J/AJ/161/72 180 Transit and occultation times for WASP-12b (Turner+, 2021)
Decaying orbit of the hot Jupiter WASP-12b: confirmation with TESS observations.
Turner J.D., Ridden-Harper A., Jayawardhana R.
<Astron. J., 161, 72 (2021)>
=2021AJ....161...72T 2021AJ....161...72T
ADC_Keywords: Exoplanets; Stars, double and multiple; Occultations
Keywords: Exoplanets ; Exoplanet dynamics ; Exoplanet astronomy ;
Exoplanet tides
Abstract:
Theory suggests that the orbits of some close-in giant planets should
decay due to tidal interactions with their host stars. To date,
WASP-12b is the only hot Jupiter reported to have a decaying orbit, at
a rate of 29±2ms/yr. We analyzed data from NASA's Transiting
Exoplanet Survey Satellite (TESS) to verify that WASP-12b's orbit is
indeed changing. We find that the TESS transit and occultation data
are consistent with a decaying orbit with an updated period of
1.091420090±0.000000041days and a decay rate of
32.53±1.62ms/yr. We find an orbital decay timescale of
τ=P/|P|=2.90±0.14Myr. If the observed decay results from tidal
dissipation, the modified tidal quality factor is
Q*'=1.39±0.15x105, which falls at the lower end of values
derived for binary star systems and hot Jupiters. Our result
highlights the power of space-based photometry for investigating the
orbital evolution of short-period exoplanets.
Description:
Transiting Exoplanet Survey Satellite (TESS) observed WASP-12b in
Sector 20 (2019 December 24 through 2020 January 20). These
observations were processed by the Science Processing Operations
Center (SPOC) pipeline. All of the SPOC data products are publicly
accessible from the Mikulski Archive for Space Telescopes (MAST;
http://archive.stsci.edu/).
Objects:
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RA (2000) DE Designation(s)
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06 30 32.80 +29 40 20.3 WASP-12b = WASP-12b
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 41 180 WASP-12b transit and occultation times
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See also:
J/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)
J/ApJ/727/125 : Two secondary eclipses of WASP-12b with Spitzer (Campo+, 2011)
J/AJ/141/179 : Transits of TrES-4b, HAT-P-3b and WASP-12b (Chan+, 2011)
J/A+A/551/A108 : Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)
J/ApJS/208/16 : Kepler transit timing observations. VIII. (Mazeh+, 2013)
J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)
J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)
J/AJ/154/4 : Times of transits and occultations of WASP-12b (Patra+, 2017)
J/AcA/68/371 : WASP and KELT planet transits (Maciejewski+, 2018)
J/AJ/158/190 : Main sequence hot Jupiter hosts good astrometry (Hamer+, 2019)
J/A+A/628/A115 : WASP-12, CoRoT-1 and TrES-3 light curves (von Essen+, 2019)
J/AJ/159/150 : Transit times of 11 hot Jupiters (Patra+, 2020)
http://archive.stsci.edu/ : MAST archives
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- Event Event Type (1)
5- 17 F13.5 d BJD [2454515/2458869] Barycentric Julian date (TDB)
of mid-observation (2)
19- 25 F7.5 d e_BJD [0.0001/0.003] 1 sigma uncertainty in BJD
27- 31 I5 --- Epoch [-1640/2348] Epoch number
33- 41 A9 --- Ref Reference (3)
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Note (1): Event Type as follows:
tra = Transit (160 occurrences)
occ = Occultation (20 occurrences)
Note (2): The transit of orbit -1640 observed by H09 was reanalyzed by M13.
The occultation of orbit -722 observed by D15 was reanalyzed by P17.
Note (3): References as follows:
H09 = Hebb+, 2009ApJ...693.1920H 2009ApJ...693.1920H
Ca11 = Campo+, 2011, J/ApJ/727/125
Ch11 = Chan+, 2011, J/AJ/141/179
Co12 = Cowan+, 2012ApJ...747...82C 2012ApJ...747...82C
Cr12 = Crossfield+, 2012ApJ...760..140C 2012ApJ...760..140C
S12 = Sada+, 2012PASP..124..212S 2012PASP..124..212S
F13 = Fohring+, 2013MNRAS.435.2268F 2013MNRAS.435.2268F
C13 = Copperwheat+, 2013MNRAS.434..661C 2013MNRAS.434..661C
M13 = Maciejewski+, 2013, J/A+A/551/A108
S14 = Stevenson+, 2014AJ....147..161S 2014AJ....147..161S
C15 = Croll+, 2016ApJ...802...28C 2016ApJ...802...28C
D15 = Deming+, 2015ApJ...805..132D 2015ApJ...805..132D
K15 = Kreidberg+, 2015PASP..127.1161K 2015PASP..127.1161K
P17 = Patra+, 2017, J/AJ/154/4
C17 = Collins+, 2017AJ....153...78C 2017AJ....153...78C
M18 = Maciejewski+, 2018, J/AcA/68/371
YE19 = Yee+, 2020ApJ...888L...5Y 2020ApJ...888L...5Y
H19 = Hooton+, 2019MNRAS.486.2397H 2019MNRAS.486.2397H
V19 = von Essen+, 2019, J/A+A/628/A115
O19 = Ozturk & Erdem 2019MNRAS.486.2290O 2019MNRAS.486.2290O
P20 = Patra+, 2020, J/AJ/159/150
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 06-Apr-2021