SIMBAD references

2017MNRAS.466.4937A - Mon. Not. R. Astron. Soc., 466, 4937-4953 (2017/April-3)

On the dynamical evolution of the Orion Trapezium.


Abstract (from CDS):

We discuss recent observational data on the transverse and radial velocities, as well as on the masses of the main components of the Orion Trapezium. Based on the most reliable values of these quantities, we study the dynamical evolution of ensembles of multiple systems mimicking the Orion Trapezium. To this end, we conduct numerical N-body integrations using the observed masses, planar positions and velocities, radial velocities and random line-of-sight (z) positions for all components. We include perturbations in these quantities compatible with the observational errors. We find the dynamical lifetimes of such systems to be quite short, of the order of 10-50 thousand years. The end result of the simulations is usually a tight binary, or sometimes a hierarchical triple. The properties of the evolved systems are studied at different values of the crossing times. The frequency distributions of the major semi-axes and eccentricities of the resulting binaries are discussed and compared with observations.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): binaries: general - stars: early-type - stars: formation - stars: individual: Orion Trapezium - stars: kinematics and dynamics - stars: kinematics and dynamics

Simbad objects: 10

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