The Gaia–Kepler Stellar Properties Catalog. I. Homogeneous Fundamental Properties for 186,301 Kepler Stars

Abstract

An accurate and precise Kepler Stellar Properties Catalog is essential for the interpretation of the Kepler exoplanet survey results. Previous Kepler Stellar Properties Catalogs have focused on reporting the best-available parameters for each star, but this has required combining data from a variety of heterogeneous sources. We present the Gaia–Kepler Stellar Properties Catalog, a set of stellar properties of 186,301 Kepler stars, homogeneously derived from isochrones and broadband photometry, Gaia Data Release 2 parallaxes, and spectroscopic metallicities, where available. Our photometric effective temperatures, derived from colors, are calibrated on stars with interferometric angular diameters. Median catalog uncertainties are 112 K for , 0.05 dex for , 4% for , 7% for , 13% for , 10% for , and 56% for stellar age. These precise constraints on stellar properties for this sample of stars will allow unprecedented investigations into trends in stellar and exoplanet properties as a function of stellar mass and age. In addition, our homogeneous parameter determinations will permit more accurate calculations of planet occurrence and trends with stellar properties.

SpiKeS: Precision Warm Spitzer Photometry of the Kepler Field

“…Using the distances derived from Gaia by Bailer-Jones et al (2018) we have determined absolute magnitudes for our SpiKeS sources and have plotted them in Figure 10. This infrared HR diagram is very similar to the optical HR diagram of Kepler stars derived by Berger et al (2020). The main parts of the HR diagram are clearly distinguishable: the main sequence, the red giant branch, the asymptotic giant branch, and the red giant clump.…”

“…However, the principal interest of the SpiKeS team, as illustrated below, was to search for infrared excesses that could in principle be due either to circumstellar dust or to cool companions of the Kepler stars. In addition, precise spectral energy distribution (SED) fitting of the SpiKeS and other data, combined with distances measured by Gaia (Gaia Collaboration et al 2016, as has been done by Berger et al (2020), can lead to improved estimates of the radii of exoplanet host stars, which, in combination with the measured transit depths, can also yield the best possible determinations of exoplanet radii.…”

Scaling K2. III. Comparable Planet Occurrence in the FGK Samples of Campaign 5 and Kepler

“…This finding is not surprising as both catalogs used Gaia DR2 to infer their radius parameters. However, the additional photometry data used by both Berger et al (2020b) and Hardegree-Ullman et al (2020) to infer stellar parameters provides increased accuracy when compared to the Gaia team measurements. Therefore, we use our original K2 and Kepler catalog values while acknowledging their minor systematic offsets.…”

Two Planets Straddling the Habitable Zone of the Nearby K Dwarf Gl 414A

“…Since SpecMatch-Emp does not return a stellar mass, we used the isoclassify package (Berger et al 2020;Huber et al 2017) to place the star onto MESA Isochrones & Stellar Tracks (MIST; Choi et al 2016;Dotter 2016) isochrone tracks. We followed the methodology of to derive physical stellar parameters from the spectroscopic parameters.…”

“…Software: SpecMatch-Emp (Yee et al 2017), isoclassify (Berger et al 2020;Huber et al 2017), MIST (Dotter 2016;Choi et al 2016), MINESweeper (Cargile et al 2020), ATLAS12 (Kurucz 1970), SYNTHE (Kurucz 1993), dynesty (Speagle 2019), RadVel (v1.2.13;, emcee (Foreman-Mackey et al 2013), Forecaster (Chen & Kipping 2017), REBOUND (Rein & Liu 2012;Rein & Tamayo 2015), Astropy (Astropy…”