Constraints on Stellar-Dynamical Models of the Orion Nebula Cluster

Abstract

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.

17 pages, 7 figures, New Astronomy, in press

References in corpus (1)

• Binary stars in young clusters: models versus observations of the Trapezium Cluster

Cited by in corpus (32)

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• The Formation of a Bound Star Cluster: From the Orion Nebula Cluster to the Pleiades
• On the origin of the O and B-type stars with high velocities II Runaway stars and pulsars ejected from the nearby young stellar groups
• The stellar and sub-stellar IMF of simple and composite populations
• On the mass function of star clusters
• Inverse dynamical population synthesis: Constraining the initial conditions of young stellar clusters by studying their binary populations
• Destruction of protoplanetary disks in the Orion Nebula Cluster
• Kinematics of the Orion Nebula Cluster: Velocity Substructure and Spectroscopic Binaries
• Thickening of galactic disks through clustered star formation
• Kinematic Structure of the Orion Nebula Cluster and its Surroundings
• The influence of residual gas expulsion on the evolution of the Galactic globular cluster system and the origin of the Population II halo
• Limits on the primordial stellar multiplicity
• Visual Binaries in the Orion Nebula Cluster
• Dense Stellar Populations: Initial Conditions
• Reassessing the formation of the inner Oort cloud in an embedded star cluster
• Do binaries in clusters form in the same way as in the field?
• Dependency of dynamical ejections of O stars on the masses of very young star clusters
• An analytical description of the evolution of binary orbital-parameter distributions in N-body computations of star clusters
• On the universal outcome of star-formation: Is there a link between stars and brown-dwarfs?
• Evidence for feedback and stellar-dynamically regulated bursty star cluster formation: the case of the Orion Nebula Cluster
• A highly efficient measure of mass segregation in star clusters
• Slingshot Mechanism for Clusters: Gas Density Regulates Star Density in the Orion Nebula Cluster (M42)
• Signatures of star cluster formation by cold collapse
• Towards the field binary population: Influence of orbital decay on close binaries
• The 3-D Kinematics of the Orion Nebula Cluster: NIRSPEC-AO Radial Velocities of the Core Population
• Massive Stars: Their Birth Sites and Distribution
• Gas velocity structure of the Orion A Integral Shaped Filament
• Open cluster stability and the effects of binary stars
• Brown dwarf populations in open clusters
• Core dissolution and the dynamics of massive stars in young stellar clusters
• Origin and possible birthplace of the extreme runaway star HIP 60350
• The 3D Kinematics of the Orion Nebula Cluster II: Mass-dependent Kinematics of the Inner Cluster