Article (Scientific journals)
WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered
Hebb, L.; Collier-Cameron, A.; Triaud, A H M J et al.
2010In Astrophysical Journal, 708, p. 224-231
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Keywords :
planetary systems; techniques: photometric; techniques: radial velocities
Abstract :
[en] We report on the discovery of a new extremely short period transiting extrasolar planet, WASP-19b. The planet has mass M [SUB]pl[/SUB] = 1.15 ± 0.08 M[SUB]J[/SUB] , radius R [SUB]pl[/SUB] = 1.31 ± 0.06 R[SUB]J[/SUB] , and orbital period P = 0.7888399 ± 0.0000008 days. Through spectroscopic analysis, we determine the host star to be a slightly super-solar metallicity ([M/H] = 0.1 ± 0.1 dex) G-dwarf with T [SUB]eff[/SUB] = 5500 ± 100 K. In addition, we detect periodic, sinusoidal flux variations in the light curve which are used to derive a rotation period for the star of P [SUB]rot[/SUB] = 10.5 ± 0.2 days. The relatively short stellar rotation period suggests that either WASP-19 is somewhat young (~ 600 Myr old) or tidal interactions between the two bodies have caused the planet to spiral inward over its lifetime resulting in the spin-up of the star. Due to the detection of the rotation period, this system has the potential to place strong constraints on the stellar tidal quality factor, Q'[SUB] s [/SUB], if a more precise age is determined.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Hebb, L.;  School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK
Collier-Cameron, A.;  School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK
Triaud, A H M J;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
Lister, T. A.;  Las Cumbres Observatory, 6740 Cortona Dr. Suite 102, Santa Barbara, CA 93117, USA
Smalley, B.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Maxted, P. F. L.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Hellier, C.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Anderson, D. R.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Pollacco, D.;  Astrophysics Research Centre, School of Mathematics & Physics, Queen's University, University Road, Belfast, BT7 1NN, UK
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Queloz, D.;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
West, R. G.;  Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK
Bentley, S.;  Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
Enoch, B.;  School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK
Haswell, C. A.;  Department of Physics and Astronomy, The Open University, Milton Keynes, MK7 6AA, UK
Horne, K.;  School of Physics and Astronomy, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9SS, UK
Mayor, M.;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
Pepe, F.;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
Segransan, D.;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
Skillen, I.;  Isaac Newton Group of Telescopes, Apartado de Correos 321, E-38700 Santa Cruz de la Palma, Tenerife, Spain
Udry, S.;  Observatoire de Genève, Université de Genève, 51 Ch. des Maillettes, 1290 Sauverny, Switzerland
Wheatley, P. J.;  Department of Physics, University of Warwick, Coventry CV4 7AL, UK
More authors (12 more) Less
Language :
English
Title :
WASP-19b: The Shortest Period Transiting Exoplanet Yet Discovered
Publication date :
01 January 2010
Journal title :
Astrophysical Journal
ISSN :
0004-637X
eISSN :
1538-4357
Publisher :
University of Chicago Press, Chicago, United States - Illinois
Volume :
708
Pages :
224-231
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/1001.0403
Available on ORBi :
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