Amaury H.M.J. Triaud
Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems
Triaud, Amaury H.M.J.; Neveu-VanMalle, Marion; Lendl, Monika; Anderson, David R.; Collier Cameron, Andrew; Delrez, Laetitia; Doyle, Amanda; Gillon, Michaël; Hellier, Coel; Jehin, Emmanuël; Maxted, Pierre F.L.; Ségransan, Damien; Smalley, Barry; Queloz, Didier; Pollacco, Don; Southworth, John; Tregloan-Reed, Jeremy; Udry, Stéphane; West, Richard
Authors
Marion Neveu-VanMalle
Monika Lendl
David R. Anderson
Andrew Collier Cameron
Laetitia Delrez
Amanda Doyle
Michaël Gillon
Coel Hellier c.hellier@keele.ac.uk
Emmanuël Jehin
Pierre Maxted p.maxted@keele.ac.uk
Damien Ségransan
Barry Smalley b.smalley@keele.ac.uk
Didier Queloz
Don Pollacco
Dr John Taylor j.k.taylor@keele.ac.uk
Jeremy Tregloan-Reed
Stéphane Udry
Richard West
Abstract
We report the detection of two new systems containing transiting planets. Both were identified by WASP as worthy transiting planet candidates. Radial velocity observations quickly verified that the photometric signals were indeed produced by two transiting hot Jupiters. Our observations also show the presence of additional Doppler signals. In addition to short-period hot Jupiters, we find that the WASP-53 and WASP-81 systems also host brown dwarfs, on fairly eccentric orbits with semimajor axes of a few astronomical units. WASP-53c is over 16 MJupsin?ic and WASP-81c is 57 MJupsin?ic. The presence of these tight, massive companions restricts theories of how the inner planets were assembled. We propose two alternative interpretations: the formation of the hot Jupiters within the snow line or the late dynamical arrival of the brown dwarfs after disc dispersal. We also attempted to measure the Rossiter–McLaughlin effect for both hot Jupiters. In the case of WASP-81b, we fail to detect a signal. For WASP-53b, we find that the planet is aligned with respect to the stellar spin axis. In addition we explore the prospect of transit-timing variations, and of using Gaia's astrometry to measure the true masses of both brown dwarfs and also their relative inclination with respect to the inner transiting hot Jupiters.
Citation
Triaud, A. H., Neveu-VanMalle, M., Lendl, M., Anderson, D. R., Collier Cameron, A., Delrez, L., …West, R. (2017). Peculiar architectures for the WASP-53 and WASP-81 planet-hosting systems. Monthly Notices of the Royal Astronomical Society, 467(2), 1714 - 1733. https://doi.org/10.1093/mnras/stx154
Journal Article Type | Article |
---|---|
Acceptance Date | Jan 17, 2017 |
Online Publication Date | Jan 22, 2017 |
Publication Date | 2017-05 |
Journal | Monthly Notices of the Royal Astronomical Society |
Print ISSN | 0035-8711 |
Publisher | Oxford University Press |
Peer Reviewed | Peer Reviewed |
Volume | 467 |
Issue | 2 |
Pages | 1714 - 1733 |
DOI | https://doi.org/10.1093/mnras/stx154 |
Keywords | planets and satellites, WASP-81, WASP-53, binaries, eclipsing, brown dwarfs, planetary systems |
Publisher URL | https://academic.oup.com/mnras/article-lookup/doi/10.1093/mnras/stx154 |
Files
2017MNRAS.467.1714T.pdf
(8.3 Mb)
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