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Title: A detailed analysis of the HD 73526 2:1 resonant planetary system

We present six years of new radial velocity data from the Anglo-Australian and Magellan Telescopes on the HD 73526 2:1 resonant planetary system. We investigate both Keplerian and dynamical (interacting) fits to these data, yielding four possible configurations for the system. The new data now show that both resonance angles are librating, with amplitudes of 40° and 60°, respectively. We then perform long-term dynamical stability tests to differentiate these solutions, which only differ significantly in the masses of the planets. We show that while there is no clearly preferred system inclination, the dynamical fit with i = 90° provides the best combination of goodness-of-fit and long-term dynamical stability.
Authors:
; ; ; ; ;  [1] ; ;  [2] ; ;  [3] ;  [4] ;  [5] ;  [6] ; ; ;  [7] ; ;  [8]
  1. School of Physics, University of New South Wales, Sydney 2052 (Australia)
  2. Department of Earth Sciences, The University of Hong Kong, Pokfulam Road (Hong Kong)
  3. Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015-1305 (United States)
  4. Faculty of Sciences, University of Southern Queensland, Toowoomba, Queensland 4350 (Australia)
  5. University of Hertfordshire, Centre for Astrophysics Research, Science and Technology Research Institute, College Lane, AL10 9AB, Hatfield (United Kingdom)
  6. Australian Astronomical Observatory, PO Box 915, North Ryde, NSW 1670 (Australia)
  7. The Observatories of the Carnegie Institution of Washington, 813 Santa Barbara Street, Pasadena, CA 91101 (United States)
  8. Institute of Astrophysics, Pontificia Universidad Catolica de Chile, Casilla 306, Santiago 22 (Chile)
Publication Date:
OSTI Identifier:
22348256
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astrophysical Journal; Journal Volume: 780; Journal Issue: 2; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; AMPLITUDES; COMPUTERIZED SIMULATION; CONFIGURATION; EVOLUTION; INCLINATION; MASS; MATHEMATICAL SOLUTIONS; PLANETS; RADIAL VELOCITY; RESONANCE; SATELLITES; STABILITY; TELESCOPES