Identifying and Characterizing Infrared Excesses in the Spitzer Kepler Survey (SpiKeS)

August 2024 • 2024ApJ...971..162S

Authors • Skorpen, Sydney O. • Morales, Farisa Y. • Gorjian, Varoujan • Werner, Michael W. • Bryden, Geoffrey

Abstract • We report our search for infrared excesses in the Spitzer/Infrared Array Camera survey of the Kepler field at 3.6 and 4.5 μm. The Spitzer Kepler Survey contains ∼190,000 targets, which we reduce to ∼117,000 targets after applying multiple filters to arrive at a high-quality sample for spectral energy distribution fitting. Of the ∼117,000, we find 11 Sun-like stars (T _eff ∼ 6000 K) with infrared excesses of high significance (>4σ) ranging from 10% to 40% above the photosphere at 4.5 μm, which is characteristic of debris disk systems. Blackbody fits of the infrared excesses for the 11 debris disk candidates suggest dust temperatures of 400─1400 K. None of the candidates have reported exoplanet detections. High-quality 1─5 μm or longer spectra or photometry would be necessary to confirm the candidates as debris disk systems.

Links

• SIMBAD https://simbad.u-strasbg.fr/simbad/sim-ref?querymethod=bib&simbo=on&submit=submit+bibcode&bibcode=2024ApJ...971..162S
• PDF https://iopscience.iop.org/article/10.3847/1538-4357/ad5672/pdf
• DATA https://irsa.ipac.caltech.edu/bibdata/2024/S/2024ApJ...971..162S.html
• ELECTR https://doi.org/10.3847/1538-4357/ad5672