Bibcode
Rickman, E. L.; Ségransan, D.; Marmier, M.; Udry, S.; Bouchy, F.; Lovis, C.; Mayor, M.; Pepe, F.; Queloz, D.; Santos, N. C.; Allart, R.; Bonvin, V.; Bratschi, P.; Cersullo, F.; Chazelas, B.; Choplin, A.; Conod, U.; Deline, A.; Delisle, J.-B.; Dos Santos, L. A.; Figueira, P.; Giles, H. A. C.; Girard, M.; Lavie, B.; Martin, D.; Motalebi, F.; Nielsen, L. D.; Osborn, H.; Ottoni, G.; Raimbault, M.; Rey, J.; Roger, T.; Seidel, J. V.; Stalport, M.; Suárez Mascareño, A.; Triaud, A.; Turner, O.; Weber, L.; Wyttenbach, A.
Bibliographical reference
Astronomy and Astrophysics, Volume 625, id.A71, 16 pp.
Advertised on:
5
2019
Journal
Citations
33
Refereed citations
33
Description
Context. Since 1998, a planet-search around main sequence stars within
50 pc in the southern hemisphere has been underway with the CORALIE
spectrograph at La Silla Observatory. Aims: With an observing
time span of more than 20 yr, the CORALIE survey is able to detect
long-term trends in data with masses and separations large enough to
select ideal targets for direct imaging. Detecting these giant companion
candidates will allow us to start bridging the gap between
radial-velocity-detected exoplanets and directly imaged planets and
brown dwarfs. Methods: Long-term precise Doppler measurements
with the CORALIE spectrograph reveal radial-velocity signatures of
massive planetary companions and brown dwarfs on long-period orbits. Results: In this paper, we report the discovery of new companions
orbiting HD 181234, HD 13724, HD 25015, HD 92987 and HD 50499. We also
report updated orbital parameters for HD 50499b, HD 92788b and HD
98649b. In addition, we confirm the recent detection of HD 92788c. The
newly reported companions span a period range of 15.6-40.4 yr and a mass
domain of 2.93-26.77 MJup, the latter of which straddles the
nominal boundary between planets and brown dwarfs. Conclusions:
We report the detection of five new companions and updated parameters of
four known extrasolar planets. We identify at least some of these
companions to be promising candidates for imaging and further
characterisation.
The radial velocity measurements and additional data products discussed
in this paper are available on the DACE web platform at http://https://dace.unige.ch/radialVelocities.
See the appendix for a direct link to the individual target data
products. A copy of the data is also available at the CDS via anonymous
ftp to http://cdsarc.u-strasbg.fr
(ftp://130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/625/A71Based
on observations collected with the CORALIE 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).