Virial mass in DGP brane cosmology

Abstract

We study the virial mass discrepancy in the context of a DPG brane-world scenario and show that such a framework can offer viable explanations to account for the mass discrepancy problem. This is done by defining a geometrical mass $\mathcal{N}$ that we prove to be proportional to the virial mass. Estimating $\mathcal{N}$ using observational data, we show that it behaves linearly with $r$ and has a value of the order of $M_{200}$, pointing to a possible resolution of the virial mass discrepancy. We also obtain the radial velocity dispersion of galaxy clusters and show that it is compatible with the radial velocity dispersion profile of such clusters. This velocity dispersion profile can be used to differentiate various models predicting the virial mass.

12 pages, 1 figure, to appear in CQG

References in corpus (5)

• More on ghosts in DGP model
• Cascading DGP
• Generalized virial theorem in f(R) gravity
• The virial theorem and the dynamics of clusters of galaxies in the brane world models
• Can local bulk effects explain the galactic dark matter?

Cited by in corpus (8)

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• Slowly rotating Bose Einstein Condensate galactic dark matter halos, and their rotation curves
• Testing Bose-Einstein Condensate dark matter models with the SPARC galactic rotation curves data
• Jeans instability and turbulent gravitational collapse of Bose-Einstein Condensate dark matter halos
• Large Distance Modification of Newtonian Potential and Structure Formation in Universe
• Brane worlds and dark matter
• Bose-Einstein Condensate dark matter models in the presence of baryonic matter and random confining potentials
• Generalized virial theorem in warped DGP brane-world