155...27C
- Keywords:
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- astrometry;
- binaries: close;
- binaries: general;
- planets and satellites: detection;
- planets and satellites: formation