The 2:1 resonant exoplanetary system orbiting HD73526
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.
Cite
@article{arxiv.astro-ph/0602557,
title = {The 2:1 resonant exoplanetary system orbiting HD73526},
author = {C. G. Tinney and R. Paul Butler and Geoffrey W. Marcy and Hugh R. A. Jones and Gregory Laughlin and Brad D. Carter and Jeremy A. Bailey and Simon O'Toole},
journal= {arXiv preprint arXiv:astro-ph/0602557},
year = {2008}
}
Comments
To appear in The Astrophysical Journal