Bibcode
Triaud, A. H. M. J.; Tewes, M.; Sosnowska, D.; Sahlmann, J.; Neveu, M.; Mégevand, D.; Mardling, R. A.; Lendl, M.; Hagelberg, J.; Gillon, M.; Figueira, P.; Eggenberger, A.; Dumusque, X.; Demory, B.-O.; Chazelas, B.; Berthet, S.; Alves, S.; Alonso, R.; Santos, N. C.; Naef, D.; Lovis, C.; Queloz, D.; Pepe, F.; Mayor, M.; Udry, S.; Ségransan, D.; Marmier, M.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 551, id.A90, 13 pp.
Fecha de publicación:
3
2013
Revista
Número de citas
63
Número de citas referidas
57
Descripción
Context. Since 1998, a planet-search program around main sequence stars
within 50 pc in the southern hemisphere has been carried out with the
CORALIE echelle spectrograph at La Silla Observatory. Aims: With
an observing time span of more than 14 years, the CORALIE survey is now
able to unveil Jovian planets on Jupiter's period domain. This growing
period-interval coverage is important for building formation and
migration models since observational constraints are still weak for
periods beyond the ice line. Methods: Long-term precise Doppler
measurements with the CORALIE echelle spectrograph, together with a few
additional observations made with the HARPS spectrograph on the ESO 3.6
m telescope, reveal radial velocity signatures of massive planetary
companions on long-period orbits. Results: In this paper we
present seven new planets orbiting HD 27631, HD 98649, HD 106515A, HD
166724, HD 196067, HD 219077, and HD 220689, together with the CORALIE
orbital parameters for three already known planets around HD 10647, HD
30562, and HD 86226. The period range of the new planetary companions
goes from 2200 to 5500 days and covers a mass domain between 1 and 10.5
MJup. Surprisingly, five of them present very high
eccentricities above e > 0.57. A pumping scenario by Kozai mechanism
may be invoked for HD 106515Ab and HD 196067b, which are both orbiting
stars in multiple systems. Since the presence of a third massive body
cannot be inferred from the data of HD 98649b, HD 166724b, and HD
219077b, the origin of the eccentricity of these systems remains
unknown. Except for HD 10647b, no constraint on the upper mass of the
planets is provided by Hipparcos astrometric data. Finally, the hosts of
these long period planets show no metallicity excess.
The CORALIE radial velocity measurements discussed in this paper are
only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/551/A90Based
on observations collected with the CORALIE echelle spectrograph mounted
on the 1.2 m Swiss telescope at La Silla Observatory and with the HARPS
spectrograph on the ESO 3.6 m telescope at La Silla (ESO, Chile).
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