Astrophys. J., 800, 22 (2015/February-2)
The California planet survey IV: a planet orbiting the giant star HD 145934 and updates to seven systems with long-period planets.
FENG Y.K., WRIGHT J.T., NELSON B., WANG S.X., FORD E.B., MARCY G.W., ISAACSON H. and HOWARD A.W.
Abstract (from CDS):
We present an update to seven stars with long-period planets or planetary candidates using new and archival radial velocities from Keck-HIRES and literature velocities from other telescopes. Our updated analysis better constrains orbital parameters for these planets, four of which are known multi-planet systems. HD 24040 b and HD 183263 c are super-Jupiters with circular orbits and periods longer than 8 yr. We present a previously unseen linear trend in the residuals of HD 66428 indicative of an additional planetary companion. We confirm that GJ 849 is a multi-planet system and find a good orbital solution for the c component: it is a 1 MJup planet in a 15 yr orbit (the longest known for a planet orbiting an M dwarf). We update the HD 74156 double-planet system. We also announce the detection of HD 145934 b, a 2 MJupplanet in a 7.5 yr orbit around a giant star. Two of our stars, HD 187123 and HD 217107, at present host the only known examples of systems comprising a hot Jupiter and a planet with a well constrained period greater than 5 yr, and with no evidence of giant planets in between. Our enlargement and improvement of long-period planet parameters will aid future analysis of origins, diversity, and evolution of planetary systems.
planetary systems - stars: individual: (HD 145934, GJ 849) - techniques: radial velocities
VizieR on-line data:
<Available at CDS (J/ApJ/800/22): table2.dat table3.dat table4.dat>
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