The 2:1 resonant exoplanetary system orbiting HD 73526

Tinney, Chris G. and Butler, R. Paul and Marcy, Geoffrey W. and Jones, Hugh R. A. and Laughlin, Gregory and Carter, Brad D. and Bailey, Jeremy and O'Toole, Simon J. (2006) The 2:1 resonant exoplanetary system orbiting HD 73526. The Astrophysical Journal, 647 (1). pp. 594-599. ISSN 0004-637X

Abstract

[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 188 d. 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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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author's version not held.
Depositing User: epEditor USQ
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 00:56
Last Modified: 02 Jul 2013 22:41
Uncontrolled Keywords: planetary systems, stars, HD73526
Fields of Research (FOR2008): 02 Physical Sciences > 0201 Astronomical and Space Sciences > 020110 Stellar Astronomy and Planetary Systems
02 Physical Sciences > 0201 Astronomical and Space Sciences > 020108 Planetary Science (excl. Extraterrestrial Geology)
URI: http://eprints.usq.edu.au/id/eprint/2052

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