J/AJ/155/48 California-Kepler Survey (CKS). V. Masses and radii (Weiss+, 2018)
The California-Kepler survey.
V. Peas in a pod: planets in a Kepler multi-planet system are similar in size
and regularly spaced.
Weiss L.M., Marcy G.W., Petigura E.A., Fulton B.J., Howard A.W., Winn J.N.,
Isaacson H.T., Morton T.D., Hirsch L.A., Sinukoff E.J., Cumming A., Hebb L.,
Cargile P.A.
<Astron. J., 155, 48 (2018)>
=2018AJ....155...48W 2018AJ....155...48W (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets ; Stars, masses ; Stars, diameters ; Surveys
Keywords: catalogs - planetary systems - stars: fundamental parameters - surveys
Abstract:
We have established precise planet radii, semimajor axes, incident
stellar fluxes, and stellar masses for 909 planets in 355 multi-planet
systems discovered by Kepler. In this sample, we find that planets
within a single multi-planet system have correlated sizes: each planet
is more likely to be the size of its neighbor than a size drawn at
random from the distribution of observed planet sizes. In systems with
three or more planets, the planets tend to have a regular spacing: the
orbital period ratios of adjacent pairs of planets are correlated.
Furthermore, the orbital period ratios are smaller in systems with
smaller planets, suggesting that the patterns in planet sizes and
spacing are linked through formation and/or subsequent orbital dynamics.
Yet, we find that essentially no planets have orbital period ratios
smaller than 1.2, regardless of planet size. Using empirical mass-radius
relationships, we estimate the mutual Hill separations of planet pairs.
We find that 93% of the planet pairs are at least 10 mutual Hill radii
apart, and that a spacing of ∼20 mutual Hill radii is most common. We
also find that when comparing planet sizes, the outer planet is larger
in 65%±0.4% of cases, and the typical ratio of the outer to inner
planet size is positively correlated with the temperature difference
between the planets. This could be the result of photo-evaporation.
Description:
With the goal of clarifying the stellar and planetary properties of
Kepler's multi-planet systems, the California-Kepler Survey (CKS)
determined precise stellar and planetary properties for 355 Kepler
multi-planet systems containing 909 transiting planets.
The initial set of CKS systems with multiple transiting planet
candidates consists of 469 stars with at least two transit-like
signals and a total of 1215 transit-like signals that were at one time
flagged as Kepler Objects of Interest (KOIs). After several cuts, our
sample of "CKS multis" contained 909 high-purity planet candidates,
which we henceforth call planets, in 355 multi-planet systems.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 175 909 CKS Multis Properties
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/197/8 : Kepler's candidate multiple transiting planets
(Lissauer+, 2011)
J/ApJ/763/41 : Kepler multiple-candidate systems radii (Ciardi+, 2013)
J/ApJ/783/4 : Properties of Kepler multi-planet candidate systems
(Wang+, 2014)
J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)
J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)
J/AJ/154/107 : California-Kepler Survey (CKS). I. 1305 stars (Petigura+, 2017)
J/AJ/154/108 : California-Kepler Survey (CKS). II. Properties (Johnson+, 2017)
J/AJ/154/109 : California-Kepler Survey (CKS). III. Planet radii
(Fulton+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- KOI-S Kepler Object of Interest number of star
(KOI -NNNN in Simbad)
8- 15 I8 --- KIC [1718189/12314973] Kepler Input Catalog number
of star (KIC NNNNNNNN in Simbad)
17- 25 A9 --- KOI-P Kepler Object of Interest number of planet
(KOI -NNNN.NN in Simbad)
27- 39 A13 --- Kepler Kepler name of planet, if named (Kepler -NNNNAa
in Simbad)
41- 46 F6.4 Msun M* [0.624/1.4332] Stellar mass
48- 52 F5.3 Msun R* [0.614/3.36] Stellar radius
54- 60 F7.3 --- CDPP [9.986/384.892] The 6-hour Combined Differential
Photometric Precision (CDPP6hr)
62- 67 F6.4 --- b [0.0004/0.8999] Impact parameter
69- 82 F14.9 d Per Orbital period
84- 98 F15.12 Rgeo Rp Planet radius
100-114 F15.13 Rgeo e_Rp Uncertainty in Rp
116-129 F14.9 K Teq Equilibrium temperature
131-145 F15.12 Rgeo RpAvg [0/11.3289969329] Average planet radius (1)
147-160 F14.11 --- Pj+1/Pj [0/81.7781148492] Orbital period ratio
Pj+1/Pj (1)
162-175 F14.11 --- Delta [0/82.8903285681] Mutual Hill radius ΔRH
(1)
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Note (1): Of this planet and interior planet.
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History:
From electronic version of the journal
References:
Petigura et al. Paper I. 2017AJ....154..107P 2017AJ....154..107P, Cat. J/AJ/154/107
Johnson et al. Paper II. 2017AJ....154..108J 2017AJ....154..108J, Cat. J/AJ/154/108
Fulton et al. Paper III. 2017AJ....154..109F 2017AJ....154..109F, Cat. J/AJ/154/109
Petigura et al. Paper IV. 2018AJ....155...89P 2018AJ....155...89P, Cat. J/AJ/155/89
Weiss et al. Paper VI. 2018AJ....156..254W 2018AJ....156..254W
Fulton & Petigura. Paper VII 2018AJ....156..264F 2018AJ....156..264F
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 27-Sep-2018