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WASP-128b : a transiting brown dwarf in the dynamical-tide regime
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dc.contributor.author | Hodžić, Vedad | |
dc.contributor.author | Triaud, Amaury H. M. J. | |
dc.contributor.author | Anderson, David R. | |
dc.contributor.author | Bouchy, François | |
dc.contributor.author | Cameron, Andrew Collier | |
dc.contributor.author | Delrez, Laetitia | |
dc.contributor.author | Gillon, Michaël | |
dc.contributor.author | Hellier, Coel | |
dc.contributor.author | Jehin, Emmanuël | |
dc.contributor.author | Lendl, Monika | |
dc.contributor.author | Maxted, Pierre F. L. | |
dc.contributor.author | Pepe, Francesco | |
dc.contributor.author | Pollacco, Don | |
dc.contributor.author | Queloz, Didier | |
dc.contributor.author | Ségransan, Damien | |
dc.contributor.author | Smalley, Barry | |
dc.contributor.author | Udry, Stéphane | |
dc.contributor.author | West, Richard | |
dc.date.accessioned | 2018-10-05T16:30:05Z | |
dc.date.available | 2018-10-05T16:30:05Z | |
dc.date.issued | 2018-12-21 | |
dc.identifier | 256087218 | |
dc.identifier | 6139c327-720c-4748-8ba5-3876b1825a7d | |
dc.identifier | 85057169320 | |
dc.identifier | 000454575100059 | |
dc.identifier.citation | Hodžić , V , Triaud , A H M J , Anderson , D R , Bouchy , F , Cameron , A C , Delrez , L , Gillon , M , Hellier , C , Jehin , E , Lendl , M , Maxted , P F L , Pepe , F , Pollacco , D , Queloz , D , Ségransan , D , Smalley , B , Udry , S & West , R 2018 , ' WASP-128b : a transiting brown dwarf in the dynamical-tide regime ' , Monthly Notices of the Royal Astronomical Society , vol. 481 , no. 4 , pp. 5091–5097 . https://doi.org/10.1093/mnras/sty2512 | en |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | BibCode: 2018MNRAS.tmp.2403H | |
dc.identifier.other | ORCID: /0000-0002-8863-7828/work/58531345 | |
dc.identifier.uri | https://hdl.handle.net/10023/16155 | |
dc.description.abstract | Massive companions in close orbits around G dwarfs are thought to undergo rapid orbital decay due to runaway tidal dissipation. We report here the discovery of WASP-128b, a brown dwarf discovered by the WASP survey transiting a G0V host on a 2.2 d orbit, where the measured stellar rotation rate places the companion in a regime where tidal interaction is dominated by dynamical tides. Under the assumption of dynamical equilibrium, we derive a value of the stellar tidal quality factor logQ′⋆=6.96 ± 0.19. A combined analysis of ground-based photometry and high-resolution spectroscopy reveals a mass and radius of the host, M⋆ = 1.16 ± 0.04 M⊙, R⋆ = 1.16 ± 0.02 R⊙, and for the companion, Mb = 37.5 ± 0.8Mj, Rb = 0.94 ± 0.02Rj, placing WASP-128b in the driest parts of the brown dwarf desert, and suggesting a mild inflation for its age. We estimate a remaining lifetime for WASP-128b similar to that of some ultra-short period massive hot Jupiters, and note it may be a propitious candidate for measuring orbital decay and testing tidal theories. | |
dc.format.extent | 680807 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | en |
dc.subject | Methods: data analysis | en |
dc.subject | Brown dwarfs | en |
dc.subject | Binaries: eclipsing | en |
dc.subject | Planets and satellites: dynamical evolution and stability | en |
dc.subject | QB Astronomy | en |
dc.subject | QC Physics | en |
dc.subject | NDAS | en |
dc.subject.lcc | QB | en |
dc.subject.lcc | QC | en |
dc.title | WASP-128b : a transiting brown dwarf in the dynamical-tide regime | en |
dc.type | Journal article | en |
dc.contributor.institution | University of St Andrews. School of Physics and Astronomy | en |
dc.contributor.institution | University of St Andrews. St Andrews Centre for Exoplanet Science | en |
dc.identifier.doi | 10.1093/mnras/sty2512 | |
dc.description.status | Peer reviewed | en |
dc.identifier.url | http://adsabs.harvard.edu/abs/2018MNRAS.tmp.2403H | en |
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