The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
The California-Kepler Survey. II. Precise Physical Properties of 2025 Kepler Planets and Their Host Stars
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DOI：
10.3847/1538-3881/aa80e7
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发表时间：
2017-03
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影响因子：
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通讯作者：
J. Johnson;E. Petigura;B. Fulton;G. Marcy;A. Howard;H. Isaacson;L. Hebb;P. Cargile;T. Morton;L. Weiss;J. Winn;L. Rogers;E. Sinukoff;L. Hirsch
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文献类型：
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作者：
J. Johnson;E. Petigura;B. Fulton;G. Marcy;A. Howard;H. Isaacson;L. Hebb;P. Cargile;T. Morton;L. Weiss;J. Winn;L. Rogers;E. Sinukoff;L. Hirsch
我们展示了 1305 个开普勒感兴趣天体的恒星和行星属性，这些天体是加州-开普勒巡天观测到的 2025 个候选行星的一部分。我们将论文 I 中提出的光谱约束与恒星内部模型相结合来估计恒星质量、半径和年龄。恒星半径通常限制为 11%，而仅使用光度约束时为 40%。恒星质量限制为 4%，年龄限制为 30%。我们通过与星震研究和盖亚视差的比较来验证恒星参数的完整性。我们还重新计算 2025 年候选行星的行星半径。由于行星半径的知识通常受到恒星大小不确定性的限制，因此我们将行星半径的不确定性从通常的 42% 提高到 12%。我们还利用改进的恒星有效温度知识来重新计算行星的入射恒星通量，现在精确到 21%，而从光度测量得出的结果为两倍。
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.