Predicting Planets in Known Extrasolar Planetary Systems. II. Testing for Saturn Mass Planets | Zendy

Sean N. Raymond | Zendy; Rory Barnes | Zendy

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Predicting Planets in Known Extrasolar Planetary Systems. II. Testing for Saturn Mass Planets

Author(s) -

Sean N. Raymond,

Rory Barnes

Publication year - 2005

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/426311

Subject(s) - planet , physics , exoplanet , saturn , astronomy , astrophysics , planetary mass , eccentricity (behavior) , minimum mass , planetary system , astrobiology , political science , law

Recent results have shown that many of the known extrasolar planetary systemscontain regions which are stable for massless test particles. We examine thepossibility that Saturn-mass planets exist in these systems, just below thedetection threshold, and attempt to predict likely orbital parameters for suchunseen planets. To do this, we insert a Saturn-mass planet into the stableregions of these systems and integrate its orbit for 100 million years. Weconduct 200-600 of these experiments to test parameter space in HD37124,HD38529, 55Cnc, and HD74156. In HD37124 the global maximum of the survival rateof Saturns in parameter space is at semimajor axis a = 1.03 AU, eccentricitye=0.1. In HD38529, only 5% of Saturns are unstable, and the region in which aSaturn could survive is very broad, centered on 0.5

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