Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-05
Astrophys.J.654:625-632,2006
Astronomy and Astrophysics
Astrophysics
Accepted for publication in ApJ
Scientific paper
10.1086/509110
The possible existence of additional long-period planetary-mass objects in the extrasolar planetary systems 47 UMa and 14 Her is investigated. We combine all available radial-velocity data on these stars, spanning up to 18 years. For the 47 UMa system, we show that while a second planet improves the fit to all available data, there is still substantial ambiguity as to the orbital parameters of the proposed planetary companion 47 UMa c. We also present new observations which clearly support a long-period companion in the 14 Her system. With a period of 6906+/-70 days, 14 Her c may be in a 4:1 resonance with the inner planet. We also present revised orbital solutions for 7 previously known planets incorporating recent additional data obtained with the 2.7m Harlan J. Smith Telescope at McDonald Observatory.
Cochran William D.
Endl Michael
Wittenmyer Robert A.
No associations
LandOfFree
Long-Period Objects in the Extrasolar Planetary Systems 47 UMa and 14 Her does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Long-Period Objects in the Extrasolar Planetary Systems 47 UMa and 14 Her, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Long-Period Objects in the Extrasolar Planetary Systems 47 UMa and 14 Her will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-554314