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The 2:1 resonant exoplanetary system orbiting HD73526

C. G. Tinney·R. Paul Butler·Geoffrey W. Marcy·Hugh R. A. Jones·Gregory Laughlin·Brad D. Carter·Jeremy A. Bailey·Simon O'Toole
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Abstract

We report the detection of a second exoplanet orbiting the G6V dwarf HD73526. This second planet has an orbital period of 377 d, putting it in a 2:1 resonance with the previously known exoplanet, the orbital period for which is updated to 188d. Dynamical modeling of the combined system allows solution for a self-consistent set of orbital elements for both components. HD73526 is the fourth exoplanetary system (of a total of 18 systems with 2 or more components currently known) to have components detected in 2:1 resonance. Finding such a large fraction of multiple planets (more than 20 per cent) in 2:1 resonance strongly suggests that orbital migration, halted by stabilisation in a trapping resonance, plays an important role in the evolution of exoplanets in multiple planet systems.

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C. G. Tinney, R. Paul Butler, Geoffrey W. Marcy, Hugh R. A. Jones, Gregory Laughlin, Brad D. Carter, Jeremy A. Bailey, Simon O'Toole. 2006-02-25. The 2:1 resonant exoplanetary system orbiting HD73526. https://doi.org/10.1086/503706

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