2006A&A...446..717D -
Astronomy and Astrophysics, volume 446717-722 (2006/2-1)
Elodie metallicity-biased search for transiting Hot Jupiters. I. Two Hot Jupiters orbiting the slightly evolved stars HD 118203 and HD 149143.
DA SILVA R., UDRY S., BOUCHY F., MAYOR M., MOUTOU C., PONT F., QUELOZ D., SANTOS N.C., SEGRANSAN D. and ZUCKER S.
Abstract (from CDS):
We report the discovery of a new planet candidate orbiting the subgiant star
HD118203 with a period of P=6.1335days. The best Keplerian solution yields an eccentricity e=0.31 and a minimum mass m
2sini=2.1M
Jup for the planet. This star has been observed with the ELODIE fiber-fed spectrograph as one of the targets in our planet-search programme biased toward high-metallicity stars, on-going since March 2004 at the Haute-Provence Observatory. An analysis of the spectroscopic line profiles using line bisectors revealed no correlation between the radial velocities and the line-bisector orientations, indicating that the periodic radial-velocity signal is best explained by the presence of a planet-mass companion. A linear trend is observed in the residuals around the orbital solution that could be explained by the presence of a second companion in a longer-period orbit. We also present here our orbital solution for another slightly evolved star in our metal-rich sample,
HD149143, recently proposed to host a 4-d period Hot Jupiter by the N2K consortium. Our solution yields a period P=4.09days, a marginally significant eccentricity e=0.08 and a planetary minimum mass of 1.36M
Jup. We checked that the shape of the spectral lines does not vary for this star as well.
Abstract Copyright:
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Journal keyword(s):
stars: individual: HD 118203 - stars: individual: HD 149143 - planetary systems - techniques: radial velocities
Simbad objects:
6
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