J/AJ/161/246 Transit time variations for 12 exoplanets (Jontof-Hutter+, 2021)
Following up the Kepler field: masses of targets for transit timing and
atmospheric characterization.
Jontof-Hutter D., Wolfgang A., Ford E.B., Lissauer J.J., Fabrycky D.C.,
Rowe J.F.
<Astron. J., 161, 246-246 (2021)>
=2021AJ....161..246J 2021AJ....161..246J (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets
Keywords: Transit timing variation method; Exoplanet systems
Abstract:
We identify a set of planetary systems observed by Kepler that merit
transit-timing variation (TTV) analysis given the orbital periods of
transiting planets, the uncertainties for their transit times, and the
number of transits observed during the Kepler mission. We confirm the
planetary nature of four Kepler Objects of Interest within
multicandidate systems. We forward-model each of the planetary systems
identified to determine which systems are likely to yield mass
constraints that may be significantly improved upon with follow-up
transit observations. We find projected TTVs diverge by more than 90
minutes after 6000 days in 27 systems, including 22 planets with
orbital periods exceeding 25 days. Such targets would benefit the most
from additional transit-timing data. TTV follow-up could push
exoplanet characterization to lower masses, at greater orbital periods
and at cooler equilibrium temperatures than is currently possible from
the Kepler data set alone. Combining TTVs and recently revised stellar
parameters, we characterize an ensemble of homogeneously selected
planets and identify planets in the Kepler field with large-enough
estimated transmission annuli for atmospheric characterization with
James Webb Space Telescope.
Description:
For most systems, we adopt the transit times of
Rowe & Thompson, 2015arXiv150400707R 2015arXiv150400707R. For Kepler-289d, we use the
times of Schmitt+, 2014, J/ApJ/795/167. For planets that are likely
interacting that are not in the TTV catalog of Rowe & Thompson (2015),
we measured center of transit times using the photometric transit
modeling transitfit5 package.
Objects:
---------------------------------------------------
RA (ICRS) DE Designation(s)
---------------------------------------------------
19 38 40.32 +43 51 11.8 KOI-520 = Kepler-176
19 21 51.62 +47 55 45.1 KOI-750 = Kepler-662
19 49 51.67 +42 52 58.3 KOI-1353 = Kepler-289
19 32 36.20 +41 43 45.3 KOI-3503 = KOI-3503
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table20.dat 99 244 Transit times for KOI-520 b,c,d,e
table21.dat 74 269 Transit times for KOI-750.02, KOI-750.03,
Kepler-662b
table22.dat 74 39 Transit times for Kepler-289 b, d, c
table23.dat 49 60 Transit times for KOI-3503.01, KOI-3503.02
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See also:
J/ApJS/208/16 : Kepler transit timing observations. VIII. (Mazeh+, 2013)
J/ApJ/787/80 : 139 Kepler planets transit time variations (Hadden+, 2014)
J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)
J/ApJ/795/167 : Transits of PH3 b, c, d through January, 2019 (Schmitt+, 2014)
J/ApJS/210/20 : Small Kepler planets radial velocities (Marcy+, 2014)
J/ApJS/210/25 : Transit timing variation 15 planetary pairs. II. (Xie, 2014)
J/MNRAS/448/1044 : Simulation data 50 planetary model systems (Hansen+, 2015)
J/ApJ/825/19 : Mass-radius relationship planets with Rp<4 (Wolfgang+, 2016)
J/ApJS/225/9 : Kepler TTVs IX The full long-cadence data set (Holczer+, 2016)
J/AJ/154/5 : Transit timing variations of 145 Kepler planets (Hadden+, 2017)
J/A+A/615/A79 : KOINet. Study of exoplanet systems via TTVs (von Essen+, 2018)
J/A+A/618/A41 : Photometry of Kepler-9b and c transits (Freudenthal+, 2018)
J/ApJ/866/99 : Revised radii of KIC stars & planets Gaia DR2 (Berger+, 2018)
J/ApJS/235/38 : Kepler planetary cand. VIII. DR25 reliability (Thompson+, 2018)
J/MNRAS/488/2836 : ExoMol Molecular linelists. XXXIII. TiO (McKemmish+, 2019)
J/AJ/159/57 : HST spectroscopic LCs Kepler 51b & 51d (Libby-Roberts+, 2020)
J/AJ/159/280 : Gaia-Kepler stellar properties catalog.I. (Berger+, 2020)
J/AJ/160/201 : Infrared transmission spectrum for Kepler-79d (Chachan+, 2020)
Byte-by-byte Description of file: table20.dat
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Bytes Format Units Label Explanations
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1- 13 F13.8 d TT-b [65/1523] Transit time, KOI-520 b; BJD-2454900
15- 24 F10.8 d e_TT-b [0.008/0.04] Measurement uncertainty in TT-b
26- 38 F13.8 d TT-c [65/1507]? Transit time, KOI-520 c; BJD-2454900
40- 49 F10.8 d e_TT-c [0.003/0.02]? Measurement uncertainty in TT-c
51- 63 F13.8 d TT-d [69/1512]? Transit time, KOI-520 d; BJD-2454900
65- 74 F10.8 d e_TT-d [0.004/0.02]? Measurement uncertainty in TT-d
76- 88 F13.8 d TT-e [105/1487]? Transit time, KOI-520 e; BJD-2454900
90- 99 F10.8 d e_TT-e [0.01/0.04]? Measurement uncertainty in TT-e
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Byte-by-byte Description of file: table21.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.8 d TT-02 [65/1524] Transit time, KOI-750.02; BJD-2454900
15- 24 F10.8 d e_TT-02 [0.02/0.09] Measurement uncertainty in TT-02
26- 38 F13.8 d TT-03 [71/1524]? Transit time, KOI-750.03; BJD-2454900
40- 49 F10.8 d e_TT-03 [0.02/0.08]? Measurement uncertainty in TT-03
51- 63 F13.8 d TT-b [82/1514]? Transit time, Kepler-662 b; BJD-2454900
65- 74 F10.8 d e_TT-b [0.005/0.02]? Measurement uncertainty in TT-b
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Byte-by-byte Description of file: table22.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 13 F13.8 d TT-b [65/1483] Transit time, Kepler-289 b; BJD-2454900
15- 24 F10.8 d e_TT-b [0.005/0.02] Measurement uncertainty in TT-b
26- 38 F13.8 d TT-d [75/1463]? Transit time, Kepler-289 d; BJD-2454900
40- 49 F10.8 d e_TT-d [0.003/0.007]? Measurement uncertainty in TT-d
51- 63 F13.8 d TT-c [169/1429]? Transit time, Kepler-289 c; BJD-2454900
65- 74 F10.8 d e_TT-c [0.0005/0.0009]? Measurement uncertainty in TT-c
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Byte-by-byte Description of file: table23.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 13 F13.8 d TT-01 [81/1523] Transit time, KOI-3503.01; BJD-2454900
15- 24 F10.8 d e_TT-01 [0.03/0.08] Measurement uncertainty in TT-01
26- 38 F13.8 d TT-02 [77/1510]? Transit time, KOI-3503.02; BJD-2454900
40- 49 F10.8 d e_TT-02 [0.02/0.07]? Measurement uncertainty in TT-02
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 16-Aug-2021