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Refined parameters ...
Refined parameters of the HD 22946 planetary system and the true orbital period of planet d
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- Garai, Z. (author)
- Eötvös Loránd University (ELTE),Slovak Academy of Sciences,ELTE Gothard Astrophysical Observatory,Astronomical Institute of the Slovak Academy of Science
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- Osborn, H. P. (author)
- Massachusetts Institute of Technology (MIT),Universität Bern,University of Bern
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- Gandolfi, D. (author)
- Universita degli Studi di Torino,University of Turin
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show more...
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- Brandeker, A. (author)
- Stockholms universitet,Stockholm University
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- Sousa, S. G. (author)
- Universidade do Porto,University of Porto,Université de Genève,University of Geneva,Istituto nazionale di astrofisica (INAF)
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- Lendl, M. (author)
- Université de Genève,University of Geneva,Universita degli Studi di Torino,University of Turin
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- Bekkelien, A. (author)
- Université de Genève,University of Geneva
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- Broeg, C. (author)
- Universität Bern,University of Bern
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- Collier Cameron, A. (author)
- University of St Andrews
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- Egger, J. A. (author)
- Universität Bern,University of Bern,European Space Research and Technology Centre (ESA ESTEC)
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- Hooton, M.J. (author)
- University Of Cambridge,Universität Bern,University of Bern
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- Alibert, Y. (author)
- Universität Bern,University of Bern
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- Delrez, L. (author)
- Universite de Liège,University of Liège
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Fossati, L. (author)
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- Salmon, S. (author)
- Université de Genève,University of Geneva,Universität Bern,University of Bern,Universidade do Porto,University of Porto,Institut de Physique du Globe de Paris,Laboratoire d'Astrophysique de Marseille,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Wilson, T.G. (author)
- University of St Andrews
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Bonfanti, A. (author)
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- Tuson, A. (author)
- University Of Cambridge
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- Ulmer-Moll, S. (author)
- Universität Bern,University of Bern,Université de Genève,University of Geneva
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- Serrano, L. M. (author)
- Universita degli Studi di Torino,University of Turin
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- Borsato, L. (author)
- Istituto nazionale di astrofisica (INAF)
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- Alonso, R. (author)
- Universidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
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- Anglada, G. (author)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)
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- Asquier, J. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Davies, M.B. (author)
- Lund University,Lunds universitet,Matematik (naturvetenskapliga fakulteten),Matematikcentrum,Institutioner vid LTH,Lunds Tekniska Högskola,LU profilområde: Naturlig och artificiell kognition,Lunds universitets profilområden,Mathematics (Faculty of Sciences),Centre for Mathematical Sciences,Departments at LTH,Faculty of Engineering, LTH,LU Profile Area: Natural and Artificial Cognition,Lund University Profile areas,European Space Astronomy Centre (ESAC),Université de Genève,University of Geneva,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Istituto nazionale di astrofisica (INAF)
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- Barros, S.C.C. (author)
- Universidade do Porto,University of Porto,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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Bárczy, T. (author)
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Baumjohann, W. (author)
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- Beck, M. (author)
- Université de Genève,University of Geneva
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- Beck, T. (author)
- Universität Bern,University of Bern
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- Benz, W. (author)
- Universität Bern,University of Bern
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- Billot, N. (author)
- Université de Genève,University of Geneva
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- Biondi, F. (author)
- Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Istituto nazionale di astrofisica (INAF)
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Bonfils, X. (author)
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- Buder, M. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Universität Wien,University of Vienna
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- Cabrera, J. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Cessa, V. (author)
- Universität Bern,University of Bern
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- Charnoz, S. (author)
- Institut de Physique du Globe de Paris,Universidade do Porto,University of Porto
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- Csizmadia, Szilard (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Cubillos, P. E. (author)
- Istituto nazionale di astrofisica (INAF),Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
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- Davies, Melvyn B. (author)
