J/A+A/686/A84 WASP-12b photometric data (Leonardi+, 2024)
TASTE. V. A new ground-based investigation of orbital decay in the ultra-hot
Jupiter WASP-12b.
Leonardi P., Nascimbeni V., Granata V., Malavolta L., Borsato L.,
Biazzo K., Lanza A.F., Desidera S., Piotto G., Nardiello D., Damasso M.,
Cunial A., Bedin L.R.
<Astron. Astrophys. 686, A84 (2024)>
=2024A&A...686A..84L 2024A&A...686A..84L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry ; Optical
Keywords: methods: data analysis - techniques: photometric -
planets and satellites: detection - planet-star interactions -
planetary systems - stars: individual: WASP-12
Abstract:
The discovery of the first transiting hot Jupiters (HJs), giant
planets on orbital periods shorter than P∼10 days, was announced
more than 20 years ago. As both ground- and space-based follow-up
observations are piling up, we are approaching the temporal baseline
required to detect secular variations in their orbital parameters. In
particular, several recent studies have focused on constraining the
efficiency of the tidal decay mechanism to better understand the
evolutionary timescales of HJ migration and engulfment. This can be
achieved by measuring a monotonic decrease in orbital period dP/dt<0
due to mechanical energy being dissipated by tidal friction. WASP-12b
was the first HJ for which a tidal decay scenario appeared convincing,
even though alternative explanations have been hypothesized. Here we
present a new analysis based on 28 unpublished high-precision transit
light curves gathered over a 12-year baseline and combined with all
the available archival data, and an updated set of stellar parameters
from HARPS-N high-resolution spectra, which are consistent with a
main-sequence scenario, close to the hydrogen exhaustion in the core.
Our values of dP/dt=-30.72±2.67 and Q'*=(2.13±0.18)*105 are
statistically consistent with previous studies, and indicate that
WASP-12 is undergoing fast tidal dissipation. We additionally report
the presence of excess scatter in the timing data and discuss its
possible origin.
Description:
The unpublished photometric observations we present were
gathered by the TASTE project, a long-term observing program aimed at
monitoring transiting planets and creating a library of high-precision
light curves to exploit the TTV technique (Nascimbeni et al.
2011A&A...527A..85N 2011A&A...527A..85N; Granata et al. 2014AN....335..797G 2014AN....335..797G). The project
is mostly based on the Asiago Astrophysical Observatory located at
Mount Ekar (elevation: 1366m) in northern Italy, plus other
medium-class telescopes around the globe.
Objects:
-------------------------------------------------------------
RA (2000) DE Designation(s) (Per)
-------------------------------------------------------------
06 30 32.79 29 40 20.16 WASP-12 = TIC 86396382 (1.09)
-------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
t0-lit.dat 35 379 Transit times of WASP-12b (TASTE + Literature)
lc-all.dat 32 474152 Light curve of WASP-12b
t0-taste.dat 29 28 TASTE Central Transit times of WASP-12b
--------------------------------------------------------------------------------
See also:
J/ApJ/720/872 : A spectropolarimetric analysis of WASP-12 (Fossati+, 2010)
J/A+A/528/A65 : WASP-12b transits (Maciejewski+, 2011)
J/A+A/551/A108 : Multi-site obs. of WASP-12 b transit (Maciejewski+, 2013)
J/A+A/588/L6 : WASP-12 transit light curves (Maciejewski+ 2016)
J/A+A/628/A115 : WASP-12, CoRoT-1 and TrES-3 light curves (von Essen+, 2019)
J/AJ/161/72 : 180 Transit and occultation times for WASP-12b
(Turner+, 2021)
J/AJ/163/175 : WASP-12 individual transit fit with TESS (Wong+, 2022)
Byte-by-byte Description of file: t0-lit.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- Epoch Epoch number
7- 20 F14.6 d BJD Barycentric Julian date (TDB)
of mid-observation
22- 29 F8.6 d e_BJD 1 sigma uncertainty in BJD
31- 35 A5 --- Source Sources from literature (1)
--------------------------------------------------------------------------------
Note (1): Sources as follows:
H09 = Hebb et al. (2009ApJ...693.1920H 2009ApJ...693.1920H)
Ch11 = Chan et al. (2011AJ....141..179C 2011AJ....141..179C, Cat. J/AJ/141/179)
Co12 = Cowan et al. (2012ApJ...747...82C 2012ApJ...747...82C)
C13 = Copperwheat et al. (2013MNRAS.434..661C 2013MNRAS.434..661C)
M13 = Maciejewski et al. (2013A&A...551A.108M 2013A&A...551A.108M, Cat. J/A+A/551/A108)
S14 = Stevenson et al. (2014AJ....147..161S 2014AJ....147..161S)
K15 = Kreidberg et al. (2015PASP..127.1161K 2015PASP..127.1161K)
P17 = Patra et al. (2017AJ....154....4P 2017AJ....154....4P)
C17 = Collins et al. (2017AJ....153...78C 2017AJ....153...78C)
M16 = Maciejewski et al. (2016A&A...588L...6M 2016A&A...588L...6M, Cat. J/A+A/588/L6)
M18 = Maciejewski et al. (2018AcA....68..371M 2018AcA....68..371M, Cat. J/AcA/68/371)
YE19 = Yee et al. (2020ApJ...888L...5Y 2020ApJ...888L...5Y, Cat. J/ApJ/888/L5)
O19 = Ozturk & Erdem (2019MNRAS.486.2290O 2019MNRAS.486.2290O)
B19 = Baluev et al. (2019MNRAS.490.1294B 2019MNRAS.490.1294B)
P20 = Patra et al. (2020AJ....159..150P 2020AJ....159..150P, Cat. J/AJ/159/150)
T21 = Turner et al. (2021AJ....161...72T 2021AJ....161...72T, Cat. J/AJ/161/72)
W22 = Wong et al. (2022AJ....163..175W 2022AJ....163..175W, Cat. J/AJ/163/175)
ETD = Exoplanet Transit Database
B22 = Bai et al. (2022MNRAS.512.3113B 2022MNRAS.512.3113B)
TASTE = This work
--------------------------------------------------------------------------------
Byte-by-byte Description of file: lc-all.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d BJD Barycentric Julian Day (TDB)
16- 23 F8.6 --- Flux Normalized Flux
25- 32 F8.6 --- e_Flux Error on Flux
--------------------------------------------------------------------------------
Byte-by-byte Description of file: t0-taste.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- Epoch Epoch number
7- 20 F14.6 d BJD Barycentric Julian date (TDB)
of mid-observation
22- 29 F8.6 d e_BJD 1 sigma uncertainty in BJD
--------------------------------------------------------------------------------
Acknowledgements:
Pietro Leonardi, pietro.leonardi.1(at)studenti.unipd.it
References:
Nascimbeni et al., Paper I 2011A&A...527A..85N 2011A&A...527A..85N, Cat. J/A+A/527/A85
Nascimbeni et al., Paper II 2011A&A...532A..24N 2011A&A...532A..24N, Cat. J/A+A/532/A24
Nascimbeni et al., Paper III 2013A&A...549A..30N 2013A&A...549A..30N, Cat. J/A+A/549/A30
(End) Patricia Vannier [CDS] 29-Mar-2024