J/AJ/162/210 Transit Time Variations (TTVs) of WASP-43 (Davoudi+, 2021)
Investigation of orbital decay and global modeling of the planet WASP-43 b.
Davoudi F., Basturk O., Yalcinkaya S., Esmer E.M., Safari H.
<Astron. J., 162, 210-210 (2021)>
=2021AJ....162..210D 2021AJ....162..210D (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets; Photometry, infrared; Optical
Keywords: Exoplanet systems; Hot Jupiters; Exoplanets
Abstract:
WASP-43b is one of the most important candidates for detecting an
orbital decay. We investigate pieces of evidence for this expectation
as variations in its transit timings, based on the ground and space
observations. The data set includes the transit observations at the
TUBITAK National Observatory of Turkey and Transiting Exoplanet Survey
Satellite (TESS). We present a global model of the system, based on
the most precise photometry from space, ground, and archival radial
velocity data. Using the homogenized data set and modeled light
curves, we measure the mid-transit times for WASP-43b. Our analysis
agrees with a linear ephemeris for which we refine the light elements
for future observations of the system. However, there is a negative
difference between the transit timings derived from TESS data in two
sectors (9 and 35) and a hint of an orbital period decrease in the
entire data set. Both findings are statistically insignificant due to
the short baseline of observations, which prevents us from drawing
firm conclusions about the orbital decay of this ultra-short-period
planet. However, assuming the effect of this decrease of the period in
the planet's orbit, we derive a lower limit for the reduced tidal
quality factor as Q*'>(4.01±1.15)x105 from the best-fitting
quadratic function. Finally, we calculate a probable rotational period
for this system as 7.52days from the out-of-transit flux variation in
the TESS light curves due to spot modulation.
Description:
We observed this system on 2015 April 14 using a 1m telescope (T100)
at the TUBITAK National Observatory, with an SI-1100 CCD camera
(4096x4096pixel array with a pixel length of 15µ) that was kept
stable at an average temperature of -95°C CCD with a cryo-cooler.
A Bessel R filter has been employed during the observation .
TESS has observed WASP-43 at a 120s cadence using a red-optical
bandpass centered on the Cousins-Ic band. Observations have been
performed in two time intervals: in sector 9 starting on 2019 February
28 and ending on 2019 March 26 using camera 1 and CCD 1, and in sector
35 using camera 1 and CCD 2 between 2021 February 9 and March 7.
Objects:
-------------------------------------------------------
RA (2000) DE Designation(s) (Period)
-------------------------------------------------------
10 19 38.01 -09 48 22.6 WASP-43 = WASP-43 (P=7.52d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea2.dat 185 174 Details of the TTV diagram and some transit
parameters derived from exofast-v1
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
II/349 : The Pan-STARRS release 1 (PS1) Survey - DR1 (Chambers+, 2016)
II/335 : Revised catalog of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
J/A+A/542/A4 : WASP-43b thirty eclipses (Gillon+, 2012)
J/A+A/555/A150 : Physical parameters of cool solar-type stars (Tsantaki+, 2013)
J/A+A/562/L3 : WASP-103b radial velocities and light curves (Gillon+, 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/MNRAS/440/1470 : Ji light curves of WTS-2 (Birkby+, 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/AJ/152/182 : iz follow-up photometry HAT-P-65 and HAT-P-66 (Hartman+, 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/A+A/620/A58 : SWEET-Cat updated (Sousa+, 2018)
J/AJ/155/165 : Dissipation exoplanet hosts from tidal spin-up (Penev+, 2018)
J/AJ/156/18 : APOGEE DR14:Binary comps evolved stars (Price-Whelan+, 2018)
J/MNRAS/490/4230 : Transiting planet WASP-4b (Southworth+, 2019)
J/AJ/159/150 : Transit times of 11 hot Jupiters (Patra+, 2020)
J/AJ/160/155 : Light curve segments of 22 host stars with TESS (Wong+, 2020)
J/ApJ/888/L5 : Transits, occultation times and RVs of WASP-12b (Yee+, 2020)
J/ApJS/250/20 : PRot in TESS objects of interest (TOIs) (Canto+, 2020)
Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d MidTime [2455537/2459280]? Measured Mid-Transit Time
16- 23 F8.6 d e_MidTime [0.00001/0.0009]? Error on MidTime
25- 38 F14.6 d MidTimeO [2455537/2459254]? Observer-Provided
Mid-Transit Time
40- 47 F8.6 d e_MidTimeO [0/0.002]? Error on MidTimeO
49- 55 F7.1 --- Epoch [-1909/2691] Epoch of Observation
57- 65 F9.6 d O-C [-0.02/0.02] O-C
67- 75 F9.6 d Res [-0.02/0.02] Residuals From The Linear Fit
77- 85 A9 --- Band Passband
87- 99 A13 --- LCType Light Curve reference
101-108 F8.6 --- Delta [0.01/0.04]? Transit Depth
110-117 F8.6 --- e_Delta [0.00001/0.002]? Error of the Transit Depth
119-126 F8.6 d T14 [0.04/0.08]? Transit Duration
128-135 F8.6 d FWHM [0.03/0.07]? FWHM Duration
137-144 F8.6 d e_FWHM [0.00002/0.002]? Error of the FWHM Duration
146-153 F8.6 d Tau [0.006/0.02]? Ingress/egress duration
155-162 F8.6 d e_Tau [0.00003/0.004]? Error on Tau
164-167 F4.2 --- Beta [0.21/2.91]? Beta (Red Noise Parameter)
169-172 F4.2 --- PNR [0.2/8.87]? PNR (White Noise Parameter in ppt)
174-181 F8.6 --- RMS [0.0002/0.007]? RMS Error from the Model
183-183 I1 --- Dis? [0/1] 0=Discarded
185-185 A1 --- Out [*] Outlier not included in TTV analysis
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 12-Jan-2022