- Lunds universitet,Lund University
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- Deleuil, M. (author)
- Laboratoire d'Astrophysique de Marseille
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- Demangeon, O. (author)
- Universidade do Porto,University of Porto
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- Demory, B.O. (author)
- Universität Bern,University of Bern
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- Ehrenreich, D. (author)
- Université de Genève,University of Geneva
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- Erikson, Anders (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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- Van Eylen, Vincent (author)
- University College London (UCL)
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- Fortier, A. (author)
- Universität Bern,University of Bern
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- Fridlund, Malcolm, 1952 (author)
- Chalmers tekniska högskola,Chalmers University of Technology,Universiteit Leiden (UL),Leiden University (UL)
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- Gillon, Michaël (author)
- Universite de Liège,University of Liège,Eötvös Loránd University (ELTE)
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- Van Grootel, V. (author)
- Universite de Liège,University of Liège
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- Gudel, M. (author)
- Universität Wien,University of Vienna
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- Günther, Maximilian N. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Hoyer, S. (author)
- Laboratoire d'Astrophysique de Marseille
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- Isaak, K. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Kiss, L. (author)
- Magyar Tudomanyos Akademia,Hungarian Academy of Sciences
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Kristiansen, M. H. (author)
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- Laskar, J. (author)
- Observatoire de Paris,Paris Observatory
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- des Etangs, A. L. (author)
- Institut d 'Astrophysique de Paris,Universität Wien,University of Vienna
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- Lovis, C. (author)
- Université de Genève,University of Geneva
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- Luntzer, A. (author)
- Universität Wien,University of Vienna
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- Magrin, D. (author)
- Istituto nazionale di astrofisica (INAF)
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- Maxted, P. (author)
- Keele University
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- Mordasini, C. (author)
- Universität Bern,University of Bern
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- Nascimbeni, Valerio (author)
- Istituto nazionale di astrofisica (INAF)
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- Olofsson, G. (author)
- Stockholms universitet,Stockholm University
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- Ottensamer, R. (author)
- Universität Wien,University of Vienna
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- Pagano, I. (author)
- Istituto nazionale di astrofisica (INAF)
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- Palle, E. (author)
- Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
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- Peter, G. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF)
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- Piotto, Giampaolo P. (author)
- Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF)
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- Pollacco, Don L. (author)
- The University of Warwick
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- Queloz, D. (author)
- Université de Genève,University of Geneva,University Of Cambridge
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- Ragazzoni, Roberto (author)
- Università Degli Studi di Padova,University of Padua,Istituto nazionale di astrofisica (INAF)
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- Rando, N. (author)
- European Space Research and Technology Centre (ESA ESTEC)
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- Rauer, H. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Technische Universität Berlin
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- Ribas, I. (author)
- Institut de Ciències de l'Espai (ICE) - CSIC,Institute of Space Sciences (ICE) - CSIC,Institut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC)
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- Santos, N. C. (author)
- Universidade do Porto,University of Porto
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- Scandariato, Gaetano (author)
- Istituto nazionale di astrofisica (INAF)
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- Segransan, D. (author)
- Université de Genève,University of Geneva
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- Simon, A.E. (author)
- Universität Bern,University of Bern
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- Smith, A. M.S. (author)
- Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
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Steller, Manfred B. (author)
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- Szabó, G.M. (author)
- Eötvös Loránd University (ELTE)
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- Thomas, Nicolas (author)
- Universität Bern,University of Bern
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- Udry, S. (author)
- Université de Genève,University of Geneva
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- Venturini, J. (author)
- Université de Genève,University of Geneva
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- Walton, N. A. (author)
- University Of Cambridge,University of Cambridge
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(creator_code:org_t)
- 2023
- 2023
- English.
