Stable chaos in the 55Cnc exoplanetary system?

Details Stable chaos in the 55Cnc exoplanetary system? Stable chaos in the 55Cnc exoplanetary system?

2008-07-08

arxiv.org/abs/0807.1235v1

MNRAS Letters 389 (2008) L1-L3

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures, 1 table, accepted for publication in MNRAS Letters (May 23, 2008)

Scientific paper

10.1111/j.1745-3933.2008.00505.x

The five planets discovered around the main-sequence star 55 Cnc may represent a case of stable chaos. By using both the Frequency Map Analysis and MEGNO we find that about 15 % of the systems that can be build from the nominal orbital elements of the system are highly chaotic. However, in spite of the fast diffusion rate in the phase space, the planetary system is not destabilized over 400 Myr and close encounters between the planets are avoided.

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