%AGiovinazzi, Mark [Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania USA]%ABlake, Cullen [Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania USA]%AEastman, Jason [Center for Astrophysics Harvard &, Smithsonian Cambridge Massachusetts USA]%AWright, Jason [Department of Astronomy, Center for Exoplanets and Habitable Worlds, Penn State Extraterrestrial Intelligence Center The Pennsylvania State University State College Pennsylvania USA]%AMcCrady, Nate [Department of Physics and Astronomy The University of Montana Missoula Montana USA]%AWittenmyer, Rob [Centre for Astrophysics University of Southern Queensland Toowoomba Queensland Australia]%AJohnson, John [Center for Astrophysics Harvard &, Smithsonian Cambridge Massachusetts USA]%APlavchan, Peter [Department of Physics and Astronomy George Mason University Fairfax Virginia USA]%ASliski, David [Department of Physics and Astronomy University of Pennsylvania Philadelphia Pennsylvania USA]%AWilson, Maurice [Center for Astrophysics Harvard &, Smithsonian Cambridge Massachusetts USA]%AJohnson, Samson [Department of Astronomy The Ohio State University Columbus Ohio USA]%AHorner, Jonathan [Centre for Astrophysics University of Southern Queensland Toowoomba Queensland Australia]%AKane, Stephen [Department of Earth and Planetary Sciences University of California at Riverside Riverside California USA]%AHoughton, Audrey [Department of Physics and Astronomy The University of Montana Missoula Montana USA]%AGarcía‐Mejía, Juliana [Center for Astrophysics Harvard &, Smithsonian Cambridge Massachusetts USA]%AGlaser, Joseph [Department of Physics Drexel University Philadelphia Pennsylvania USA]%BJournal Name: Astronomische Nachrichten; Journal Volume: 341; Journal Issue: 9; Related Information: CHORUS Timestamp: 2023-09-03 10:30:01 %D2020%IWiley Blackwell (John Wiley & Sons) %JJournal Name: Astronomische Nachrichten; Journal Volume: 341; Journal Issue: 9; Related Information: CHORUS Timestamp: 2023-09-03 10:30:01 %K %MOSTI ID: 10236679 %PMedium: X %TThe HD 217107 planetary system: Twenty years of radial velocity measurements %XAbstract

The hot Jupiter HD 217107 b was one of the first exoplanets detected using the radial velocity (RV) method, originally reported in the literature in 1999. Today, precise RV measurements of this system span more than 20 years, and there is clear evidence of a longer‐period companion, HD 217107 c. Interestingly, both the short‐period planet (Pb ∼ 7.13 d) and long‐period planet (Pc ∼ 5059d) have significantly eccentric orbits (eb ∼ 0.13andec ∼ 0.40). We present 42 additional RV measurements of this system obtained with the MINERVA telescope array and carry out a joint analysis with previously published RV measurements from four different facilities. We confirm and refine the previously reported orbit of the long‐period companion. HD 217107 b is one of a relatively small number of hot Jupiters with an eccentric orbit, opening up the possibility of detecting the precession of the planetary orbit due to general relativistic effects and perturbations from other planets in the system. In this case, the argument of periastron,ω, is predicted to change at the level of0.8century−1. Despite the long time baseline of our observations and the high quality of the RV measurements, we are only able to constrain the precession to becentury−1. We discuss the limitations of detecting the subtle effects of precession in exoplanet orbits using RV data.

%0Journal Article