Abstract
We describe an algorithm for constructing N-body realisations of equilibrium stellar systems. The algorithm complements existing orbit-based modelling techniques using linear programming or other optimization algorithms. The equilibria are constructed by integrating an N-body system while slowly adjusting the masses of the particles until the time-averaged density field and other observables converge to a prescribed value. The procedure can be arranged to maximise a linear combination of the entropy of the system and the \\chi^2 statistic for the observables. The equilibria so produced may be useful as initial conditions for N-body simulations or for modelling observations of individual galaxies.
Keywords
PhysicsObservableStatistical physicsMeasure (data warehouse)StatisticGalaxyOrbit (dynamics)Applied mathematicsEntropy (arrow of time)AstrophysicsAlgorithmStatisticsComputer scienceThermodynamicsAerospace engineeringData miningQuantum mechanics
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Publication Info
- Year
- 1996
- Type
- article
- Volume
- 282
- Issue
- 1
- Pages
- 223-233
- Citations
- 178
- Access
- Closed
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Cite This
D. Syer,
Scott Tremaine
(1996).
Made-to-measure N-body systems.
Monthly Notices of the Royal Astronomical Society
, 282
(1)
, 223-233.
https://doi.org/10.1093/mnras/282.1.223
Identifiers
- DOI
- 10.1093/mnras/282.1.223