962 citations · 3.1k across the 43 of their papers we have counts for
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Black hole formation from a general quadratic action for inflationary primordial fluctuations
Guillermo Ballesteros, Jose Beltran Jimenez, Mauro Pieroni
The most up to date femto- and micro-lensing constraints indicate that primordial black holes of and , respectively, may constitute a…
Anisotropic expansion and SNIa: an open issue
Jose Beltran Jimenez, Vincenzo Salzano, Ruth Lazkoz
We review the appropriateness of using SNIa observations to detect potential signatures of anisotropic expansion in the Universe. We focus on Union2 and SNLS3 SNIa datasets and use…
Backreaction mechanism in multifluid and extended cosmologies
Jose Beltran Jimenez, Alvaro de la Cruz-Dombriz, Peter K. S. Dunsby +1
One possible explanation for the present observed acceleration of the Universe is the breakdown of homogeneity and isotropy due to the formation of non-linear structures. How inhom…
Exact Mapping between Tensor and Most General Scalar Power Spectra
Jose Beltran Jimenez, Marcello Musso, Christophe Ringeval
We prove an exact relation between the tensor and the scalar primordial power spectra generated during inflation. Such a mapping considerably simplifies the derivation of any power…
N-body simulations with a cosmic vector for dark energy
Edoardo Carlesi, Alexander Knebe, Gustavo Yepes +3
We present the results of a series of cosmological -body simulations of a Vector Dark Energy (VDE) model, performed using a suitably modified version of the publicly available \…
The Dark Magnetism of the Universe
Jose Beltran Jimenez, Antonio L. Maroto
Despite the success of Maxwell's electromagnetism in the description of the electromagnetic interactions on small scales, we know very little about the behaviour of electromagnetic…