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Stability of a self-gravitating homogeneous resistive plasma
Daniela Pugliese, Nakia Carlevaro, Massimiliano Lattanzi +2
In this paper, we analyze the stability of a homogeneous self-gravitating plasma, having a non-zero resistivity. This study provides a generalization of the Jeans paradigm for dete…
Future constraints on neutrino isocurvature perturbations in the curvaton scenario
Eleonora Di Valentino, Massimiliano Lattanzi, Gianpiero Mangano +2
In the curvaton scenario, residual isocurvature perturbations can be imprinted in the cosmic neutrino component after the decay of the curvaton field, implying in turn a non-zero c…
Features in the primordial spectrum: new constraints from WMAP7+ACT data and prospects for Planck
Micol Benetti, Massimiliano Lattanzi, Erminia Calabrese +1
We update the constraints on possible features in the primordial inflationary density perturbation spectrum by using the latest data from the WMAP7 and ACT Cosmic Microwave Backgro…
Gravitational instability of the primordial plasma: anisotropic evolution of structure seeds
Massimiliano Lattanzi, Nakia Carlevaro, Giovanni Montani
We study how the presence of a background magnetic field, of intensity compatible with current observation constraints, affects the linear evolution of cosmological density perturb…
Cosmological implications of a viable non-analytical f(R) model
Salvatore Capozziello, Nakia Carlevaro, Mariafelicia De Laurentis +2
Power-law corrections (having the exponent strictly between 2 and 3) to the Einstein-Hilbert action yield an extended theory of gravity which is consistent with Solar-System tests…