Reference : WASP-54b, WASP-56b and WASP-57b: Three new sub-Jupiter mass planets from SuperWASP
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/135084
WASP-54b, WASP-56b and WASP-57b: Three new sub-Jupiter mass planets from SuperWASP
English
Faedi, F. mailto [> >]
Pollacco, D. [> >]
Barros, S. C. C. [> >]
Brown, D. [> >]
Collier Cameron, A. [> >]
Doyle, A. P. [> >]
Gillon, Michaël mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Gomez Maqueo Chew, Y. [> >]
Hebrard, G. [> >]
Lendl, M. [> >]
Liebig, C. [> >]
Smalley, B. [> >]
Triaud, A. H. M. J. [> >]
West, R. G. [> >]
Wheatley, P. J. [> >]
Alsubai, K. A. [> >]
Anderson, D. R. [> >]
Armstrong, D. J. [> >]
Bento, J. [> >]
Bochinski, J. [> >]
Bouchy, F. [> >]
Busuttil, R. [> >]
Fossati, L. [> >]
Fumel, Aurélie [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Haswell, C. A. [> >]
Hellier, C. [> >]
Holmes, S. [> >]
Jehin, Emmanuel mailto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image >]
Kolb, U. [> >]
McCormac, J. [> >]
Miller, G. R. M. [> >]
Moutou, C. [> >]
Norton, A. J. [> >]
Parley, N. [> >]
Queloz, D. [> >]
Skillen, I. [> >]
Smith, A. M. S. [> >]
Udry, S. [> >]
Watson, C. [> >]
1-Mar-2013
Astronomy and Astrophysics
EDP Sciences
551
73
Yes (verified by ORBi)
International
0004-6361
1432-0746
Les Ulis
France
[en] Astrophysics - Earth and Planetary Astrophysics ; Astrophysics - Solar and Stellar Astrophysics
[en] We present three newly discovered sub-Jupiter mass planets from the SuperWASP survey: WASP-54b is a heavily bloated planet of mass 0.636+0.025-0.024RJ. It orbits a F9 star, evolving off the main sequence, every 3.69 days. Our MCMC fit of the system yields a slightly eccentric orbit (e = 0.067+0.033-0.025) for WASP-54b. We investigated further the veracity of our detection of the eccentric orbit for WASP-54b, and we find that it could be real. However, given the brightness of WASP-54 V = 10.42 mag, we encourage observations of a secondary eclipse to draw robust conclusions on both the orbital eccentricity and the thermal structure of the planet. WASP-56b and WASP-57b have masses of 0.571+0.034-0.035MJ and 0.672+0.049-0.046MJ, respectively; and radii of 1.092+0.035-0.033RJ for WASP-56b and 0.916+0.017-0.014RJ for WASP-57b. They orbit main sequence stars of spectral type G6 every 4.67 and 2.84 days, respectively. WASP-56b and WASP-57b show no radius anomaly and a high density possibly implying a large core of heavy elements; possibly as high as ~50 M⊕ in the case of WASP-57b. However,the composition of the deep interior of exoplanets remains still undetermined. Thus, more exoplanet discoveries such as the ones presented in this paper, are needed to understand and constrain giant planets' physical properties.
http://hdl.handle.net/2268/135084
http://adsabs.harvard.edu/abs/2013A%26A...551A..73F

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