| Issue |
A&A
Volume 505, Number 2, October II 2009
|
|
|---|---|---|
| Page(s) | 625 - 627 | |
| Section | Galactic structure, stellar clusters, and populations | |
| DOI | https://doi.org/10.1051/0004-6361/200912218 | |
| Published online | 03 September 2009 | |
Research Note
Collective relaxation of stellar systems revisited
1
Yerevan Physics Institute and Yerevan State University, Yerevan, Armenia e-mail: gurzadya@icra.it
2
School of Mathematical Sciences, Monash University, Clayton, Australia
Received:
27
March
2009
Accepted:
30
July
2009
The chaos in stellar systems is studied using the theory of dynamical systems and the Van Kampen stochastic differential equation approach. The exponential instability (chaos) of spherical N-body gravitating systems, already known previously, is confirmed. The characteristic timescale of that instability is estimated confirming the collective relaxation time obtained by means of the Maupertuis principle.
Key words: Galaxy: kinematics and dynamics
© ESO, 2009
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