Reference : WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/176451
WASP-94 A and B planets: hot-Jupiter cousins in a twin-star system
English
Neveu-VanMalle, M. [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland <EMAIL>marion.neveu@unige.ch</EMAIL>; Cavendish Laboratory, J J Thomson Avenue, Cambridge, CB3 0HE, UK]
Queloz, D. [Cavendish Laboratory, J J Thomson Avenue, Cambridge, CB3 0HE, UK; Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
Anderson, D. R. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Charbonnel, C. [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
Collier Cameron, A. [SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, Fife, KY16 9SS, UK]
Delrez, Laetitia mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Gillon, Michaël mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Hellier, C. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Jehin, Emmanuel mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Lendl, Monika mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Origines Cosmologiques et Astrophysiques (OrCa) >]
Maxted, P. F. L. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Pepe, F. [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
Pollacco, D. [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK]
Ségransan, D. [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
Smalley, B. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Smith, A. M. S. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK; N. Copernicus Astronomical Centre, Polish Academy of Sciences, Bartycka 18, 00-716, Warsaw, Poland]
Southworth, J. [Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK]
Triaud, A. H. M. J. [Kavli Institute for Astrophysics & Space Research, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA; Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
Udry, S. [Observatoire Astronomique de l'Université de Genève, Chemin des Maillettes 51, 1290, Sauverny, Switzerland]
West, R. G. [Department of Physics, University of Warwick, Gibbet Hill Road, Coventry, CV4 7AL, UK)]
1-Dec-2014
Astronomy and Astrophysics
572
49
Yes
International
[en] planetary systems ; stars: individual: WASP-94 ; techniques: photometric ; techniques: radial velocities ; techniques: spectroscopic ; binaries: visual
[en] We report the discovery of two hot-Jupiter planets, each orbiting one of the stars of a wide binary system. <ASTROBJ>WASP-94A</ASTROBJ> (<ASTROBJ>2MASS 20550794-3408079</ASTROBJ>) is an F8 type star hosting a transiting planet with a radius of 1.72 ± 0.06 R<SUB>Jup</SUB>, a mass of 0.452 ± 0.034 M<SUB>Jup</SUB>, 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. <ASTROBJ>WASP-94B</ASTROBJ> (<ASTROBJ>2MASS 20550915-3408078</ASTROBJ>) 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 M<SUB>Jup</SUB> 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. The radial-velocity and photometric data used for this work are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (ftp://130.79.128.5) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/572/A49">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/572/A49</A>
Researchers
http://hdl.handle.net/2268/176451
10.1051/0004-6361/201424744
http://adsabs.harvard.edu/abs/2014A%26A...572A..49N

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