Made-To-Measure Models of Self-Similar Triaxial Halos with Steep Inner Density Gradients

Abstract

We use the Made-to-Measure method to construct N-body realizations of self-similar, triaxial ellipsoidal halos having cosmologically realistic density profiles. Our implementation parallels previous work with a few numerical refinements, but we show that orbital averaging is an intrinsic feature of the force of change equation and argue that additional averaging or smoothing schemes are redundant. We present models having the Einasto radial mass profile that range from prolate to strongly triaxial. We use a least-squares polynomial fit to the expansion coefficients to obtain an analytical representation of the particle density from which we derive density contours and eccentricity profiles more efficiently than by the usual particle smoothing techniques. We show that our N-body realizations both retain their shape in unconstrained evolution and recover it after large amplitude perturbations.

Revised version submitted to MNRAS. 14 pages, 7 figures - removed extra figure file

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Cited by in corpus (5)

• A new implementation of the Schwarzschild method for constructing observationally-driven dynamical models of galaxies of all morphological types
• Made-to-measure galaxy modelling utilising absorption line strength data
• Made-to-Measure Modelling of Globular Clusters
• Stellar Dynamical Modeling - Accuracy of 3D Density Estimation for Edge-on Axisymmetric Galaxies
• The validation of made-to-measure method for reconstruction of phase space distribution functions