2k citations · 14.6k across the 169 of their papers we have counts for
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Probing Dark Energy at Galactic and Cluster Scales
David F. Mota
We investigate dark matter halo properties as a function of a time--varying dark energy equation of state. The dynamics of the collapse of the halo is governed by the form of the q…
Vector Field Models of Inflation and Dark Energy
Tomi S. Koivisto, David F. Mota
We consider several new classes of viable vector field alternatives to the inflaton and quintessence scalar fields. Spatial vector fields are shown to be compatible with the cosmol…
Anisotropic Dark Energy: Dynamics of Background and Perturbations
Tomi Koivisto, David F. Mota
We investigate cosmologies where the accelerated expansion of the Universe is driven by a field with an anisotropic equation of state. We model such scenarios within the Bianchi I…
CMB Anisotropies and Inflation from Non-Standard Spinors
Christian G. Boehmer, David F. Mota
The apparent alignment of the cosmic microwave background multipoles on large scales challenges the standard cosmological model. Scalar field inflation is isotropic and cannot acco…
Constraining Dark Energy Anisotropic Stress
D. F. Mota, J. R. Kristiansen, T. Koivisto +1
We investigate the possibility of using cosmological observations to probe and constrain an imperfect dark energy fluid. We consider a general parameterization of the dark energy c…
Detecting a Lorentz-Violating Field in Cosmology
Baojiu Li, David F. Mota, John D. Barrow
We consider cosmology in the Einstein-aether theory (the generally covariant theory of gravitation coupled to a dynamical timelike Lorentz-violating vector field) with a linear aet…