The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
By J. Johnson, E. Petigura, B. Fulton, G. Marcy, Andrew W. Howard, H. Isaacson, L. Hebb, Phillip Cargile, Timothy Morton, L. Weiss and 4 more. 2017
155 citations recorded by the source corpus.
We present stellar and planetary properties for 1305 Kepler Objects of Interest hosting 2025 planet candidates observed as part of the California-Kepler Survey. We combine spectroscopic constraints, presented in Paper I, with stellar interior modeling to estimate stellar masses, radii, and ages. Stellar radii are typically constrained to 11%, compared to 40% when only photometric constraints are used. Stellar masses are constrained to 4%, and ages are constrained to 30%. We verify the integrity of the stellar parameters through comparisons with asteroseismic studies and Gaia parallaxes. We also recompute planetary radii for 2025 planet candidates. Because knowledge of planetary radii is often limited by uncertainties in stellar size, we improve the uncertainties in planet radii from typically 42% to 12%. We also leverage improved knowledge of stellar effective temperature to recompute incident stellar fluxes for the planets, now precise to 21%, compared to a factor of two when derived from photometry.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/1decc80edabafc2a89f6720b9ff7e2a793ab1fe7
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Citations in the corpus
- The Evaporation Valley in the Kepler Planets (2017, methodology): “Recently, the California-Kepler Survey (CKS), using spectroscopic follow-up of a large (1305) sample of planet hosting Kepler stars (Petigura et al. 2017) refined the planet parameters for 2025 Kepler planets, and reduced the typical planetary radius error to ∼ 10% (Johnson et al. 2017).”
- Atmospheric Escape and the Evolution of Close-In Exoplanets (2018, methodology): “The California-Kepler-Survey used spectroscopic follow-up of exoplanet host stars to reduce the uncertainty in the stellar radius and associated planetary radii (Petigura et al. 2017; Johnson et al. 2017) to ∼ 10%.”
- Revised Radii of Kepler Stars and Planets Using Gaia Data Release 2 (2018, methodology): “…important results for our understanding of exoplanets, such as the discovery of a gap in the distribution of small planets by the California-Kepler Survey (CKS, Fulton et al. 2017; Petigura et al. 2017; Johnson et al. 2017) and evidence for a dearth of hot super-Earths (Lundkvist et al. 2016).”
- Core-powered mass-loss and the radius distribution of small exoplanets (2017, methodology): “E-mail: sivan.ginzburg@mail.huji.ac.il Recently, refined radius measurements by the California-Kepler Survey (Johnson et al. 2017; Petigura et al. 2017) allowed Fulton et al. (2017) to identify a distinct valley in the radius distribution of short-period planets.”
- The California-Kepler Survey. III. A Gap in the Radius Distribution of Small Planets (2017, methodology): “Here, we examine a sample of planets orbiting stars with precisely measured radii from the California-Kepler Survey (CKS; see Petigura et al. (2017) and Johnson et al. (2017)).”
- An asteroseismic view of the radius valley: stripped cores, not born rocky (2017, unknown): “Recently, Fulton et al. (2017) provided clear evidence of the valley by using a spectroscopic sample from the CaliforniaKepler Survey (CKS), with better-constrained stellar parameters (Petigura et al. 2017; Johnson et al. 2017).”
- The California-Kepler Survey. V. Peas in a Pod: Planets in a Kepler Multi-planet System Are Similar in Size and Regularly Spaced (2017, methodology): “The uncertainties inherent in broad passband stellar characterization resulted in uncertainties of 16% in the stellar masses and 42% in the stellar radii, on average (Mullally et al. 2015; Johnson et al. 2017).”