References & Citations
Astrophysics
Title: Dark Matter Gravitational Clustering With a Long-Range Scalar Interaction
(Submitted on 11 Sep 2008 (v1), last revised 13 Sep 2008 (this version, v2))
Abstract: We explore the possibility to improve the $\Lambda$CDM model at megaparsec scales by introducing a scalar interaction which increases the mutual gravitational attraction of dark matter particles. Using N-body simulations, we study the spatial distribution of dark matter particles and halos. We measure the effect of modifications in the Newton's gravity on properties of the two-point correlation function, the dark matter power spectrum and the cumulative halo mass function. The results look promising: the scalar interaction improves the agreement between theoretical predictions and observations at megaparsec scales without spoiling the $\Lambda$CDM successes at larger scales.
Submission history
From: Wojciech Hellwing [view email][v1] Thu, 11 Sep 2008 12:51:57 GMT (628kb)
[v2] Sat, 13 Sep 2008 14:49:16 GMT (627kb)