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In: Astronomy and Astrophysics. - 0004-6361 .- 1432-0746. ; 674
- Related links:
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https://research.cha... (primary) (free)
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http://dx.doi.org/10... (free)
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https://research.cha...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Subject headings
Close
- Context. Multi-planet systems are important sources of information regarding the evolution of planets. However, the long-period planets in these systems often escape detection. These objects in particular may retain more of their primordial characteristics compared to close-in counterparts because of their increased distance from the host star. HD 22946 is a bright (G = 8.13 mag) late F-type star around which three transiting planets were identified via Transiting Exoplanet Survey Satellite (TESS) photometry, but the true orbital period of the outermost planet d was unknown until now. Aims. We aim to use the Characterising Exoplanet Satellite (CHEOPS) space telescope to uncover the true orbital period of HD 22946d and to refine the orbital and planetary properties of the system, especially the radii of the planets. Methods. We used the available TESS photometry of HD 22946 and observed several transits of the planets b, c, and d using CHEOPS. We identified two transits of planet d in the TESS photometry, calculated the most probable period aliases based on these data, and then scheduled CHEOPS observations. The photometric data were supplemented with ESPRESSO (Echelle SPectrograph for Rocky Exoplanets and Stable Spectroscopic Observations) radial velocity data. Finally, a combined model was fitted to the entire dataset in order to obtain final planetary and system parameters. Results. Based on the combined TESS and CHEOPS observations, we successfully determined the true orbital period of the planet d to be 47.42489 ± 0.00011 days, and derived precise radii of the planets in the system, namely 1.362 ± 0.040 R, 2.328 ± 0.039 R, and 2.607 ± 0.060 R for planets b, c, and d, respectively. Due to the low number of radial velocities, we were only able to determine 3σ upper limits for these respective planet masses, which are 13.71 M, 9.72 M, and 26.57 M. We estimated that another 48 ESPRESSO radial velocities are needed to measure the predicted masses of all planets in HD 22946. We also derived stellar parameters for the host star. Conclusions. Planet c around HD 22946 appears to be a promising target for future atmospheric characterisation via transmission spectroscopy. We can also conclude that planet d, as a warm sub-Neptune, is very interesting because there are only a few similar confirmed exoplanets to date. Such objects are worth investigating in the near future, for example in terms of their composition and internal structure.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- Methods: observational
- Techniques: photometric
- Planets and satellites: fundamental parameters
- Methods: observational
- Planets and satellites: fundamental parameters
- Techniques: photometric
- Extrasolar planets
- Orbits
- Photometry
- Space telescopes
- Stars
- Echelle spectrograph
- Exo-planets
- Host-stars
- Methods:observational
- Orbital periods
- Planetary system
- Radial velocity
- Satellite observations
- Satellites
Publication and Content Type
- art (subject category)
- ref (subject category)
Find in a library
To the university's database
- By the author/editor
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Garai, Z.
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Osborn, H. P.
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Gandolfi, D.
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Brandeker, A.
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Sousa, S. G.
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Lendl, M.
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show more...
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Bekkelien, A.
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Broeg, C.
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Collier Cameron, ...
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Egger, J. A.
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Hooton, M.J.
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Alibert, Y.
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Delrez, L.
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Fossati, L.
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Salmon, S.
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Wilson, T.G.
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Bonfanti, A.
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Tuson, A.
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Ulmer-Moll, S.
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Serrano, L. M.
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Borsato, L.
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Alonso, R.
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Anglada, G.
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Asquier, J.
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Davies, M.B.
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Barros, S.C.C.
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Bárczy, T.
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Baumjohann, W.
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Beck, M.
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Beck, T.
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Benz, W.
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Billot, N.
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Biondi, F.
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Bonfils, X.
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Buder, M.
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Cabrera, J.
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Cessa, V.
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Charnoz, S.
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Csizmadia, Szila ...
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Cubillos, P. E.
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Davies, Melvyn B ...
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Deleuil, M.
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Demangeon, O.
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Demory, B.O.
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Ehrenreich, D.
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Erikson, Anders
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Van Eylen, Vince ...
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Fortier, A.
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Fridlund, Malcol ...
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Gillon, Michaël
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Van Grootel, V.
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Gudel, M.
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Günther, Maximil ...
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Hoyer, S.
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Isaak, K.
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Kiss, L.
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Kristiansen, M. ...
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Laskar, J.
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des Etangs, A. L ...
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Lovis, C.
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Luntzer, A.
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Magrin, D.
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Maxted, P.
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Mordasini, C.
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Nascimbeni, Vale ...
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Olofsson, G.
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Ottensamer, R.
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Pagano, I.
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Palle, E.
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Peter, G.
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Piotto, Giampaol ...
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Pollacco, Don L.
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Queloz, D.
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Ragazzoni, Rober ...
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Rando, N.
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Rauer, H.
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Ribas, I.
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Santos, N. C.
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Scandariato, Gae ...
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Segransan, D.
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Simon, A.E.
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Smith, A. M.S.
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Steller, Manfred ...
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Szabó, G.M.
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Thomas, Nicolas
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Udry, S.
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Venturini, J.
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Walton, N. A.
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Chalmers University of Technology
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Lund University