Tuesday, June 18, 2013

1306.3651 (Alexey Golovnev et al.)

Modified gravitational collapse, or the wonders of the MOND    [PDF]

Alexey Golovnev, Natalia Masalaeva
There are many hot discussions in the literature about two competing paradigms in galactic and extra-galactic astronomy and cosmology, namely the Dark Matter and the Modified Newtonian Dynamics (MOND). It is very difficult to challenge MOND from the cosmological side because a full relativistic realisation is needed in the first place, and any failure can then be attributed to a particular model, and not to the MOND itself. We propose to study non-relativistic stages of gravitational collapse in MOND which, we argue, is a relevant task for this competition. Spherically symmetric dust cloud collapse and intrinsic unavoidable non-linearities of the deep MOND regime are discussed. We conclude that complicated, both numerical and {\it analytic}, studies of modified gravitational dynamics are needed in order to assess the viability of MOND.
View original: http://arxiv.org/abs/1306.3651

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