Phantom dark energy with varying-mass dark matter particles: acceleration and cosmic coincidence problem

Details Phantom dark energy with varying-mass dark matter particles: acceleration and cosmic coincidence problem Phantom dark energy with varying-mass dark matter particles: acceleration and cosmic coincidence problem

2009-04-09

arxiv.org/abs/0904.1577v1

Phys.Lett.B693:1,2010; Phys.Lett.B693:1-10,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 5 figures

Scientific paper

10.1016/j.physletb.2010.08.016

We investigate several varying-mass dark-matter particle models in the framework of phantom cosmology. We examine whether there exist late-time cosmological solutions, corresponding to an accelerating universe and possessing dark energy and dark matter densities of the same order. Imposing exponential or power-law potentials and exponential or power-law mass dependence, we conclude that the coincidence problem cannot be solved or even alleviated. Thus, if dark energy is attributed to the phantom paradigm, varying-mass dark matter models cannot fulfill the basic requirement that led to their construction.

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