We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b, observed by the Transiting Exoplanet Survey Satellite, plus two transit light curves of Qatar-1b, observed by us, using a ground-based 1.23 m telescope. These light curves are combined with the best-quality light curves taken from the Exoplanet Transit Database and the literature. The precisely determined midtransit times from these light curves enable us to obtain the refined orbital ephemerides, with improved precision, for both hot Jupiters. From the timing analysis, we find indications of the presence of transit timing variations (TTVs) in both systems. Since the observed TTVs are unlikely to be short-term and periodic, the possibility of additional planets in orbits close to TrES-3b and Qatar-1b is ruled out. The possible causes of long-term TTVs, such as orbital decay, apsidal precession, the Applegate mechanism, and line-of-sight acceleration, are also examined. However, none of these possibilities are found to explain the observed TTV of TrES-3b. In contrast to this, line-of-sight acceleration appears to be a plausible explanation for the observed TTV of Qatar-1b. In order to confirm these findings, further high-precision transit and radial velocity observations of both systems would be worthwhile.

Kumar Mannaday, V., Thakur, P., Southworth, J., Jiang, I., Sahu, D.k., Mancini, L., et al. (2022). Revisiting the transit timing variations in the TrES-3 and Qatar-1 systems with TESS data. THE ASTRONOMICAL JOURNAL, 164(5) [10.3847/1538-3881/ac91c2].

Revisiting the transit timing variations in the TrES-3 and Qatar-1 systems with TESS data

L. Mancini;
2022-01-01

Abstract

We present and analyze 58 transit light curves of TrES-3b and 98 transit light curves of Qatar-1b, observed by the Transiting Exoplanet Survey Satellite, plus two transit light curves of Qatar-1b, observed by us, using a ground-based 1.23 m telescope. These light curves are combined with the best-quality light curves taken from the Exoplanet Transit Database and the literature. The precisely determined midtransit times from these light curves enable us to obtain the refined orbital ephemerides, with improved precision, for both hot Jupiters. From the timing analysis, we find indications of the presence of transit timing variations (TTVs) in both systems. Since the observed TTVs are unlikely to be short-term and periodic, the possibility of additional planets in orbits close to TrES-3b and Qatar-1b is ruled out. The possible causes of long-term TTVs, such as orbital decay, apsidal precession, the Applegate mechanism, and line-of-sight acceleration, are also examined. However, none of these possibilities are found to explain the observed TTV of TrES-3b. In contrast to this, line-of-sight acceleration appears to be a plausible explanation for the observed TTV of Qatar-1b. In order to confirm these findings, further high-precision transit and radial velocity observations of both systems would be worthwhile.
2022
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/05 - ASTRONOMIA E ASTROFISICA
English
Exoplanets; Hot Jupiters; Tidal interaction; Transit photometry; Transit timing variation method; Radial velocity; Astrophysics - Earth and Planetary Astrophysics
Kumar Mannaday, V., Thakur, P., Southworth, J., Jiang, I., Sahu, D.k., Mancini, L., et al. (2022). Revisiting the transit timing variations in the TrES-3 and Qatar-1 systems with TESS data. THE ASTRONOMICAL JOURNAL, 164(5) [10.3847/1538-3881/ac91c2].
Kumar Mannaday, V; Thakur, P; Southworth, J; Jiang, I; Sahu, Dk; Mancini, L; Va??ko, M; Kundra, E; Gajdo??, P; A-thano, N; Sariya, Dp; Yeh, L; Griv, E; Mkrtichian, D; Shlyapnikov, A
Articolo su rivista
File in questo prodotto:
File Dimensione Formato  
227-2022-AJ-164-198.pdf

accesso aperto

Tipologia: Versione Editoriale (PDF)
Licenza: Creative commons
Dimensione 2.47 MB
Formato Adobe PDF
2.47 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/316758
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 4
  • ???jsp.display-item.citation.isi??? 4
social impact