Planet-Star Interactions with Precise Transit Timing. I. The Refined Orbital Decay Rate for WASP-12 b and Initial Constraints for HAT-P-23 b, KELT-1 b, KELT-16 b, WASP-33 b and WASP-103 b

• Autorzy: Maciejewski G. , Fernández M. , Aceituno F. , Martín-Ruiz S. , Ohlert J. , Dimitrov D. , Szyszka K. , von Essen C. , Mugrauer M. , Bischoff R. , Michel K.-U. , Mallonn M. , Stangret M. , Moździerski D.

Identyfikatory

DOI

0.32023/0001-5237/68.4.4

• Języki publikacji: EN

Abstrakty

EN

Theoretical calculations and some indirect observations show that massive exoplanets on tight orbits must decay due to tidal dissipation within their host stars. This orbital evolution could be observationally accessible through precise transit timing over a course of decades. The rate of planetary in-spiraling may not only help us to understand some aspects of evolution of planetary systems, but also can be used as a probe of the stellar internal structure. In this paper we present results of transit timing campaigns organized for a carefully selected sample of the Northern hemisphere hot Jupiter-like planets which were found to be the best candidates for detecting planet-star tidal interactions. Among them, there is the WASP-12 system which is the best candidate for possessing an in-falling giant exoplanet. Our new observations support the scenario of orbital decay of WASP-12 b and allow us to refine its rate. The derived tidal quality parameter of the host star Q'*=(1.82±0.32)×10⁵ is in agreement with theoretical predictions for subgiant stars. For the remaining systems – HAT-P-23, KELT-1, KELT-16, WASP-33, and WASP-103 – our transit timing data reveal no deviations from the constant-period models, hence constraints on the individual rates of orbital decay were placed. The tidal quality parameters of host stars in at least four systems – HAT-P-23, KELT-1, WASP-33, and WASP-103 – were found to be greater than the value reported for WASP-12. This is in line with the finding that those hosts are main sequence stars, for which efficiency of tidal dissipation is predicted to be relatively weak.

Słowa kluczowe

EN

planet-star interactions; stars: individual: HAT-P-23; stars: individual: KELT-1; stars: individual: KELT-16; stars: individual: WASP-12; stars: individual: WASP-33; stars: individual: WASP-103; planets and satellites: individual: HAT-P-23 b; planets and satellites: individual: KELT-1 b; planets and satellites: individual: KELT-16 b; planets and satellites: individual: WASP-12 b; planets and satellites: individual: WASP-33 b; planets and satellites: individual: WASP-103 b

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2018
• Tom: Vol. 68, No. 4
• Strony: 371--401
• Opis fizyczny: Bibliogr. 83 poz., rys., tab., wykr.

Twórcy

autor

Maciejewski G.

• Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland,

autor

Fernández M.

• Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía 3, 18008 Granada, Spain

autor

Aceituno F.

• Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía 3, 18008 Granada, Spain

autor

Martín-Ruiz S.

• Instituto de Astrofísica de Andalucía (IAA-CSIC), Glorieta de la Astronomía 3, 18008 Granada, Spain

autor

Ohlert J.

• Michael Adrian Observatorium, Astronomie Stiftung Trebur, 65428 Trebur, Germany
• University of Applied Sciences, Technische Hochschule Mittelhessen, 61169 Friedberg, Germany

autor

Dimitrov D.

• Institute of Astronomy and NAO, Bulgarian Academy of Science, 1784 Sofia, Bulgaria
• Department of Physics and Astronomy, Shumen University, 9700 Shumen, Bulgaria

autor

Szyszka K.

• Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland,

autor

von Essen C.

• Stellar Astrophysics Centre, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, DK-8000 Aarhus C, Denmark

autor

Mugrauer M.

• Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergässchen 2, 07745 Jena, Germany

autor

Bischoff R.

• Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergässchen 2, 07745 Jena, Germany

autor

Michel K.-U.

• Astrophysikalisches Institut und Universitäts-Sternwarte, Schillergässchen 2, 07745 Jena, Germany

autor

Mallonn M.

• Leibniz-Institut für Astrophysik Potsdam, An der Sternwarte 16, D-14482 Potsdam, Germany

autor

Stangret M.

• Centre for Astronomy, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University, Grudziądzka 5, 87-100 Toruń, Poland,

autor

Moździerski D.

• Astronomical Institute, University of Wrocław, Kopernika 11, 51-622 Wrocław, Poland

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Uwagi

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2019).