Article (Scientific journals)
The LEECH Exoplanet Imaging Survey. Further constraints on the planet architecture of the HR 8799 system
Maire, Anne-Lise; Skemer, A. J.; Hinz, P. M. et al.
2015In Astronomy and Astrophysics, 576
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Keywords :
stars: individual: HR 8799; planetary systems; instrumentation: adaptive optics; methods: data analysis; techniques: high angular resolution; planets and satellites: dynamical evolution and stability
Abstract :
[en] Context. Astrometric monitoring of directly imaged exoplanets allows the study of their orbital parameters and system architectures. Because most directly imaged planets have long orbital periods (>20 AU), accurate astrometry is challenging when based on data acquired on timescales of a few years and usually with different instruments. The LMIRCam camera on the Large Binocular Telescope is being used for the LBT Exozodi Exoplanet Common Hunt (LEECH) survey to search for and characterize young and adolescent exoplanets in L' band (3.8 μm), including their system architectures. <BR /> Aims: We first aim to provide a good astrometric calibration of LMIRCam. Then, we derive new astrometry, test the predictions of the orbital model of 8:4:2:1 mean motion resonance proposed for the system, and perform new orbital fitting of the HR 8799 bcde planets. We also present deep limits on a putative fifth planet inside the known planets. <BR /> Methods: We use observations of HR 8799 and the Θ[SUP]1[/SUP] Ori C field obtained during the same run in October 2013. <BR /> Results: We first characterize the distortion of LMIRCam. We determine a platescale and a true north orientation for the images of 10.707 ± 0.012 mas/pix and -0.430 ± 0.076°, respectively. The errors on the platescale and true north orientation translate into astrometric accuracies at a separation of 1'' of 1.1 mas and 1.3 mas, respectively. The measurements for all planets agree within 3σ with a predicted ephemeris. The orbital fitting based on the new astrometric measurements favors an architecture for the planetary system based on 8:4:2:1 mean motion resonance. The detection limits allow us to exclude a fifth planet slightly brighter or more massive than HR 8799 b at the location of the 2:1 resonance with HR 8799 e (~9.5 AU) and about twice as bright as HR 8799 cde at the location of the 3:1 resonance with HR 8799 e (~7.5 AU). The LBT is an international collaboration among institutions in the United States, Italy, and Germany. LBT Corporation partners are: The University of Arizona on behalf of the Arizona university system; Istituto Nazionale di Astrofisica, Italy; LBT Beteiligungsgesellschaft, Germany, representing the Max-Planck Society, the Astrophysical Institute Potsdam, and Heidelberg University; The Ohio State University, and The Research Corporation, on behalf of The University of Notre Dame, University of Minnesota, and University of Virginia.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Maire, Anne-Lise ;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Skemer, A. J.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Hinz, P. M.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Desidera, S.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Esposito, S.;  INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125, Firenze, Italy
Gratton, R.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Marzari, F.;  Dipartimento di Fisica e Astronomia, Universitá di Padova, via F. Marzolo 8, 35131, Padova, Italy
Skrutskie, M. F.;  Department of Astronomy, University of Virginia, Charlottesville, VA, 22904, USA
Biller, B. A.;  Institute for Astronomy, University of Edinburgh, Blackford Hill, Edinburgh, EH9 3HJ, UK ; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Defrere, Denis ;  Université de Liège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Bailey, V. P.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Leisenring, J. M.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Apai, D.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Bonnefoy, M.;  Université Grenoble Alpes, IPAG, 38000, Grenoble, France ; CNRS, IPAG, 38000, Grenoble, France ; Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Brandner, W.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Buenzli, E.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Claudi, R. U.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Close, L. M.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Crepp, J. R.;  Department of Physics, University of Notre Dame, 225 Nieuwland Science Hall, Notre Dame, IN, 46556, USA
De Rosa, R. J.;  Arizona State University, School of Earth and Space Exploration, PO Box 871404, Tempe, AZ, 85287-1404, USA ; Astrophysics group, School of Physics, University of Exeter, Stocker Road, Exeter, EX4 4QL, UK
Eisner, J. A.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Fortney, J. J.;  Department of Astronomy and Astrophysics, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
Henning, T.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany
Hofmann, K.-H.;  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, Germany
Kopytova, T. G.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; International Max Planck Research School for Astronomy and Space Physics, 69117, Heidelberg, Germany
Males, J. R.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Mesa, D.;  INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122, Padova, Italy
Morzinski, K. M.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Oza, A.;  Department of Astronomy, University of Virginia, Charlottesville, VA, 22904, USA
Patience, J.;  Arizona State University, School of Earth and Space Exploration, PO Box 871404, Tempe, AZ, 85287-1404, USA
Pinna, E.;  INAF-Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125, Firenze, Italy
Rajan, A.;  Arizona State University, School of Earth and Space Exploration, PO Box 871404, Tempe, AZ, 85287-1404, USA
Schertl, D.;  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, Germany
Schlieder, J. E.;  Max-Planck-Institut für Astronomie, Königstuhl 17, 69117, Heidelberg, Germany ; NASA Ames Research Center, M.S. 245-6, Moffett Field, CA, 94035, USA
Su, K. Y. L.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Vaz, A.;  Steward Observatory, Department of Astronomy, University of Arizona, 993 North Cherry Avenue, Tucson, AZ, 85721, USA
Ward-Duong, K.;  Arizona State University, School of Earth and Space Exploration, PO Box 871404, Tempe, AZ, 85287-1404, USA
Weigelt, G.;  Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121, Bonn, Germany
Woodward, C. E.;  Minnesota Institute for Astrophysics, University of Minnesota, 116 Church Street, SE, Minneapolis, MN, 55455, USA)
More authors (29 more) Less
Language :
English
Title :
The LEECH Exoplanet Imaging Survey. Further constraints on the planet architecture of the HR 8799 system
Publication date :
01 April 2015
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
576
Peer reviewed :
Peer Reviewed verified by ORBi
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