2008/09/05 by Mercedes Lopez-Morales, Mercedes López‐Morales, R. Paul Butler +9 · 2 citations
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics and Star Formation Studies #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1088/0004-6256/136/5/1901
16 pages, 5 figures, accepted for publication on AJ
arxiv created 2008/09/05 · openalex publication_date 2008/10/07 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01
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 orbits the G3 IV star HD 154672 with an orbital period of 163.9 days. The second planet orbits the F7 V star HD 205739 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 HD 205739b shows a trend of 0.0649 m s −1 day −1 , suggesting the presence of an additional outer body in that system.