Reference : WASP-189b: an ultra-hot Jupiter transiting the bright A star HR 5599 in a polar orbit
E-prints/Working papers : Already available on another site
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/233288
WASP-189b: an ultra-hot Jupiter transiting the bright A star HR 5599 in a polar orbit
English
Anderson, D. R. mailto [> >]
Temple, L. Y. [> >]
Nielsen, L. D. [> >]
Burdanov, Artem mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Hellier, C. [> >]
Bouchy, F. [> >]
Brown, D. J. A. [> >]
Collier Cameron, A. [> >]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Exotic >]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Maxted, P. F. L. [> >]
Pepe, F. [> >]
Pollacco, D. [> >]
Pozuelos, F. J. [> >]
Queloz, D. [> >]
Ségransan, D. [> >]
Smalley, B. [> >]
Triaud, A. H. M. J. [> >]
Turner, O. D. [> >]
Udry, S. [> >]
West, R. G. [> >]
1-Sep-2018
No
[en] Astrophysics - Earth and Planetary Astrophysics
[en] We report the discovery of WASP-189b: an ultra-hot Jupiter in a 2.72-d transiting orbit around the $V = 6.6$ A star WASP-189 (HR 5599). We detected periodic dimmings in the star's lightcurve, first with the WASP-South survey facility then with the TRAPPIST-South telescope. We confirmed that a planet is the cause of those dimmings via line-profile tomography and radial-velocity measurements using the HARPS and CORALIE spectrographs. Those reveal WASP-189b to be an ultra-hot Jupiter ($M_{\rm P}$ = 2.13 $\pm$ 0.28 $M_{\rm Jup}$; $R_{\rm P}$ = 1.374 $\pm$ 0.082 $R_{\rm Jup}$) in a polar orbit ($\lambda = 89.3 \pm 1.4^\circ$; $\Psi = 90.0 \pm 5.8^\circ$) around a rapidly rotating A6IV-V star ($T_{\rm eff}$ = 8000 $\pm$ 100 K; $v_* \sin i_*$ $\approx$ 100 km\, s$^{-1}$). We calculate a predicted equilibrium temperature of $T_{\rm eql}$ = 2641 $\pm$ 34 K, assuming zero albedo and efficient redistribution, which is the third hottest for the known exoplanets. WASP-189 is the brightest known host of a transiting hot Jupiter and the third-brightest known host of any transiting exoplanet. We note that of the eight hot-Jupiter systems with $T_{\rm eff}$ $>$ 7000 K, seven have strongly misaligned orbits, and two of the three systems with $T_{\rm eff}$ $\geq$ 8000 K have polar orbits (the third is aligned).
http://hdl.handle.net/2268/233288
http://adsabs.harvard.edu/abs/2018arXiv180904897A
Submitted to MNRAS. 10 pages, 9 figures, 3 tables
https://arxiv.org/pdf/1809.04897.pdf

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