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A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f

Bryant, Edward M and Bayliss, Daniel and Santerne, Alexandre and Wheatley, Peter J and Nascimbeni, Valerio and Ducrot, Elsa and Burdanov, Artem and Acton, Jack S and Alves, Douglas R. and Anderson, David R and Armstrong, David J and Awiphan, Supachai and Cooke, Benjamin F and Burleigh, Matthew R and Casewell, Sarah L and Delrez, Laetitia and Demory, Brice-Olivier and Eigmüller, Philipp and Fukui, Akihiko and Gan, Tianjun and Gill, Samuel and Gillon, Michael and Goad, Michael R and Tan, Thiam-Guan and Gunther, Maximilian N. and Hardee, Bronwen and Henderson, Beth and Jehin, Emmanuel and Jenkins, James S and Kosiarek, Molly and Lendl, Monika and Moyano, Maximiliano and Murray, Catriona and Narita, Norio and Niraula, Prajwal and Odden, Caroline and Palle, Enric and Parviainen, Hannu and Pedersen, Peter P and Pozuelos, Francisco J and V Rackham, Benjamin and Sebastian, Daniel and Stockdale, Chris and Tilbrook, Rosanna and Thompson, Samantha J. and Triaud, Amaury and Udry, Stephane and Vines, Jose I and West, Richard G and de Wit, Julien (2021) A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f. Monthly Notices of the Royal Astronomical Society: Letters, 504 (1), L45-L50. Oxford University Press. doi: 10.1093/mnrasl/slab037. ISSN 1745-3925.

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Official URL: https://academic.oup.com/mnrasl/article/504/1/L45/6228864

Abstract

HIP 41378 f is a temperate 9.2 ± 0.1 R⊕ planet with period of 542.08 d and an extremely low density of 0.09 ± 0.02 g cm-3. It transits the bright star HIP 41378 (V = 8.93), making it an exciting target for atmospheric characterization including transmission spectroscopy. HIP 41378 was monitored photometrically between the dates of 2019 November 19 and 28. We detected a transit of HIP 41378 f with NGTS, just the third transit ever detected for this planet, which confirms the orbital period. This is also the first ground-based detection of a transit of HIP 41378 f. Additional ground-based photometry was also obtained and used to constrain the time of the transit. The transit was measured to occur 1.50 h earlier than predicted. We use an analytic transit timing variation (TTV) model to show the observed TTV can be explained by interactions between HIP 41378 e and HIP 41378 f. Using our TTV model, we predict the epochs of future transits of HIP 41378 f, with derived transit centres of TC, 4 = 2459 355.087-0.022+0.031 (2021 May) and TC, 5 = 2459 897.078-0.060+0.114 (2022 November).

