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Journal article
TheHD217107 planetary system: Twenty years of radial velocity measurements
Astronomische Nachrichten, v 341(9), pp 870-878
01 Nov 2020
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Abstract
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 (P-b similar to 7.13 d) and long-period planet (P-c similar to 5059d) have significantly eccentric orbits (e(b) similar to 0.13ande(c) similar to 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,omega, is predicted to change at the level of similar to 0.8 degrees century(-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 be omega<65.9 degrees century(-1). We discuss the limitations of detecting the subtle effects of precession in exoplanet orbits using RV data.
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Details
- Title
- TheHD217107 planetary system: Twenty years of radial velocity measurements
- Creators
- Mark R. Giovinazzi (Corresponding Author) - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19103 USACullen H. Blake - Univ Penn, Dept Phys & Astron, Philadelphia, PA 19103 USAJason D. Eastman - Center for Astrophysics Harvard & SmithsonianJason Wright - Pennsylvania State UniversityNate McCrady - University of MontanaRob Wittenmyer - University of Southern QueenslandJohn A. Johnson - Center for Astrophysics Harvard & SmithsonianPeter Plavchan - George Mason UniversityDavid H. Sliski - University of PennsylvaniaMaurice L. Wilson - Center for Astrophysics Harvard & SmithsonianSamson A. Johnson - The Ohio State UniversityJonathan Horner - University of Southern QueenslandStephen R. Kane - University of California, RiversideAudrey Houghton - University of MontanaJuliana Garcia-Mejia - Center for Astrophysics Harvard & SmithsonianJoseph P. Glaser - Drexel Univ, Dept Phys, Philadelphia, PA 19104 USA
- Publication Details
- Astronomische Nachrichten, v 341(9), pp 870-878
- Publisher
- Wiley
- Number of pages
- 9
- Grant note
- George Mason University Pennsylvania State University AAG 1716202; 1608203; 1516242 / National Science Foundation; National Science Foundation (NSF) Mt. Cuba Astronomical Foundation NASA Exoplanet Exploration Program Nancy Grace Roman Fellowship 1608203 / Direct For Mathematical & Physical Scien; Division Of Astronomical Sciences; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) 1516242 / Division Of Astronomical Sciences; Direct For Mathematical & Physical Scien; National Science Foundation (NSF); NSF - Directorate for Mathematical & Physical Sciences (MPS) Eberly College of Science NNX13AM97A / National Aeronautics and Space Administration (NASA) EPSCOR
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000576603300001
- Scopus ID
- 2-s2.0-85092332817
- Other Identifier
- 991021860684504721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Astronomy & Astrophysics