techniques: photometric; planets and satellites: detection; planets and satellites: individual: HIP 41378 f; stars: individual: HIP 41378; Astrophysics - Earth and Planetary Astrophysics
Abstract :
[en] 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).
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Bryant, Edward M.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK Edward.bryant@warwick.ac.uk
Bayliss, Daniel; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Wheatley, Peter J.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Ducrot, Elsa ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Burdanov, Artem; Astrobiology Research Unit, Université de Liège, Allée du 6 Août 19C, B-4000 Liège, Belgium ; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Acton, Jack S.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Alves, Douglas R.; Departamento de Astronomía, Universidad de Chile, Casilla 36-D Santiago, Chile
Anderson, David R.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Armstrong, David J.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Awiphan, Supachai; National Astronomical Research Institute of Thailand, 260 Moo 4, Donkaew, Mae Rim, Chiang Mai 50180, Thailand
Cooke, Benjamin F.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Burleigh, Matthew R.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Casewell, Sarah L.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Delrez, Laetitia ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Demory, Brice-Olivier; University of Bern, Center for Space and Habitability, Gesellschaftsstrasse 6, CH-3012 Bern, Switzerland
Eigmüller, Philipp; Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, D-12489 Berlin, Germany
Fukui, Akihiko; Department of Earth and Planetary Science, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan ; Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain
Gan, Tianjun; Department of Astronomy and Tsinghua Centre for Astrophysics, Tsinghua University, Beijing 100084, China
Gill, Samuel; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
Gillon, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Goad, Michael R.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Tan, Thiam-Guan; Perth Exoplanet Survey Telescope (PEST), Perth, Western, Australia
Günther, Maximilian N.; Department of Physics, and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
Hardee, Bronwen; Department of Earth and Planetary Sciences, University of California, Santa Cruz, CA 95064, USA
Henderson, Beth A.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Jehin, Emmanuel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa)
Jenkins, James S.; Departamento de Astronomía, Universidad de Chile, Casilla 36-D Santiago, Chile ; Centro de Astrofísica y Tecnologías Afines (CATA), Casilla 36-D Santiago, Chile
Kosiarek, Molly; Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA
Lendl, Monika; Observatoire Astronomique de l'Université de Genève, Chemin Pegasi 51, CH-1290 Versoix, Switzerland
Moyano, Maximiliano; Instituto de Astronomía, Universidad Católica del Norte, Angamos 0610, 1270709 Antofagasta, Chile
Narita, Norio; Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain ; Komaba Institute for Science, The University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan ; JST, PRESTO, 3-8-1 Komaba, Meguro, Tokyo 153-8902, Japan ; Astrobiology Center, 2-21-1 Osawa, Mitaka, Tokyo 181-8588, Japan
Niraula, Prajwal; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Odden, Caroline E.; Phillips Academy Observatory, Phillips Academy, Andover, MA 01810, USA
Palle, Enric; Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spain
Parviainen, Hannu; Instituto de Astrofísica de Canarias (IAC), E-38205 La Laguna, Tenerife, Spain ; Departamento de Astrofísica, Universidad de La Laguna (ULL), E-38206 La Laguna, Tenerife, Spain
Pedersen, Peter P.; Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge CB3 0HE, UK
Pozuelos, Francisco J. ; Astrobiology 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, Belgium
V Rackham, Benjamin; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
Sebastian, Daniel ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic
Stockdale, Chris; Hazelwood Observatory, Hazelwood, Australia
Tilbrook, Rosanna H.; School of Physics and Astronomy, University of Leicester, Leicester LE1 7RH, UK
Triaud, Amaury H. M. J.; School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
Udry, Stéphane; Observatoire Astronomique de l'Université de Genève, Chemin Pegasi 51, CH-1290 Versoix, Switzerland
Vines, Jose I.; Dept. of Physics, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK ; Centre for Exoplanets and Habitability, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, UK
West, Richard G.; Department of Earth, Atmospheric and Planetary Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA)
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