Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739

Details Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739 Two Jupiter-Mass Planets Orbiting HD 154672 and HD 205739

2008-09-05

arxiv.org/abs/0809.1037v1

Astronomy and Astrophysics

Astrophysics

16 pages, 5 figures, accepted for publication on AJ

Scientific paper

10.1088/0004-6256/136/5/1901

We report the detection of the first two planets from the N2K Doppler planet search program at the Magellan telescopes. The first planet has a mass of M sin i = 4.96 M_Jup and is orbiting the G3 IV star HD154672 with an orbital period of 163.9 days. The second planet is orbiting the F7 V star HD205739 with an orbital period of 279.8 days and has a mass of M sin i = 1.37 M_Jup. Both planets are in eccentric orbits, with eccentricities e = 0.61 and e = 0.27, respectively. Both stars are metal rich and appear to be chromospherically inactive, based on inspection of their Ca II H and K lines. Finally, the best Keplerian model fit to HD205739b shows a trend of 0.0649 m/s/day, suggesting the presence of an additional outer body in that system.

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