A revised effective temperature scale for the kepler input catalog
Marc H. Pinsonneault,Deokkeun An,Joanna Molenda-Żakowicz,William J. Chaplin,Travis S. Metcalfe,Hans Bruntt +5 more
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In this paper, a catalog of revised effective temperatures for stars observed in long-cadence mode in the Kepler Input Catalog (KIC) is presented, along with correction terms for surface gravity effects, metallicity, and statistical corrections for binary companions or blending.Abstract:
We present a catalog of revised effective temperatures for stars observed in long-cadence mode in the Kepler Input Catalog (KIC). We use Sloan Digital Sky Survey (SDSS) griz filters tied to the fundamental temperature scale. Polynomials for griz color-temperature relations are presented, along with correction terms for surface gravity effects, metallicity, and statistical corrections for binary companions or blending. We compare our temperature scale to the published infrared flux method (IRFM) scale for VTJKs in both open clusters and the Kepler fields. We find good agreement overall, with some deviations between (J ? Ks )-based temperatures from the IRFM and both SDSS filter and other diagnostic IRFM color-temperature relationships above 6000?K. For field dwarfs, we find a mean shift toward hotter temperatures relative to the KIC, of order 215?K, in the regime where the IRFM scale is well defined (4000?K to 6500?K). This change is of comparable magnitude in both color systems and in spectroscopy for stars with T eff below 6000?K. Systematic differences between temperature estimators appear for hotter stars, and we define corrections to put the SDSS temperatures on the IRFM scale for them. When the theoretical dependence on gravity is accounted for, we find a similar temperature scale offset between the fundamental and KIC scales for giants. We demonstrate that statistical corrections to color-based temperatures from binaries are significant. Typical errors, mostly from uncertainties in extinction, are of order 100?K. Implications for other applications of the KIC are discussed.read more
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Planetary Candidates Observed by Kepler. III. Analysis of the First 16 Months of Data
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