{"about":{"site":"https://codewithpapers.app","non_affiliation":"Code with Papers and Syntology are not affiliated with, endorsed by, or sponsored by Papers with Code, Meta, or the pwc-archive mirror.","licence":"CC BY-SA 4.0","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","attribution":"https://codewithpapers.app/attribution","modified":"archive material modified by Syntology; see the attribution page"},"url":"/paper/revised-radii-of-kepler-stars-and-planets","title":"Revised Radii of Kepler Stars and Planets Using Gaia Data Release 2","arxiv_id":"1805.00231","date":"2018-05-01","proceeding":null,"authors":["Travis A. Berger","Daniel Huber","Eric Gaidos","Jennifer L. van Saders"],"abstract":"One bottleneck for the exploitation of data from the $Kepler$ mission for stellar astrophysics and exoplanet research has been the lack of precise radii and evolutionary states for most of the observed stars. We report revised radii of 177,911 $Kepler$ stars derived by combining parallaxes from $Gaia$ Data Release 2 with the DR25 $Kepler$ Stellar Properties Catalog. The median radius precision is $\\approx$ 8%, a typical improvement by a factor of 4-5 over previous estimates for typical $Kepler$ stars. We find that $\\approx$ 67% ($\\approx$ 120,000) of all $Kepler$ targets are main-sequence stars, $\\approx$ 21% ($\\approx$ 37,000) are subgiants, and $\\approx$ 12% ($\\approx$ 21,000) are red giants, demonstrating that subgiant contamination is less severe than some previous estimates and that Kepler targets are mostly main-sequence stars. Using the revised stellar radii, we recalculate the radii for 2123 confirmed and 1922 candidate exoplanets. We confirm the presence of a gap in the radius distribution of small, close-in planets, but find that the gap is mostly limited to incident fluxes $>$ 200$F_\\oplus$ and its location may be at a slightly larger radius (closer to $\\approx$ 2$R_\\oplus$) when compared to previous results. Further, we find several confirmed exoplanets occupying a previously-described \"hot super-Earth desert\" at high irradiance, show the relation between gas-giant planet radius and incident flux, and establish a bona-fide sample of eight confirmed planets and 30 planet candidates with $R_{\\mathrm{p}}$ $<$ 2$R_\\oplus$ in circumstellar \"habitable zones\" (incident fluxes between 0.25--1.50 $F_\\oplus$). The results presented here demonstrate the potential for transformative characterization of stellar and exoplanet populations using $Gaia$ data.","url_abs":"https://arxiv.org/abs/1805.00231v4","url_pdf":"https://arxiv.org/pdf/1805.00231v4.pdf","source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28","licence_url":"https://creativecommons.org/licenses/by-sa/4.0/legalcode","row_kind":"links_only","authors_date_abstract":"arXiv metadata, CC0 1.0 (https://info.arxiv.org/help/license), from the Kaggle arXiv metadata snapshot of 2026-09-12"},"code_links":[{"paper_slug":"revised-radii-of-kepler-stars-and-planets","repo_url":"https://github.com/danxhuber/evolstate","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null},{"paper_slug":"revised-radii-of-kepler-stars-and-planets","repo_url":"https://github.com/stevepur/falsePositiveTableAnalysis","is_official":0,"mentioned_in_paper":0,"mentioned_in_github":1,"framework":"none","reach":null}],"tasks":[],"methods":[],"datasets_introduced":[],"methods_introduced":[],"results":[],"syntology":{"syntology_url":null,"atlas_url":null,"mcp":null,"developers":"https://syntology.ai/developers"},"arxiv_metadata":null,"syntology_extracted_results":null}