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| Paper: |
Dynamics of Multiple Stars: Observations |
| Volume: |
367, Massive Stars in Interactive Binaries |
| Page: |
615 |
| Authors: |
Tokovinin, A. |
| Abstract: |
The dynamics of hierarchical multiple stars is observed mostly by a combination of various techniques that lead to the determination of orbits. It is found that the empirical limit of dynamical stability matches the theoretical limit for circular outer orbits but is more restrictive for eccentric orbits. The relative orientation of orbits in triple stars shows some weak correlation, likely explained by their origin as decay products of small clusters. The combination of dynamics and tides leads to the formation of close binaries within higher-order multiples. Examples of such systems (Algol, Capella, 41 Dra) show that even distant tertiary components can significantly modify stellar evolution. |
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