Constraints on Stellar-Dynamical Models of the Orion Nebula Cluster

Details Constraints on Stellar-Dynamical Models of the Orion Nebula Cluster Constraints on Stellar-Dynamical Models of the Orion Nebula Cluster

1999-07-27

arxiv.org/abs/astro-ph/9907380v1

New Astron. 4 (2000) 615-624

Astronomy and Astrophysics

Astrophysics

17 pages, 7 figures, New Astronomy, in press

Scientific paper

10.1016/S1384-1076(99)00048-2

The results obtained by Kroupa, Petr & McCaughrean (1999) for specific models of young compact binary-rich clusters are generalised using dynamical scaling relations, to infer the candidate set of possible birth models leading to the Orion Nebula Cluster (ONC), of which the Trapezium Cluster is the core. It is found that candidate sets of solutions exist which allow the ONC to be in virial equilibrium, expanding or contracting. The range of possible solutions is quite narrow. These results will serve as guidelines for future, CPU-intensive calculations of the stellar-dynamical and astrophysical evolution of the entire ONC. These, in turn, will be essential to quantify observables that will ultimately discriminate between models, thus allowing us to understand if the ONC is in the process of assembling a rich Galactic cluster, and, if this is the case, how it occurs.

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