14.2k citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of PaduaIT5.1k papers
- Centre National de la Recherche ScientifiqueFR3.5k papers
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- Istituto Nazionale di Fisica Nucleare, Sezione di Roma IIT3.1k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di PisaIT2.8k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BolognaIT2.8k papers
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- Istituto Nazionale di Fisica Nucleare, Sezione di BariIT2.5k papers
- European Organization for Nuclear ResearchCH2.5k papers
- Massachusetts Institute of TechnologyUS2.5k papers
32 papers · 2 filters
Modeling the clustering of dark-matter haloes in resummed perturbation theories
Anna Elia, Suchita Kulkarni, Cristiano Porciani +2
We address the issue of the cosmological bias between matter and galaxy distributions, looking at dark-matter haloes as a first step to characterize galaxy clustering. Starting fro…
Unified Dark Matter scalar field models with fast transition
Daniele Bertacca, Marco Bruni, Oliver F. Piattella +1
We investigate the general properties of Unified Dark Matter (UDM) scalar field models with Lagrangians with a non-canonical kinetic term, looking specifically for models that can…
Next-to-leading resummations in cosmological perturbation theory
Stefano Anselmi, Sabino Matarrese, Massimo Pietroni
One of the nicest results in cosmological perturbation theory is the analytical resummaton of the leading corrections at large momentum, which was obtained by Crocce and Scoccimarr…
Relativistic effects and primordial non-Gaussianity in the galaxy bias
N. Bartolo, S. Matarrese, A. Riotto
When dealing with observables, one needs to generalize the bias relation between the observed galaxy fluctuation field to the underlying matter distribution in a gauge-invariant wa…
Tilt and Running of Cosmological Observables in Generalized Single-Field Inflation
Nicola Bartolo, Matteo Fasiello, Sabino Matarrese +1
Employing an effective field theory approach to inflationary perturbations, we analyze in detail the effect of curvature-generated Lagrangian operators on various observables, focu…
Strongly Scale-dependent Non-Gaussianity
Antonio Riotto, Martin S. Sloth
We discuss models of primordial density perturbations where the non-Gaussianity is strongly scale-dependent. In particular, the non-Gaussianity may have a sharp cut-off and be very…
Constraining Primordial Non-Gaussianity with High-Redshift Probes
Jun-Qing Xia, Anna Bonaldi, Carlo Baccigalupi +4
We present an analysis of the constraints on the amplitude of primordial non-Gaussianity of local type described by the dimensionless parameter . These constraints are…
Unified Dark Matter Scalar Field Models
Daniele Bertacca, Nicola Bartolo, Sabino Matarrese
In this work we analyze and review cosmological models in which the dynamics of a single scalar field accounts for a unified description of the Dark Matter and Dark Energy sectors,…
Fermi Large Area Telescope and multi-wavelength observations of the flaring activity of PKS 1510-089 between 2008 September and 2009 June
LAT Collaboration
We report on the multi-wavelength observations of PKS 1510-089 (a flat spectrum radio quasar at z=0.361) during its high activity period between 2008 September and 2009 June. Durin…
The Bias and Mass Function of Dark Matter Halos in Non-Markovian Extension of the Excursion Set Theory
Chung-Pei Ma, Michele Maggiore, Antonio Riotto +1
The excursion set theory based on spherical or ellipsoidal gravitational collapse provides an elegant analytic framework for calculating the mass function and the large-scale bias…
Excursion Set Theory for generic moving barriers and non-Gaussian initial conditions
Andrea De Simone, Michele Maggiore, Antonio Riotto
Excursion set theory, where density perturbations evolve stochastically with the smoothing scale, provides a method for computing the mass function of cosmological structures like…
Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Trispectrum
Nicola Bartolo, Matteo Fasiello, Sabino Matarrese +1
We perform the analysis of the trispectrum of curvature perturbations generated by the interactions characterizing a general theory of single-field inflation obtained by effective…
One-loop corrections to the power spectrum in general single-field inflation
Nicola Bartolo, Emanuela Dimastrogiovanni, Alberto Vallinotto
We perform a thorough computation of the one-loop corrections from both scalar and tensor degrees of freedom to the power spectrum of curvature fluctuations for non-canonical Lagra…
Dark Coupling and Gauge Invariance
M. B. Gavela, L. Lopez-Honorez, O. Mena +1
We study a coupled dark energy-dark matter model in which the energy-momentum exchange is proportional to the Hubble expansion rate. The inclusion of its perturbation is required b…
A numerical study of the effects of primordial non-Gaussianities on weak lensing statistics
F. Pace, L. Moscardini, M. Bartelmann +4
While usually cosmological initial conditions are assumed to be Gaussian, inflationary theories can predict a certain amount of primordial non-Gaussianity which can have an impact…
A change in the optical polarization associated with a gamma-ray flare in the blazar 3C 279
LAT Collaboration, members of the 3C 279 multi-band campaign
It is widely accepted that strong and variable radiation detected over all accessible energy bands in a number of active galaxies arises from a relativistic, Doppler-boosted jet po…
On the DM interpretation of the origin of non-thermal phenomena in galaxy clusters
S. Colafrancesco, R. Lieu, P. Marchegiani +2
(Abridged) We study the predictions of various annihilating Dark Matter (DM) models in order to interpret the origin of non-thermal phenomena in galaxy clusters. We consider three…
Dark energy with non-adiabatic sound speed: initial conditions and detectability
Guillermo Ballesteros, Julien Lesgourgues
Assuming that the universe contains a dark energy fluid with a constant linear equation of state and a constant sound speed, we study the prospects of detecting dark energy perturb…
Non-Gaussian halo assembly bias
Beth A. Reid, Licia Verde, Klaus Dolag +2
The strong dependence of the large-scale dark matter halo bias on the (local) non-Gaussianity parameter, f_NL, offers a promising avenue towards constraining primordial non-Gaussia…
Large non-Gaussianities in the Effective Field Theory Approach to Single-Field Inflation: the Bispectrum
Nicola Bartolo, Matteo Fasiello, Sabino Matarrese +1
The methods of effective field theory are used to study generic theories of inflation with a single inflaton field and to perform a general analysis of the associated non-Gaussiani…
Constraining blazar distances with combined Fermi and TeV data: an empirical approach
E. Prandini, G. Bonnoli, L. Maraschi +2
We discuss a method to constrain the distance of blazars with unknown redshift using combined observations in the GeV and TeV regimes. We assume that the VHE spectrum corrected for…
Primordial Non-Gaussianity and the NRAO VLA Sky Survey
Jun-Qing Xia, Matteo Viel, Carlo Baccigalupi +3
The NRAO VLA Sky Survey (NVSS) is the only dataset that allows an accurate determination of the auto-correlation function (ACF) on angular scales of several degrees for Active Gala…
The Fermi-LAT high-latitude Survey: Source Count Distributions and the Origin of the Extragalactic Diffuse Background
LAT Collaboration
This is the first of a series of papers aimed at characterizing the populations detected in the high-latitude sky of the {\it Fermi}-LAT survey. In this work we focus on the intrin…
The potential of X-ray cluster surveys to constrain primordial non-Gaussianity
B. Sartoris, S. Borgani, C. Fedeli +4
We present forecasts for constraints on deviations from Gaussian distribution of primordial density perturbations from future X-ray surveys of galaxy clusters. Our analysis is base…