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Abstract
We perform a stability test of triaxial models in MOdified Newtonian Dynamics (MOND) using Nbody simulations. The triaxial models considered here have densities that vary with $r^{1}$ in the center and $r^{4}$ at large radii. The total mass of the model varies from $10^8\Msun$ to $10^{10}\Msun$, representing the mass scale of dwarfs to mediummass elliptical galaxies, respectively, from deep MOND to quasiNewtonian gravity. We build triaxial galaxy models using the Schwarzschild technique, and evolve the systems for 200 Keplerian dynamical times (at the typical length scale of 1.0 kpc). We find that the systems are virial overheating, and in quasiequilibrium with the relaxation taking approximately 5 Keplerian dynamical times (1.0 kpc). For all systems, the change of the inertial (kinetic) energy is less than 10% (20%) after relaxation. However, the central profile of the model is flattened during the relaxation and the (overall) axis ratios change by roughly 10% within 200 Keplerian dynamical times (at 1.0kpc) in our simulations. We further find that the systems are stable once they reach the equilibrium state.
Original language  English 

Pages (fromto)  109120 
Journal  Monthly Notices of the Royal Astronomical Society 
Volume  396 
Issue number  1 
DOIs  
Publication status  Published  11 Jun 2009 
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Dive into the research topics of 'Nbody simulations for testing the stability of triaxial galaxies in MOND'. Together they form a unique fingerprint.Projects
 2 Finished

Astrophysics in St Andrews: Astrophysics in St Andrews / SUPA (Continuan of Rolling Grant  XPP089
Bonnell, I. A. (PI), Cameron, A. C. (CoI), Dominik, M. (CoI), Driver, S. P. (CoI), Greaves, J. S. (CoI), Horne, K. D. (CoI), Jardine, M. M. (CoI), Wood, K. (CoI) & Zhao, H. (CoI)
Science & Technology Facilities Council
1/04/09 → 31/03/12
Project: Standard

Astrophysics at St Andrews: Astrophysics at St.Andrews
Cameron, A. C. (PI) & Horne, K. D. (CoI)
1/04/06 → 31/03/11
Project: Standard