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Is the orbit of the exoplanet WASP-43b really decaying? TESS and MuSCAT2 observations confirm no detection

Garay, Z. and Pribulla, T. and Parviainen, H and Palle, E. and Claret, A. and Szigeti, L. and Bejar, V. and Casasayas-Barris, N. and Crouzet, N. and Fukui, A. and Chen, G. and Kawauchi, K. and Klagyivik, Peter and Kurita, S. and Kusakabe, N. and De Leon, J. and Livingston, J. H. and Luque, R. and Mori, M. and Murgas, F. and Narita, N. and Nishiumi, T. and Oshagh, M. and Szabo, Gy. M. and Tamura, M. and Terada, Y and Watanabe, N. (2021) Is the orbit of the exoplanet WASP-43b really decaying? TESS and MuSCAT2 observations confirm no detection. Monthly Notices of the Royal Astronomical Society, 508 (4), pp. 5514-5523. Oxford University Press. doi: 10.1093/mnras/stab2929. ISSN 0035-8711.

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Official URL: https://academic.oup.com/mnras/article/508/4/5514/6388393

Abstract

Up to now, WASP-12b is the only hot Jupiter confirmed to have a decaying orbit. The case of WASP-43b is still under debate. Recent studies preferred or ruled out the orbital decay scenario, but further precise transit timing observations are needed to definitively confirm or refute the period change of WASP-43b. This possibility is given by the Transiting Exoplanet Survey Satellite (TESS) space telescope. In this work, we used the available TESS data, multicolour photometry data obtained with the Multicolor Simultaneous Camera for studying Atmospheres of Transiting exoplanets 2 (MuSCAT2) and literature data to calculate the period change rate of WASP-43b and to improve its precision, and to refine the parameters of the WASP-43 planetary system. Based on the observed-minus-calculated data of 129 mid-transit times in total, covering a time baseline of about 10 yr, we obtained an improved period change rate of P=-0.6+/-1.2 ms yr-1 that is consistent with a constant period well within 1 sigma. We conclude that new TESS and MuSCAT2 observations confirm no detection of WASP-43b orbital decay.

Item URL in elib:https://elib.dlr.de/146146/
Document Type:Article
Title:Is the orbit of the exoplanet WASP-43b really decaying? TESS and MuSCAT2 observations confirm no detection
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Garay, Z.MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary; ELTE Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112, Hungary; Astronomical Institute, Slovak Academy of Sciences, 05960 Tatranská Lomnica, SlovaUNSPECIFIED
Pribulla, T.Astronomical Institute, Slovak Academy of Sciences, 059 60 Tatranská Lomnica, SlovakiaUNSPECIFIED
Parviainen, HInstituto de Astrofísica de Canarias, La Laguna, Spain; Departamento de Astrofísica, Universidad de La Laguna, SpainUNSPECIFIED
Palle, E.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Claret, A.Instituto de Astrofísica de Andalucía, CSIC, Apartado 3004, E-18080 Granada, Spain; Dept. Física Teórica y del Cosmos, Universidad de Granada, Campus de Fuentenueva s/n, E-10871 Granada, SpainUNSPECIFIED
Szigeti, L.MTA-ELTE Exoplanet Research Group, 9700 Szombathely, Szent Imre h. u. 112, Hungary; ELTE Gothard Astrophysical Observatory, 9700 Szombathely, Szent Imre h. u. 112, Hungary; MTA-ELTE Lendület Milky Way Research Group, 9700 Szombathely, Szent Imre h. u. 112UNSPECIFIED
Bejar, V.Instituto de Astrofísica de Canarias, 38205 La Laguna, Tenerife, Spain | Departamento de Astrofisica, Universidad de La Laguna, 38206 La Laguna, SpainUNSPECIFIED
Casasayas-Barris, N.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Crouzet, N.European Space Agency, ESTEC, Keplerlaan 1, 2201 AZ Noordwijk, The NetherlandsUNSPECIFIED
Fukui, A.Okayama Astrophysical Observatory, National Astronomical Observatory of Japan, Asakuchi, Okayama 719-0232, JapanUNSPECIFIED
Chen, G.Key Laboratory of Planetary Sciences, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210023, ChinaUNSPECIFIED
Kawauchi, K.Department of Multi-Disciplinary Sciences, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, JapanUNSPECIFIED
Klagyivik, PeterUNSPECIFIEDhttps://orcid.org/0000-0003-0700-6176
Kurita, S.Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku,Tokyo 113-0033, JapanUNSPECIFIED
Kusakabe, N.National Astronomical Observatory of Japan, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; Astrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JapanUNSPECIFIED
De Leon, J.Department of Astronomy, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Livingston, J. H.Department of Astronomy, Graduate School of Science, The University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo, 113-0033, JapanUNSPECIFIED
Luque, R.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain );; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Mori, M.The University of Tokyo, 7-3-1 Hongo, Bunkyō, Tokyo, 113-8654, JapanUNSPECIFIED
Murgas, F.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna, 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Narita, N.Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; JST, PRESTO, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; Instituto de Astrofisica de Canarias (IUNSPECIFIED
Nishiumi, T.Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1, Osawa, Mitaka,Tokyo 181-8588 Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Oshagh, M.Instituto de Astrofisica de Canarias (IAC), 38205, La Laguna, Tenerife, Spain; Departamento de Astrofisica, Universidad de La Laguna (ULL), 38206, La Laguna, Tenerife, SpainUNSPECIFIED
Szabo, Gy. M.Department of Experimental Physics & Astronomical Observatory, Szedeg, HungaryUNSPECIFIED
Tamura, M.The University of Tokyo, 7-3-1 Hongo, Bunkyō, Tokyo, 113-8654, Japan; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan; National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, JapanUNSPECIFIED
Terada, YDepartment of Astronomy, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, JapanUNSPECIFIED
Watanabe, N.Department of Astronomical Science, The Graduated University for Advanced Studies, SOKENDAI, 2-21-1, Osawa, Mitaka,Tokyo 181-8588 Japan; Astrobiology Center of NINS, 2-21-1, Osawa, Mitaka, Tokyo 181-8588, JapanUNSPECIFIED
Date:2021
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:508
DOI:10.1093/mnras/stab2929
Page Range:pp. 5514-5523
Publisher:Oxford University Press
ISSN:0035-8711
Status:Published
Keywords:methods: observational – techniques: photometric – planets and satellites: individual: WASP-43b
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Space Exploration
DLR - Research theme (Project):R - QS-Project_04 Big-Data-Plattform
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Cabrera Perez, Juan
Deposited On:24 Nov 2021 14:29
Last Modified:24 Nov 2021 14:29

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