J/AJ/164/220 10 exoplanets from the Exoplanet Transit Database (Hagey+, 2022)
Evidence of Long-term Period Variations in the Exoplanet Transit Database (ETD).
Hagey S.R., Edwards B., Boley A.C.
<Astron. J., 164, 220 (2022)>
=2022AJ....164..220H 2022AJ....164..220H
ADC_Keywords: Exoplanets; Optical
Keywords: Exoplanets ; Exoplanet dynamics ; Transit timing variation
method
Abstract:
We analyze a large number of citizen science data and identify eight
hot Jupiter systems that show evidence for deviations from a constant
orbital period: HAT-P-19b, HAT-P-32b, TrES-1b, TrES-2b, TrES-5b,
WASP-4b, WASP-10b, and WASP-12b. The latter system is already well
known to exhibit strong evidence for tidal orbital decay and serves as
an important control for this study. Several other systems we identify
have disputed period drifts in the literature, allowing the results
here to serve as an independent analysis. The citizen science data are
from the Exoplanet Transit Database (ETD), which is a global project
established in 2008 by the Variable Star and Exoplanet Section of the
Czech Astronomical Society. With over 400 planets and 12000
contributed observations spanning 15yr, the ETD is brimming with
potential for studying the long-term orbital evolution of close-in hot
Jupiters. We use our results to discuss prioritization of targets for
follow-up investigations, which will be necessary to confirm the
period drifts and their causes.
Description:
The data used in this study are from the Exoplanet Transit Database
(ETD; http://var2.astro.cz/ETD/index.php). The ETD was established in
2008 by the Variable Star and Exoplanet Section of the Czech
Astronomical Society and allows any observer to register and upload
transit observations.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 50 10 *Model comparison for secondary analysis of top 10
targets
tableb1.dat 167 1251 Final cleaned data sets
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Note on table3.dat: Transit-timing model comparison for the second run
of the analysis pipeline on the reduced data of the top 10 systems of
interest.
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See also:
J/ApJ/692/L100 : Relative photometry of WASP-10 (Johnson+, 2009)
J/ApJ/692/L9 : Tidal evolution transiting extrasolar planets (Levrard+, 2009)
J/A+A/500/L45 : Observations of transits of TrES-2 exoplanet (Mislis+, 2009)
J/A+A/508/1011 : Planetary transit of TrES-1 and TrES-2 (Rabus+, 2009)
J/ApJ/691/1145 : Spectrophotometry of TrES-3 and TrES-4 (Sozzetti+, 2009)
J/ApJ/726/52 : HAT-P-18 and HAT-P-19 follow-up (Hartman+, 2011)
J/ApJ/742/59 : HAT-P-32 and HAT-P-33 follow-up (Hartman+, 2011)
J/A+A/535/A7 : Transit light curves of WASP-10 b (Maciejewski+, 2011)
J/AJ/145/68 : Five new transit light curves of TrES-3 (Jiang+, 2013)
J/MNRAS/440/1470 : Ji light curves of WTS-2 (Birkby+, 2014)
J/A+A/563/A40 : WASP-43b g'r'i'z'JHK light curves (Chen+, 2014)
J/A+A/563/A41 : WASP-43 OSIRIS transmission spectroscopy (Murgas+, 2014)
J/PASP/127/143 : WASP-39b and WASP-43b light curves (Ricci+, 2015)
J/AJ/151/17 : Eight transiting light curves of WASP-43b (Jiang+, 2016)
J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)
J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)
J/AJ/154/4 : Times of transits and occultations of WASP-12b (Patra+, 2017)
J/AJ/155/165 : Dissipation exoplanet hosts from tidal spin-up (Penev+, 2018)
J/AJ/157/217 : Transit times of 5 hot Jupiter WASP exoplanets (Bouma+, 2019)
J/A+A/622/A81 : 15 hot Jupiter exoplanets light curves (Mallonn+, 2019)
J/MNRAS/490/4230 : Transiting planet WASP-4b (Southworth+, 2019)
J/ApJ/893/L29 : WASP-4 RVs & hot Jupiter predict period changes (Bouma+, 2020)
J/AJ/159/150 : Transit times of 11 hot Jupiters (Patra+, 2020)
J/ApJ/888/L5 : Transits, occultation times and RVs of WASP-12b (Yee+, 2020)
J/A+A/656/A88 : TrES-5 photometric timeseries (Maciejewski+, 2021)
J/AJ/161/72 : 180 Transit and occultation times for WASP-12b (Turner+, 2021)
J/ApJS/259/62 : TESS transit timing of hot Jupiters (Ivshina+, 2022)
J/ApJS/258/40 : ExoClock project II. New exoplanet ephemerides (Kokori+, 2022)
J/AJ/163/281 : Radial velocity, transit & occultation WASP-4 (Turner+, 2022)
J/AJ/163/175 : WASP-12 individual transit fit with TESS (Wong+, 2022)
http://var2.astro.cz/ETD/index.php : Exoplanet Transit Database
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Planet identifier
12- 17 F6.2 ms/yr Rate [-57.7/-1] Decay rate
19- 22 F4.2 ms/yr e_Rate [0.7/7.3] Error on rate
24- 29 F6.1 --- BIC-l [190/2354] Linear bayesian information criterion
31- 36 F6.1 --- BIC-d [181/1912] BIC decay
38- 43 F6.1 --- DBIC [-442/4.4] Delta BIC (1)
45- 50 F6.1 --- BIC-p [190/1930] BIC pressession
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Note (1): The ΔBIC is calculated for the comparison of the
constant-period and orbital decay transit-timing models, where a
negative value favors the latter. The BIC values for the apsidal
precession model fits are provided for further comparison.
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- ID Planet identifier
12- 16 I5 --- Epoch [-1433/4643] Epoch
18- 35 F18.10 d BJD [2452856/2459577] Transit Center, Barycentric
Julian Date at TDB
37- 44 F8.6 d e_BJD [5e-05/0.004] Uncertainty in Transit Center
46- 46 I1 --- Qual [1/3] Data Quality Flag (1=highest)
48- 85 A38 --- Obs Observer or reference
87-167 A81 --- Note Additional or expanded observer list
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 02-Dec-2022