Astronomy and Astrophysics, volume 551A, 90-90 (2013/3-1)
The CORALIE survey for southern extrasolar planets. XVII. New and updated long period and massive planets.
MARMIER M., SEGRANSAN D., UDRY S., MAYOR M., PEPE F., QUELOZ D., LOVIS C., NAEF D., SANTOS N.C., ALONSO R., ALVES S., BERTHET S., CHAZELAS B., DEMORY B.-O., DUMUSQUE X., EGGENBERGER A., FIGUEIRA P., GILLON M., HAGELBERG J., LENDL M., MARDLING R.A., MEGEVAND D., NEVEU M., SAHLMANN J., SOSNOWSKA D., TEWES M. and TRIAUD A.H.M.J.
Abstract (from CDS):
Since 1998, a planet-search program around main sequence stars within 50pc in the southern hemisphere has been carried out with the CORALIE echelle spectrograph at La Silla Observatory. 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. Long-term precise Doppler measurements with the CORALIE echelle spectrograph, together with a few additional observations made with the HARPS spectrograph on the ESO 3.6m telescope, reveal radial velocity signatures of massive planetary companions on long-period orbits. In this paper we present seven new planets orbiting HD27631, HD98649, HD106515A, HD166724, HD196067, HD219077, and HD220689, together with the CORALIE orbital parameters for three already known planets around HD10647, HD30562, and HD86226. The period range of the new planetary companions goes from 2200 to 5500 days and covers a mass domain between 1 and 10.5MJup. Surprisingly, five of them present very high eccentricities above e>0.57. A pumping scenario by Kozai mechanism may be invoked for HD106515Ab and HD196067b, which are both orbiting stars in multiple systems. Since the presence of a third massive body cannot be inferred from the data of HD98649b, HD166724b, and HD219077b, the origin of the eccentricity of these systems remains unknown. Except for HD10647b, 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.
planetary systems - binaries: visual - techniques: radial velocities - stars: general
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