Item URL in elib:https://elib.dlr.de/142360/
Document Type:Article
Title:A transit timing variation observed for the long-period extremely low-density exoplanet HIP 41378 f
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Bryant, Edward MDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Bayliss, DanielUniversity of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, UKUNSPECIFIED
Santerne, AlexandreAix-Marseille Université, CNRS, CNES, LAM, Marseilles, FranceUNSPECIFIED
Wheatley, Peter JDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Nascimbeni, ValerioINAF - Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, I-35122 Padova, ItalyUNSPECIFIED
Ducrot, ElsaSpace sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 17, Bat. B5C, 4000 Liège, BelgiumUNSPECIFIED
Burdanov, ArtemSpace sciences, Technologies and Astrophysics Research (STAR) Institute, Universite de Liege, Liege, BelgiumUNSPECIFIED
Acton, Jack SSchool of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UKUNSPECIFIED
Alves, Douglas R.Departamento de Astronomía, Universidad de Chile, Casilla 36-D Santiago, ChileUNSPECIFIED
Anderson, David RDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Armstrong, David JDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Awiphan, SupachaiNational Astronomical Research Institute of Thailand, 260 Moo 4, Donkaew, Mae Rim, Chiang Mai 50180, ThailandUNSPECIFIED
Cooke, Benjamin FDept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Burleigh, Matthew RSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Casewell, Sarah LSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Delrez, LaetitiaAstrobiology Research Unit, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium; Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19C Allèe du 6 Août, B-4000 Liège, Belgium; Observatoire AstronomiquUNSPECIFIED
Demory, Brice-OlivierUniversity of Bern, Center for Space and Habitability, Gesellschaftsstrasse 6, CH-3012 Bern, SwitzerlandUNSPECIFIED
Eigmüller, PhilippPhilipp.Eigmueller (at) dlr.dehttps://orcid.org/0000-0003-4096-0594
Fukui, AkihikoSubaru Telescope Okayama Branch Office, National Astronomical Observatory of Japan, NINS, 3037-5 Honjo, Kamogata, Asakuchi, Okayama 719-0232, Japan ; Instituto de Astrofísica de Canarias, C/ Vía Láctea, s/n, 38205 La Laguna, SpainUNSPECIFIED
Gan, TianjunDepartment of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing, ChinaUNSPECIFIED
Gill, SamuelCentre for Exoplanets and Habitability, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UK Dept. of Physics, University of Warwick , Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Gillon, MichaelInstitut d'Astrophysique et de Géophysique, Université de Liège, Liège, BelgiumUNSPECIFIED
Goad, Michael RSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Tan, Thiam-GuanPerth Exoplanet Survey Telescope, Perth, Western Australia, AustraliaUNSPECIFIED
Gunther, Maximilian N.Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
Hardee, BronwenDepartment of Earth and Planetary Sciences, University of California, Santa Cruz, CA 95064, USAUNSPECIFIED
Henderson, BethSchool of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UKUNSPECIFIED
Jehin, EmmanuelSpace sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, Allée du 6 Août 17, Bat. B5C, 4000 Liège, BelgiumUNSPECIFIED
Jenkins, James SDepartamento de Astronomía, Universidad de Chile, Camino el Observatorio 1515, Las Condes, Casilla 36-D, 7591245, Santiago, ChileUNSPECIFIED
Kosiarek, MollyDepartment of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USAUNSPECIFIED
Lendl, MonikaObservatoire de Genève, Université de Genève, Chemin des Maillettes 51, 1290 Sauverny, SwitzerlandUNSPECIFIED
Moyano, MaximilianoInstituto de Astronomía, Universidad Católica del Norte , Angamos 0610, 1270709 Antofagasta, ChileUNSPECIFIED
Murray, CatrionaInstituto de Astronomía, Angamos 0610, D-1272709, Antofagasta, ChileUNSPECIFIED
Narita, NorioAstrobiology Center, NINS, 2-21-1 Osawa, Mitaka, Tokyo 181–8588, JapanUNSPECIFIED
Niraula, PrajwalAstronomy Department and Van Vleck Observatory, Wesleyan University, Middletown, CT 06459, USAUNSPECIFIED
Odden, CarolinePhillips Academy Observatory, Phillips Academy, Andover, MA 01810, USAUNSPECIFIED
Palle, EnricInstituto de Astrofísica de Canarias, C/ Vía Láctea s/n, E-38205 La Laguna, SpainUNSPECIFIED
Parviainen, HannuUniversity of HelsinkiUNSPECIFIED
Pedersen, Peter PAstrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Pozuelos, Francisco JAstrobiology Research Unit, Université de Liège, 19C Allèe du 6 Août, B-4000 Liège, Belgium; Space Sciences, Technologies and Astrophysics Research (STAR) Institute, Université de Liège, 19C Allèe du 6 Août, B-4000 Liège, BelgiumUNSPECIFIED
V Rackham, BenjaminDepartment of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USAUNSPECIFIED
Sebastian, DanielSchool of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UKUNSPECIFIED
Stockdale, ChrisHazelwood Observatory, Hazelwood, AustraliaUNSPECIFIED
Tilbrook, RosannaDepartment of Physics and Astronomy, University of Leicester , University Road, Leicester LE1 7RH, UKUNSPECIFIED
Thompson, Samantha J.Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UKUNSPECIFIED
Triaud, AmaurySchool of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UKUNSPECIFIED
Udry, StephaneObservatoire Astronomique de l'Université de Genève, 51 Ch. des Maillettes, CH-1290 Versoix, SwitzerlandUNSPECIFIED
Vines, Jose IDepartamento de Astronomia, Universidad de Chile, Casilla 36-D, Santiago, ChileUNSPECIFIED
West, Richard GDepartment of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UKUNSPECIFIED
de Wit, JulienDepartment of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USAUNSPECIFIED
Date:June 2021
Journal or Publication Title:Monthly Notices of the Royal Astronomical Society: Letters
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:No
Volume:504
DOI :10.1093/mnrasl/slab037
Page Range:L45-L50
Publisher:Oxford University Press
ISSN:1745-3925
Status:Published
Keywords:techniques: photometric; planets and satellites: detection; planets and satellites: individual: HIP 41378 f; stars: individual: HIP 41378; Astrophysics - Earth and Planetary Astrophysics
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 - Project PLATO - PMC and Science
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Extrasolar Planets and Atmospheres
Deposited By: Eigmüller, Dr. Philipp
Deposited On:21 May 2021 07:26
Last Modified:21 May 2021 07:26

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