962 citations · 3.1k across the 43 of their papers we have counts for
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On the dark energy rest frame and the CMB
Jose Beltran Jimenez, Antonio L. Maroto
Dark energy is usually parametrized as a perfect fluid with negative pressure and a certain equation of state. Besides, it is supposed to interact very weakly with the rest of the…
Avoiding the dark energy coincidence problem with a cosmic vector
Jose Beltran Jimenez, Antonio L. Maroto
We show that vector theories on cosmological scales are excellent candidates for dark energy. We consider two different examples, both are theories with no dimensional parameters n…
Large-scale cosmic flows and moving dark energy
Jose Beltran Jimenez, Antonio L. Maroto
Large-scale matter bulk flows with respect to the cosmic microwave background have very recently been detected on scales 100 Mpc/h and 300 Mpc/h by using two different techniques s…
Viability of vector-tensor theories of gravity
Jose Beltran Jimenez, Antonio L. Maroto
We present a detailed study of the viability of general vector-tensor theories of gravity in the presence of an arbitrary temporal background vector field. We find that there are s…
Cosmological electromagnetic fields and dark energy
Jose Beltran Jimenez, Antonio L. Maroto
We show that the presence of a temporal electromagnetic field on cosmological scales generates an effective cosmological constant which can account for the accelerated expansion of…
Vector models for dark energy
Jose Beltran Jimenez, Antonio L. Maroto
We explore the possibility that the present stage of accelerated expansion of the universe is due to the presence of a cosmic vector field. We show that vector theories allow for t…