Article (Scientific journals)
High-resolution imaging of transiting extrasolar planetary systems (HITEP) II. Lucky imaging results from 2015 and 2016
Evans, D. F.; Southworth, J.; Smalley, B. et al.
2018In Astronomy and Astrophysics, 610
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Keywords :
Dynamical evolution and stability - planets and satellites; Formation -Techniques; High angular resolution - binaries; Planets and satellites; Visual; Bins; Extrasolar planets; Orbits; Photometry; Planets; Satellites; Surveys; High angular resolutions; High-resolution imaging; Historical measurements; Relative positions; Southern Hemisphere; Stars
Abstract :
[en] Context. The formation and dynamical history of hot Jupiters is currently debated, with wide stellar binaries having been suggested as a potential formation pathway. Additionally, contaminating light from both binary companions and unassociated stars can significantly bias the results of planet characterisation studies, but can be corrected for if the properties of the contaminating star are known. Aims. We search for binary companions to known transiting exoplanet host stars, in order to determine the multiplicity properties of hot Jupiter host stars. We also search for and characterise unassociated stars along the line of sight, allowing photometric and spectroscopic observations of the planetary system to be corrected for contaminating light. Methods. We analyse lucky imaging observations of 97 Southern hemisphere exoplanet host stars, using the Two Colour Instrument on the Danish 1.54 m telescope. For each detected companion star, we determine flux ratios relative to the planet host star in two passbands, and measure the relative position of the companion. The probability of each companion being physically associated was determined using our two-colour photometry. Results. A catalogue of close companion stars is presented, including flux ratios, position measurements, and estimated companion star temperature. For companions that are potential binary companions, we review archival and catalogue data for further evidence. For WASP-77AB and WASP-85AB, we combine our data with historical measurements to determine the binary orbits, showing them to be moderately eccentric and inclined to the line of sight (and hence planetary orbital axis). Combining our survey with the similar Friends of Hot Jupiters survey, we conclude that known hot Jupiter host stars show a deficit of high mass stellar companions compared to the field star population; however, this may be a result of the biases in detection and target selection by ground-based surveys. ©ESO 2018.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Evans, D. F.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Southworth, J.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Smalley, B.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, United Kingdom
Jørgensen, U. G.;  Centre for Star and Planet Formation, Niels Bohr Institute, University of Copenhagen ØSter Voldgade 5, Copenhagen, 1350, Denmark
Dominik, M.;  Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St.Andrews, North Haugh, St.Andrews, KY16 9SS, United Kingdom
Andersen, M. I.;  Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen, 2100, Denmark
Bozza, V.;  Dipartimento di Fisica E.R. Caianiello, Universita di Salerno, via Giovanni Paolo II 132, Fisciano, 84084, Italy, Sezione di Napoli, Istituto Nazionale di Fisica Nucleare, Napoli, 80126, Italy
Bramich, D. M.
Burgdorf, M. J.;  Department of Mathematics, Informatics and Natural Sciences, Meteorological Institute, Universität Hamburg, Bundesstraße 55, Hamburg, 20146, Germany
Ciceri, S.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, 69117, Germany
D'Ago, G.;  INAF-Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, Napoli, 80131, Italy
Jaimes, R. F.;  Centre for Exoplanet Science, SUPA School of Physics and Astronomy, University of St.Andrews, North Haugh, St.Andrews, KY16 9SS, United Kingdom, European Southern Observatory, Karl-Schwarzschild Straße 2, Garching bei München, 85748, Germany
Gu, S.-H.;  Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China, Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China
Hinse, T. C.;  Korea Astronomy and Space Science Institute, 776 Daedukdae-ro, Yuseong-gu, Daejeon, 305-348, South Korea
Henning, Th;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, 69117, Germany
Hundertmark, M.;  Astronomisches Rechen-Institut, Zentrum Für Astronomie Der Universität Heidelberg, Mönchhofstr. 12-14, Heidelberg, 69120, Germany
Kains, N.;  Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, United States
Kerins, E.;  Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
Korhonen, H.;  Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, Copenhagen, 2100, Denmark, Finnish Centre for Astronomy with ESO (FINCA), Väisäläntie 20, Piikkiö, 21500, Finland
Kokotanekova, R.;  Max Planck Institute for Solar System Research, Justus-von-Liebig- Weg 3, Göttingen, 37077, Germany, Department of Science, Technology, Engineering and Mathematics, Walton Hall, Open University, Milton Keynes, MK7 6AA, United Kingdom
Kuffmeier, M.;  Centre for Star and Planet Formation, Niels Bohr Institute, University of Copenhagen ØSter Voldgade 5, Copenhagen, 1350, Denmark
Longa-Peña, P.;  Fac. de Ciencias Básicas, Unidad de Astronomía, Universidad de Antofagasta, Avda. U. de Antofagasta, Antofagasta, 02800, Chile
Mancini, L.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, 69117, Germany, Department of Physics, University of Rome Tor Vergata, via della Ricerca Scientifica 1, Roma, 00133, Italy, INAF - Astrophysical Observatory of Turin, via Osservatorio 20, Pino Torinese, 10025, Italy
MacKenzie, J.;  Centre for Star and Planet Formation, Niels Bohr Institute, University of Copenhagen ØSter Voldgade 5, Copenhagen, 1350, Denmark
Popovas, A.;  Centre for Star and Planet Formation, Niels Bohr Institute, University of Copenhagen ØSter Voldgade 5, Copenhagen, 1350, Denmark
Rabus, M.;  Max Planck Institute for Astronomy, Königstuhl 17, Heidelberg, 69117, Germany, Facultad de Física, Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuna Mackenna 4860, Macul, Santiago, 7820436, Chile
Rahvar, S.;  Department of Physics, Sharif University of Technology, PO Box 11155, Tehran, 9161, Iran
Sajadian, S.;  Department of Physics, Isfahan University of Technology, Isfahan, 84156- 83111, Iran
Snodgrass, C.;  Department of Science, Technology, Engineering and Mathematics, Walton Hall, Open University, Milton Keynes, MK7 6AA, United Kingdom
Skottfelt, J.;  Department of Science, Technology, Engineering and Mathematics, Walton Hall, Open University, Milton Keynes, MK7 6AA, United Kingdom
Surdej, Jean  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Département d'astrophys., géophysique et océanographie (AGO)
Tronsgaard, R.;  Department of Physics and Astronomy, Stellar Astrophysics Centre, Aarhus University, Ny Munkegade 120, Aarhus C, 8000, Denmark
Unda-Sanzana, E.;  Fac. de Ciencias Básicas, Unidad de Astronomía, Universidad de Antofagasta, Avda. U. de Antofagasta, Antofagasta, 02800, Chile
Von Essen, C.;  Department of Physics and Astronomy, Stellar Astrophysics Centre, Aarhus University, Ny Munkegade 120, Aarhus C, 8000, Denmark
Wang, Y.-B.;  Yunnan Observatories, Chinese Academy of Sciences, Kunming, 650011, China, Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming, 650011, China
Wertz, O.;  Argelander-Institut Für Astronomie, Auf dem Hügel, 71, Bonn, 53121, Germany
More authors (26 more) Less
Language :
English
Title :
High-resolution imaging of transiting extrasolar planetary systems (HITEP) II. Lucky imaging results from 2015 and 2016
Publication date :
2018
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences
Volume :
610
Peer reviewed :
Peer Reviewed verified by ORBi
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