Investigation of Orbital Decay and Global Modeling of the Planet WASP-43 b

Davoudi, Fatemeh; Baştürk, Özgür; Yalçınkaya, Selçuk; Esmer, Ekrem Murat; Safari, Hossein

doi:10.3847/1538-3881/ac1baf

Cited by 15 publications

(10 citation statements)

References 67 publications

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“…Whereas, the

{R}_{\mathrm{p}}

measurements for the exoplanets WASP‐43 b (Saha et al, 2021), and WASP‐36 b (this work), agree overall within

2\sigma

with their previous ground‐based estimations. The uncertainty on the planetary radius is lower in the work of Davoudi et al (2021) for WASP‐43 b by approximately 98%, and for WASP‐100 b by 31%–65%, in the work of Jansen and Kipping (2020). In the current work, we improved the positive uncertainty for HATS‐1 b by approximately 40%.…”

Section: Resultsmentioning

confidence: 88%

“…value is in agreement within

2\sigma

from the ground‐based investigations. Regarding WASP‐43 b, in the work of Davoudi et al (2021), the authors used a combination of ground‐based data from the TÜBİTAK National Observatory of Turkey and TESS observations in order to provide a parameter refinement of this exoplanet, along with an investigation on its orbital decay. The authors report a

2.6\sigma

decrease of

b

in comparison to results presented by Saha et al (2021).…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Comparative study of nearly‐grazing and fully‐grazing exoplanet system parameters derived with TESS and ground‐based instruments

et al. 2023

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Grazing transiting systems are rare and difficult to parameterize due to their partial transit geometry. We investigated a sample of 43 nearly‐grazing to fully‐grazing transiting exoplanetary systems, using datasets provided by the Transiting Exoplanet Satellite Survey (TESS), aiming first to refine major system parameters. We focus on the two parameters, impact parameter b$$ b $$ and planetary radius Rp$$ {R}_{\mathrm{p}} $$, through a comparison of TESS light curves with ground‐based light curves. We investigate if there is a potential systematic trend between ground‐based and space‐based investigations that would possibly lead to a redefinition of the grazing nature of those exoplanetary systems. Our results have shown that the b$$ b $$ value is confirmed for most of the systems within 2σ$$ 2\sigma $$, and refined significantly for Kilodegree Extremely Little Telescope (KELT)‐8 b, while the uncertainty on b$$ b $$ was improved for five systems with b>0.8$$ b>0.8 $$. The Rp$$ {R}_{\mathrm{p}} $$ measurements of four systems were successfully refined, while the uncertainty of Rp$$ {R}_{\mathrm{p}} $$ was improved for the majority of exoplanets with b>0.9$$ b>0.9 $$. Furthermore, a systematic trend is more pronounced for systems with b>0.9$$ b>0.9 $$, where there is a mean overestimation on the ground‐based derived Rp$$ {R}_{\mathrm{p}} $$ by 0.15RJ$$ 0.15{R}_{\mathrm{J}} $$. We concluded eventually that from our sample only five systems are truly grazing, while four systems that were considered as grazing are not.

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“…Whereas, the

{R}_{\mathrm{p}}

measurements for the exoplanets WASP‐43 b (Saha et al, 2021), and WASP‐36 b (this work), agree overall within

2\sigma

Section: Resultsmentioning

confidence: 88%

“…value is in agreement within

2\sigma

2.6\sigma

decrease of

b

in comparison to results presented by Saha et al (2021).…”

Section: Resultsmentioning

confidence: 99%

Comparative study of nearly‐grazing and fully‐grazing exoplanet system parameters derived with TESS and ground‐based instruments

et al. 2023

View full text Add to dashboard Cite

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“…It is likely that both migration mechanisms may contribute separately to different sources, or even act in the same source while in different evolutionary stages. Interestingly, the system parameters of the five reported tidal dissipation exoplanets show obvious diversity (Patra et al, 2017;Dong et al, 2021;Davoudi et al, 2021;Yang & Wei, 2021;Yang & Chary, 2021, submitted). Extending the available sample crucial for further statistic investigations.…”

Section: Discussionmentioning

confidence: 99%

“…The transit timings of WASP-32b are monitored and no significant TTV is found with the available data (Sun et al, 2015). WASP-43b is reported as a candidate showing period decay (Jiang et al, 2016) which arises wide attention and scientific discussions (Davoudi et al, 2021;Garai et al, 2021). WASP-4b presents a significant TTV and is furtherly explained by the Rømer effect (Bouma et al, 2019(Bouma et al, , 2020.…”

