Neveu-VanMalle, M, Queloz, D, Anderson, DR, Charbonnel, C, Cameron, AC, Delrez, L, Gillon, M, Hellier, C, Jehin, E, Lendl, M, Maxted, PFL, Pepe, F, Pollacco, D, Segransan, D, Smalley, B, Smith, AMS, Southworth, J, Triaud, AHMJ, Udry, S and West, RG (2014) WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system. Astronomy & Astrophysics, 572. ISSN 0004-6361

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We report the discovery of two hot-Jupiter planets, each orbiting one of the stars of a wide binary system. WASP-94A (2MASS 20550794–3408079) is an F8 type star hosting a transiting planet with a radius of 1.72 ± 0.06 RJup, a mass of 0.452 ± 0.034 MJup, and an orbital period of 3.95 days. The Rossiter-McLaughlin effect is clearly detected, and the measured projected spin-orbit angle indicates that the planet occupies a retrograde orbit. WASP-94B (2MASS 20550915–3408078) is an F9 stellar companion at an angular separation of 15′′ (projected separation 2700 au), hosting a gas giant with a minimum mass of 0.618 ± 0.028 MJup with a period of 2.008 days, detected by Doppler measurements. The orbital planes of the two planets are inclined relative to each other, indicating that at least one of them is inclined relative to the plane of the stellar binary. These hot Jupiters in a binary system bring new insights into the formation of close-in giant planets and the role of stellar multiplicity.

Item Type: Article
Additional Information: ©EDP Sciences
Uncontrolled Keywords: planetary systems, stars: individual: WASP-94, techniques: photometric, techniques: radial velocities, techniques: spectroscopic, binaries: visual
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Divisions: Faculty of Natural Sciences > School of Physical and Geographical Sciences
Related URLs:
Depositing User: Symplectic
Date Deposited: 08 Jul 2015 08:47
Last Modified: 15 May 2019 09:39

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