Revised Stellar Properties of Kepler Targets for the Q1-17 (DR25) Transit Detection Run

Savita Mathur, Daniel Huber, Natalie M. Batalha, David R. Ciardi, Fabienne A. Bastien, Allyson Bieryla, Lars A. Buchhave, William D. Cochran, Michael Endl, Gilbert A. Esquerdo, Elise Furlan, Andrew Howard, Steve B. Howell, Howard Isaacson, David W. Latham, Phillip J. Macqueen, David R. Silva

Research output: Contribution to journalArticlepeer-review

221 Scopus citations


The determination of exoplanet properties and occurrence rates using Kepler data critically depends on our knowledge of the fundamental properties (such as temperature, radius, and mass) of the observed stars. We present revised stellar properties for 197,096 Kepler targets observed between Quarters 1-17 (Q1-17), which were used for the final transiting planet search run by the Kepler Mission (Data Release 25, DR25). Similar to the Q1-16 catalog by Huber et al., the classifications are based on conditioning published atmospheric parameters on a grid of Dartmouth isochrones, with significant improvements in the adopted method and over 29,000 new sources for temperatures, surface gravities, or metallicities. In addition to fundamental stellar properties, the new catalog also includes distances and extinctions, and we provide posterior samples for each stellar parameter of each star. Typical uncertainties are ∼27% in radius, ∼17% in mass, and ∼51% in density, which is somewhat smaller than previous catalogs because of the larger number of improved constraints and the inclusion of isochrone weighting when deriving stellar posterior distributions. On average, the catalog includes a significantly larger number of evolved solar-type stars, with an increase of 43.5% in the number of subgiants. We discuss the overall changes of radii and masses of Kepler targets as a function of spectral type, with a particular focus on exoplanet host stars.

Original languageEnglish (US)
Article number30
JournalAstrophysical Journal, Supplement Series
Issue number2
StatePublished - Apr 2017

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science


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