Section: Introductionmentioning

confidence: 97%

Detecting and Monitoring Tidal Dissipation of Hot Jupiters in the Era of SiTian

Yang,

Wang,

Wei

et al. 2022

Preprint

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Transit Timing Variation (TTV) of hot Jupiters provides direct observational evidence of planet tidal dissipation. Detecting tidal dissipation through TTV needs high precision transit timings and long timing baselines. In this work, we predict and discuss the potential scientific contribution of SiTian Survey in detecting and analyzing exoplanet TTV. We develop a tidal dissipation detection pipeline for SiTian Survey that aims at time-domain astronomy with 72 1-meter optical telescopes. The pipeline includes the modules of light curve deblending, transit timing obtaining, and TTV modeling. SiTian is capable to detect more than 25,000 exoplanets among which we expect ∼50 sources showing evidence of tidal dissipation. We present detection and analysis of tidal dissipating targets, based on simulated SiTian light curves of XO-3b and WASP-161b. The transit light curve modeling gives consistent results within 1σ to input values of simulated light curves. Also, the parameter uncertainties predicted by Monte-Carlo Markov Chain are consistent with the distribution obtained from simulating and modeling the light curve 1000 times. The timing precision of SiTian observations is ∼ 0.5 minutes with one transit visit. We show that differences between TTV origins, e.g., tidal dissipation, apsidal precession, multiple planets, would be significant, considering the timing precision and baseline. The detection rate of tidal dissipating hot Jupiters would answer a crucial question of whether the planet migrates at an early formation stage or random stages due to perturbations, e.g., planet scattering, secular interaction. SiTian identified targets would be constructive given that the sample would extend tenfold.

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“…This is the maximum possible contribution from tidal decay because tidal decay would be suppressed if the system is synchronized. Typical values of the reduced tidal quality factor are Q ∼ 10 6 (Ogilvie 2014; Patra et al 2020), although lower values (Q ∼ 4 × 10 5 ) have also been inferred for short-period planets like WASP-43 b (Davoudi et al 2021).…”

Section: Mechanisms That Contribute To the Period Drift Rate Of Eclip...mentioning

confidence: 99%

Eclipse timing the Milky Way's gravitational potential

Chakrabarti,

Stevens,

Wright

et al. 2021

Preprint

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We show that a small, but measurable shift in the eclipse mid-point time of eclipsing binary (EBs) stars of ∼ 0.1 seconds over a decade baseline can be used to directly measure the Galactic acceleration of stars in the Milky Way at ∼ kpc distances from the Sun. We consider contributions to the period drift rate from dynamical mechanisms other than the Galaxy's gravitational field, and show that the Galactic acceleration can be reliably measured using a sample of Kepler EBs with orbital and stellar parameters from the literature. Given the uncertainties on the formulation of tidal decay, our approach here is necessarily approximate, and the contribution from tidal decay is an upper limit assuming the stars are not tidally synchronized. We also use simple analytic relations to search for well-timed sources in the Kepler field, and find ∼ 70 additional detached EBs with low eccentricities that have estimated timing precision better than 1 second. We illustrate the method with a prototypical, precisely timed EB using an archival Kepler light curve and a modern synthetic HST light curve (which provides a decade baseline). This novel method establishes a realistic possibility for obtaining fundamental Galactic parameters using eclipse timing to measure Galactic accelerations, along with other emerging new methods, including pulsar timing and extreme precision radial velocity observations. This acceleration signal grows quadratically with time. Therefore, given baselines established in the near-future for distant EBs, we can expect to measure the period drift in the future with space missions like JWST and the Roman Space Telescope.

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Investigation of Orbital Decay and Global Modeling of the Planet WASP-43 b

Cited by 15 publications

References 67 publications

Comparative study of nearly‐grazing and fully‐grazing exoplanet system parameters derived with TESS and ground‐based instruments

Comparative study of nearly‐grazing and fully‐grazing exoplanet system parameters derived with TESS and ground‐based instruments

Detecting and Monitoring Tidal Dissipation of Hot Jupiters in the Era of SiTian

Eclipse timing the Milky Way's gravitational potential

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