Open AccessExtrasolar planets around HD 196050, HD 216437 and HD 160691
Author(s) -
Jones Hugh R. A.,
Paul Butler R.,
Marcy Geoffrey W.,
Tinney Chris G.,
Penny Alan J.,
McCarthy Chris,
Carter Brad D.
Publication year - 2002
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2002.05787.x
Subject(s) - physics , planet , stars , exoplanet , astrophysics , minimum mass , planetary system , astronomy , o type main sequence star , eccentricity (behavior) , k type main sequence star , t tauri star , political science , law
We report precise Doppler measurements of the stars HD 216437, HD 196050 and HD 160691 obtained with the Anglo‐Australian Telescope using the UCLES spectrometer together with an iodine cell as part of the Anglo‐Australian Planet Search. Our measurements reveal periodic Keplerian velocity variations that we interpret as evidence for planets in orbit around these solar type stars. HD 216437 has a period of 1294 ± 250 d , a semi‐amplitude of 38 ± 3 m s −1 and an eccentricity of 0.33 ± 0.09 . The minimum ( M sin i ) mass of the companion is 2.1 ± 0.3 M JUP and the semi‐major axis is 2.4 ± 0.5 au . HD 196050 has a period of 1300 ± 230 d , a semi‐amplitude of 49 ± 8 m s −1 and an eccentricity of 0.19 ± 0.09 . The minimum mass of the companion is 2.8 ± 0.5 M JUP and the semi‐major axis is 2.4 ± 0.5 au . We also report further observations of the metal‐rich planet bearing star HD 160691. Our new solution confirms the previously reported planet and shows a trend indicating a second, longer‐period companion. These discoveries add to the growing numbers of mildly eccentric, long‐period extrasolar planets around metal‐rich Sun‐like stars.