Reference : Unmasking the hidden NGTS-3Ab: A hot Jupiter in an unresolved binary system
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/230460
Unmasking the hidden NGTS-3Ab: A hot Jupiter in an unresolved binary system
English
Günther, M. N. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom]
Queloz, D. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom, Observatoire de Genève, Université deGenève, 51 Ch. desMaillettes, Sauverny, Switzerland]
Gillen, E. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom]
Delrez, L. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom]
Bouchy, F. [Observatoire de Genève, Université deGenève, 51 Ch. desMaillettes, Sauverny, Switzerland]
McCormac, J. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Smalley, B. [Astrophysics Group, Lennard-Jones Laboratories, Keele University, Staffordshire, United Kingdom]
Almleaky, Y. [Space and Astronomy Department, Faculty of Science, King Abdulaziz University, Jeddah, Saudi Arabia, King Abdullah Centre for Crescent Observations and Astronomy, Makkah Clock, Mecca, Saudi Arabia]
Armstrong, D. J. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Bayliss, D. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Burdanov, Artem mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Burleigh, M. [Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, United Kingdom]
Cabrera, J. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany]
Casewell, S. L. [Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, United Kingdom]
Cooke, B. F. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Csizmadia, S. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany]
Ducrot, Elsa mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Eigmüller, P. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany, Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, Berlin, Germany]
Erikson, A. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany]
Gänsicke, B. T. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Gibson, N. P. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast, United Kingdom]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Goad, M. R. [Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, United Kingdom]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Jenkins, J. S. [Departamento de Astronomía, Universidad de Chile, Casilla 36-D, Santiago, Chile, Centro de Astrofísica y Tecnologías Afines (CATA), Casilla 36-D, Santiago, Chile]
Louden, T. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Moyano, M. [Instituto de Astronomia, Angamos 0610, Antofagasta, Chile]
Murray, C. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom]
Pollacco, D. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Poppenhaeger, K. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast, United Kingdom]
Rauer, H. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany, Center for Astronomy and Astrophysics, TU Berlin, Hardenbergstr. 36, Berlin, Germany, Institute of Geological Sciences, FU Berlin, Malteserstr. 74-100, Berlin, Germany]
Raynard, L. [Department of Physics and Astronomy, Leicester Institute of Space and Earth Observation, University of Leicester, United Kingdom]
Smith, A. M. S. [Institute of Planetary Research, German Aerospace Center, Rutherfordstrasse 2, Berlin, Germany]
Sohy, Sandrine mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Thompson, S. J. [Astrophysics Group, Cavendish Laboratory, J.J. Thomson Avenue, Cambridge, United Kingdom]
Udry, S. [Observatoire de Genève, Université deGenève, 51 Ch. desMaillettes, Sauverny, Switzerland]
Watson, C. A. [Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, Belfast, United Kingdom]
West, R. G. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
Wheatley, P. J. [Department of Physics, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom, Centre for Exoplanets and Habitability, University ofWarwick, Gibbet Hill Road, Coventry, United Kingdom]
2018
Monthly Notices of the Royal Astronomical Society
Oxford University Press
478
4
4720-4737
Yes (verified by ORBi)
International
00358711
[en] Binaries: eclipsing ; Eclipses ; Occultations ; Planets and satellites: detection ; Surveys
[en] We present the discovery of NGTS-3Ab, a hot Jupiter found transiting the primary star of an unresolved binary system. We develop a joint analysis of multicolour photometry, centroids, radial velocity (RV) cross-correlation function (CCF) profiles, and their bisector inverse slopes (BIS) to disentangle this three-body system. Data from the Next Generation Transit Survey (NGTS), SPECULOOS and HARPS are analysed and modelled with our new BLENDFITTER software. We find that the binary consists of NGTS-3A (G6V-dwarf) and NGTS-3B (K1Vdwarf) at < 1 arcsec separation. NGTS-3Ab orbits every 1.675 d. The planet radius and mass are Rplanet = 1.48 ± 0.37 RJ and Mplanet = 2.38 ± 0.26MJ, suggesting it is potentially inflated. We emphasize that only combining all the information frommulticolour photometry, centroids and RV CCF profiles can resolve systems like NGTS-3. Such systems cannot be disentangled from single-colour photometry and RV measurements alone. Importantly, the presence of a BIS correlation indicates a blend scenario, but is not sufficient to determine which star is orbited by the third body. Moreover, even if no BIS correlation is detected, a blend scenario cannot be ruled out without further information. The choice of methodology for calculating the BIS can influence the measured significance of its correlation. The presented findings are crucial to consider for wide-field transit surveys, which require wide CCD pixels (> 5 arcsec) and are prone to contamination by blended objects. With TESS on the horizon, it is pivotal for the candidate vetting to incorporate all available follow-up information from multicolour photometry and RV CCF profiles. © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
Researchers ; Professionals
http://hdl.handle.net/2268/230460
10.1093/mnras/sty1193
http://adsabs.harvard.edu/abs/2018MNRAS.478.4720G

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