The California- Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars

Journal Article · Fri Sep 01 00:00:00 EDT 2017 · Astronomical Journal (Online)

DOI:https://doi.org/10.3847/1538-3881/AA80E7· OSTI ID:22663198

Johnson, John Asher; Cargile, Phillip A.; Sinukoff, Evan ^[1]; Petigura, Erik A.; Howard, Andrew W. ^[2]; Fulton, Benjamin J.; Hirsch, Lea A. ^[3]; Marcy, Geoffrey W.; Isaacson, Howard ^[4]; Hebb, Leslie ^[5]; Morton, Timothy D.; Winn, Joshua N. ^[6]; Weiss, Lauren M. ^[7]

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1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
2. California Institute of Technology, Pasadena, CA, 91125 (United States)
3. Institute for Astronomy, University of Hawai‘i at Mānoa, Honolulu, HI 96822 (United States)
4. Department of Astronomy, University of California, Berkeley, CA 94720 (United States)
5. Hobart and William Smith Colleges, Geneva, NY 14456 (United States)
6. Department of Astrophysical Sciences, Peyton Hall, 4 Ivy Lane, Princeton, NJ 08540 (United States)
7. Institut de Recherche sur les Exoplanètes, Université de Montréal, Montréal, QC (Canada)

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.

• OSTI ID: 22663198
• Journal Information: Astronomical Journal (Online), Vol. 154, Issue 3; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1538-3881
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
CALIFORNIA
COMPARATIVE EVALUATIONS
COMPUTERIZED SIMULATION
LIMITING VALUES
MASS
PHOTOMETRY
PHYSICAL PROPERTIES
PLANETS
SATELLITES
STARS