Article (Scientific journals)
The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313
Segransan, D.; Udry, S.; Mayor, M. et al.
2010In Astronomy and Astrophysics, 511, p. 45
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Keywords :
planetary systems; binaries: visual; techniques: radial velocities; stars: individual: HD 147018; stars: individual: HD 171238; stars: individual: HD 204313
Abstract :
[en] We report the detection of a double planetary system around HD 140718 as well as the discovery of two long period and massive planets orbiting HD 171238 and HD 204313. Those discoveries were made with the CORALIE Echelle spectrograph mounted on the 1.2-m Euler Swiss telescope located at La Silla Observatory, Chile. The planetary system orbiting the nearby G9 dwarf HD 147018 is composed of an eccentric inner planet (e = 0.47) with twice the mass of Jupiter (2.1 MJup) and with an orbital period of 44.24 days. The outer planet is even more massive (6.6 MJup) with a slightly eccentric orbit (e = 0.13) and a period of 1008 days. The planet orbiting HD 171238 has a minimum mass of 2.6 MJup, a period of 1523 days and an eccentricity of 0.40. It orbits a G8 dwarfs at 2.5 AU. The last planet, <ASTROBJ>HD 204313</ASTROBJ> b, is a 4.0 M[SUB]Jup[/SUB]-planet with a period of 5.3 years and has a low eccentricity (e = 0.13). It orbits a G5 dwarfs at 3.1 AU. The three parent stars are metal rich, which further strengthens the case that massive planets tend to form around metal rich stars.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Segransan, D.
Udry, S.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Mayor, M.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Naef, D.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Pepe, F.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Queloz, D.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Santos, N. C.;  Centro de Astrofísica da Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal ; Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Demory, B.-O.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Figueira, P.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Marmier, M.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Mégevand, D.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Sosnowska, D.;  Laboratoire d'astrophysique, Ecole Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, 1290 Versoix, Switzerland
Tamuz, O.;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
Triaud, A H M J;  Observatoire astronomique de l'Université de Genève, 51 ch. des Maillettes, Sauverny, 1290 Versoix, Switzerland
More authors (5 more) Less
Language :
English
Title :
The CORALIE survey for southern extrasolar planets. XVI. Discovery of a planetary system around HD 147018 and of two long period and massive planets orbiting HD 171238 and HD 204313
Publication date :
01 February 2010
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
511
Pages :
45
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/0908.1479
Available on ORBi :
since 15 January 2010

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