Probing primordial features with the primary CMB

CMB photons travel from the last scattering surface, when the primary CMB has been generated, along the surface of the light cone to us. During their travel, they are affected by many secondary effects such as the integrated Sachs-Wolfe effect and CMB lensing. These CMB secondary effects modify the CMB primary power spectrum adding degeneracies and decreasing the sensibility to primordial parameters. The possibility to reconstruct the primary CMB anisotropies will allow us to have a more direct observable to test the physics of the early universe. We propose to study the imprint of features in the primordial power spectrum with the primary CMB after the subtraction of the reconstructed ISW signal from the observed CMB temperature angular power spectrum. We consider the application to features models able to fit two of the large scales anomalies observed in the CMB temperature angular power spectrum: the deficit of power at $\ell \sim 2$ and at $\ell \sim 22$. This method allows to improve significantly the constraints on the features parameters up to $16\%$ for models predicting a suppression of power of the quadrupole and up to $27\%$ for models with features at $\ell \sim 22$, assuming instrumental sensitivity similar to the $Planck$ satellite (depending on the goodness of the ISW reconstruction). Furthermore, it gives the opportunity to understand if these anomalies are attributed to early- or late-time physics.Comment: 6 pages, 2 figures, 1 table; Version accepted by Physics of Dark Univers

CMB and BAO constraints for an induced gravity dark energy model with a quartic potential

We study the predictions for structure formation in an induced gravity dark energy model with a quartic potential. By developing a dedicated Einstein-Boltzmann code, we study self-consistently the dynamics of homogeneous cosmology and of linear perturbations without using any parametrization. By evolving linear perturbations with initial conditions in the radiation era, we accurately recover the quasi-static analytic approximation in the matter dominated era. We use Planck 2013 data and a compilation of baryonic acoustic oscillation (BAO) data to constrain the coupling $\gamma$ to the Ricci curvature and the other cosmological parameters. By connecting the gravitational constant in the Einstein equation to the one measured in a Cavendish-like experiment, we find $\gamma < 0.0012$ at 95% CL with Planck 2013 and BAO data. This is the tightest cosmological constraint on $\gamma$ and on the corresponding derived post-Newtonian parameters. Because of a degeneracy between $\gamma$ and the Hubble constant $H_0$, we show how larger values for $\gamma$ are allowed, but not preferred at a significant statistical level, when local measurements of $H_0$ are combined in the analysis with Planck 2013 data.Comment: 13 pages, 7 figure

Cosmological constraints on induced gravity dark energy models

We study induced gravity dark energy models coupled with a simple monomial potential $\propto \sigma^n$ and a positive exponent $n$. These simple potentials lead to viable dark energy models with a weak dependence on the exponent, which characterizes the accelerated expansion of the cosmological model in the asymptotic attractor, when ordinary matter becomes negligible. We use recent cosmological data to constrain the coupling $\gamma$ to the Ricci curvature, under the assumptions that the scalar field starts at rest deep in the radiation era and that the gravitational constant in the Einstein equations is compatible with the one measured in a Cavendish-like experiment. By using $Planck$ 2015 data only, we obtain the 95 % CL bound $\gamma < 0.0017$ for $n=4$, which is further tightened to $\gamma < 0.00075$ by adding Baryonic Acoustic Oscillations (BAO) data. This latter bound improves by $\sim 30$ % the limit obtained with the $Planck$ 2013 data and the same compilation of BAO data. We discuss the dependence of the $\gamma$ and $\dot G_N/G_N (z=0)$ on $n$.Comment: 16 pages, 10 figure

L’interprete traduttore nel procedimento penale italiano: quale formazione alla luce delle recenti direttive europee?

Il divario esistente tra substrato normativo e applicazione della legge in materia di assistenza linguistica in ambito penale può essere colmato attraverso interventi correttivi a livello normativo e adeguate misure in materia di formazione e di abilitazione di interpreti e traduttori. Solo professionisti formati e ufficialmente abilitati, accanto a una maggior consapevolezza degli operatori del diritto di ciò che significa interpretare e tradurre, possono garantire un’assistenza linguistica qualitativamente appropriata

Ghost Dance in 31 Movements

A kind of poetry that tries to understand contemporary social and philosophical issues as much as behaviors by rewriting in a poetic language the video artwork of some of the main representatives of modernism and postmodernism. Such poetry is deprived of confessional hues, any personal reference has to be ascribed to a mirroring effect by which the single person empathically absorbs and projects what is conveyed, be it stemming directly from the historical time of the artwork\u27s making and inherited, or alive at the time of its actual viewing. By following a restructuring process started at the beginning of the twentieth century, the writing analyzes possible ways to outline developments or to underline breaking points. Poetry is seen as an active medium within the formation of societies characterized as it is by its highly introspective power, not restricted to the individual but open to all beings perceived as members of one entity

Scultura in pezzi: appunti sulla scultura alto medievale di Santa Prassede

Dedicato ai frammenti scultorei della basilica di Santa Prassede (817-824), il contributo propone alcune riflessioni su un episodio emblematico dell’età classica e creativa della scultura alto medievale a Roma.This paper looks into the fragments of liturgical furniture of Santa Prassede (817-824): an emblematic example of classical and creative sculpture in the early medieval Rome.Dedicato ai frammenti scultorei della basilica di Santa Prassede (817-824), il contributo propone alcune riflessioni su un episodio emblematico dell’età classica e creativa della scultura alto medievale a Roma