Abstract

Debris disks are an important component of planetary systems and excellent tracers of planet formation and evolution. In an effort to discover habitable planets through debris disks, we examined the 47 Kepler Objects of Interest (KOI) host star candidates published previously by Thompson et al 2018 as well as 51 candidates published in Sobrinho et al 2018. We analyzed the spectral energy distribution (SED) of the KOIs in the UV, optical, and IR wavelengths and searched for IR excesses in the SEDs. Because the photometric data provided by WISE was not detailed enough to include error bars of the W4 value, we went back to source data and performed square aperture, moffat fitting, and PSF fitting to calculate more reliable WISE flux measurements in our SED fits. The photometry data include data from GALEX, GAIA, SDSS, 2MASS, and WISE surveys. Using the excess significance formula, we found that out of the KOIs from both studies, seven from Thompson’s paper and 21 from Sobrinho’s paper had excess significance parameter above two, indicating significant IR excess. In order to ensure that companion flux in IR bands did not contribute to the observed flux, we performed PSF fitting on images of targets and bright companions within 6 arcseconds.