2008

Cosmological Structure Formation under MOND: a new numerical solver for Poisson's equation

Llinares, Claudio, Knebe, Alexander, Zhao, HongSheng

Understand

We present a novel solver for an analogue to Poisson's equation in the framework of modified Newtonian dynamics (MOND).

This equation is highly non-linear and hence standard codes based upon tree structures and/or FFT's in general are not applicable; one needs to defer to multi-grid relaxation techniques.
After a detailed description of the necessary modifications to the cosmological N-body code AMIGA (formerly known as MLAPM) we utilize the new code to revisit the issue of cosmic structure formation under MOND.
We find that the proper (numerical) integration of a MONDian Poisson's equation has some noticable effects on the final results when compared against simulations of the same kind but based upon rather ad-hoc assumptions about the properties of the MONDian force field.

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