Orbital misalignment of the Neptune-mass exoplanet GJ 436b with the spin of its cool star

Vincent Bourrier (), Christophe Lovis, Hervé Beust, David Ehrenreich, Gregory W. Henry, Nicola Astudillo-Defru, Romain Allart, Xavier Bonfils, Damien Ségransan, Xavier Delfosse, Heather M. Cegla, Aurélien Wyttenbach, Kevin Heng, Baptiste Lavie and Francesco Pepe
Additional contact information
Vincent Bourrier: Observatoire de l’Université de Genève
Christophe Lovis: Observatoire de l’Université de Genève
Hervé Beust: Université Grenoble Alpes, CNRS, IPAG
David Ehrenreich: Observatoire de l’Université de Genève
Gregory W. Henry: Center of Excellence in Information Systems, Tennessee State University
Nicola Astudillo-Defru: Observatoire de l’Université de Genève
Romain Allart: Observatoire de l’Université de Genève
Xavier Bonfils: Université Grenoble Alpes, CNRS, IPAG
Damien Ségransan: Observatoire de l’Université de Genève
Xavier Delfosse: Université Grenoble Alpes, CNRS, IPAG
Heather M. Cegla: Observatoire de l’Université de Genève
Aurélien Wyttenbach: Observatoire de l’Université de Genève
Kevin Heng: University of Bern, Center for Space and Habitability
Baptiste Lavie: Observatoire de l’Université de Genève
Francesco Pepe: Observatoire de l’Université de Genève

Nature, 2018, vol. 553, issue 7689, 477-480

Abstract: Mapping the three-dimensional trajectory of a Neptune-mass exoplanet across the disk of its cool star reveals that its orbit is nearly perpendicular to the stellar equator, implying the existence of a yet-undetected outer companion planet.

Date: 2018
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DOI: 10.1038/nature24677

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