J/AJ/162/114 Times & durations in Kepler-80 planetary system (Macdonald+, 2021)
A five-planet resonant chain: reevaluation of the Kepler-80 system.
Macdonald M.G., Shakespeare C.J., Ragozzine D.
<Astron. J., 162, 114-114 (2021)>
=2021AJ....162..114M 2021AJ....162..114M (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets; Stars, K-type; Stars, dwarfs; Optical
Keywords: Planetary system formation; Exoplanet dynamics; Astrostatistics
N-body simulations; Exoplanet evolution
Abstract:
Since the launch of the Kepler space telescope in 2009 and the
subsequent K2 mission, hundreds of multiplanet systems have been
discovered. The study of such systems, both as individual systems and
as a population, leads to a better understanding of planetary
formation and evolution. Kepler-80, a K dwarf hosting six
super-Earths, was the first system known to have four planets in a
chain of resonances, a repeated geometric configuration. Transiting
planets in resonant chains can enable us to estimate not only the
planets' orbits and sizes but also their masses. Since the original
resonance analysis and TTV fitting of Kepler-80, a new planet has been
discovered whose signal likely altered the measured masses of the
other planets. Here, we determine masses and orbits for all six
planets hosted by Kepler-80 by direct forward photodynamical modeling
of the light curve of this system. We then explore the resonant
behavior of the system. We find that the four middle planets are in a
resonant chain, but that the outermost planet only dynamically
interacts in ∼14% of our solutions. We also find that the system and
its dynamic behavior are consistent with in situ formation and compare
our results to two other resonant chain systems, Kepler-60 and
TRAPPIST-1.
Description:
We use all photometric data available by Kepler for this study,
including 1 minute short cadence observations from Quarters 7, 8, 9,
11, 12, 13, 15, 16, and 17.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 153 6 Resulting planetary parameters
table2.dat 80 19626 *Future times and durations
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Note on table2.dat : The nominal values given are the median and the
errors use the 16th and 84th percentile with times and durations
treated separately with respect to sorting.
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/197/8 : Keplers candidate multiple transiting planets (Lissauer+, 2011)
J/ApJS/208/22 : Transit timing variation for 12 planetary pairs (Xie, 2013)
J/ApJ/784/45 : Kepler's multiple planet candidates. III. (Rowe+, 2014)
J/AJ/152/105 : Kepler-80 transit timing observations (MacDonald+, 2016)
J/ApJ/822/86 : False positive probab. for Q1-Q17 DR24 KOIs (Morton+, 2016)
J/AJ/154/5 : Transit timing variations of 145 Kepler planets (Hadden+, 2017)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
10 A1 --- Comp Planet component
12- 19 F8.5 d Porb [0.98/15] Orbital period
21- 27 F7.5 d e_Porb [2e-05/0.001] Negative error on Porb
29- 35 F7.5 d E_Porb [1e-05/0.001] Positive error on Porb
37- 41 F5.3 Rgeo Rad [1.03/2.51] Radius
43- 47 F5.3 Rgeo e_Rad [0.02/0.3] Negative error on Rad
49- 53 F5.3 Rgeo E_Rad [0.03/0.3] Positive error on Rad
55- 59 F5.3 Mgeo Mass [0.06/5.95]? Mass
61- 65 F5.3 Mgeo e_Mass [0.03/0.7]? Negative error on Mass
67- 71 F5.3 Mgeo E_Mass [0.04/0.8]? Positive error on Mass
73- 77 F5.2 g/cm3 Dens [0.31/14.6]? Bulk density (ρ)
79- 82 F4.2 g/cm3 e_Dens [0.2/2]? Negative error on Dens
84- 87 F4.2 g/cm3 E_Dens [0.2/2]? positive error on Dens
89- 94 F6.4 --- e [0.003/0.19] Eccentricity
96-101 F6.4 --- e_e [0.002/0.05] Negative error on e
103-108 F6.4 --- E_e [0.003/0.09] Positive error on e
110-115 F6.3 deg i [85.9/89.3] Inclination
117-121 F5.3 deg e_i [0.04/0.6] Negative error on i
123-127 F5.3 deg E_i [0.04/0.5] Positive error on i
129-137 F9.5 d BJD [758/801] Midtransit time estimated; BJD-2454900
139-145 F7.5 d e_BJD [0.0005/0.01] Negative error on BJD
147-153 F7.5 d E_BJD [0.0004/0.01] Positive error on BJD
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- Comp Planet component
3- 14 F12.6 d BJD [4500/15000] Transit time in BJD-2454900
16- 29 F14.9 min E_BJD [6.37/1750] Upper uncertaity in BJD
31- 44 F14.9 min e_BJD [4.86/1732] Lower uncertaity in BJD
46- 56 F11.9 h Dur [1.38/2.52] Transit duration in hours
58- 68 F11.9 h E_Dur [0.07/1.1] Upper uncertainty in Dur (1)
70- 80 F11.9 h e_Dur [0.05/0.51] Lower uncertainty in Dur (1)
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Note (1): Duration uncertainties include stellar radius uncertainty.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 06-Dec-2021