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
- Institut National de Physique Nucléaire et de Physique des ParticulesFR3.2k papers
- 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
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT2.7k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di TriesteIT2.7k papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR2.6k papers
- Istituto Nazionale di Fisica Nucleare, Sezione di BariIT2.5k papers
- European Organization for Nuclear ResearchCH2.5k papers
- Massachusetts Institute of TechnologyUS2.5k papers
22 papers · 2 filters
Nonlinear cosmological consistency relations and effective matter stresses
Guillermo Ballesteros, Lukas Hollenstein, Rajeev Kumar Jain +1
We propose a fully nonlinear framework to construct consistency relations for testing generic cosmological scenarios using the evolution of large scale structure. It is based on th…
The 2010 very high energy gamma-ray flare & 10 years of multi-wavelength observations of M 87
The H. E. S. S. Collaboration, :, A. Abramowski +442
Abridged: The giant radio galaxy M 87 with its proximity, famous jet, and very massive black hole provides a unique opportunity to investigate the origin of very high energy (VHE;…
Non-Gaussianity in the Cosmic Microwave Background Anisotropies at Recombination in the Squeezed limit
N. Bartolo, S. Matarrese, A. Riotto
We estimate analytically the second-order cosmic microwave background temperature anisotropies at the recombination epoch in the squeezed limit and we deduce the contamination to t…
Directional limits on persistent gravitational waves using LIGO S5 science data
J. Abadie, B. P. Abbott, R. Abbott +712
The gravitational-wave (GW) sky may include nearby pointlike sources as well as astrophysical and cosmological stochastic backgrounds. Since the relative strength and angular distr…
Coarse-Grained Cosmological Perturbation Theory
Massimo Pietroni, Gianpiero Mangano, Ninetta Saviano +1
Semi-analytical methods, based on Eulerian perturbation theory, are a promising tool to follow the time evolution of cosmological perturbations at small redshifts and at mildly non…
Biases on cosmological parameters by general relativity effects
L. Lopez-Honorez, O. Mena, S. Rigolin
General relativistic corrections to the galaxy power spectrum appearing at the horizon scale, if neglected, may induce biases on the measured values of the cosmological parameters.…
A new approach to cosmological perturbations in f(R) models
Daniele Bertacca, Nicola Bartolo, Sabino Matarrese
We propose an analytic procedure that allows to determine quantitatively the deviation in the behavior of cosmological perturbations between a given f(R) modified gravity model and…
Gamma-Ray and Parsec-Scale Jet Properties of a Complete Sample of Blazars From the MOJAVE Program
M. L. Lister, M. Aller, H. Aller +142
We investigate the Fermi LAT gamma-ray and 15 GHz VLBA radio properties of a joint gamma-ray- and radio-selected sample of AGNs obtained during the first 11 months of the Fermi mis…
The radio/gamma-ray connection in Active Galactic Nuclei in the era of the Fermi Large Area Telescope
M. Ackermann, M. Ajello, A. Allafort +144
We present a detailed statistical analysis of the correlation between radio and gamma-ray emission of the Active Galactic Nuclei (AGN) detected by Fermi during its first year of op…
Simultaneous Planck, Swift, and Fermi observations of X-ray and gamma-ray selected blazars
P. Giommi, G. Polenta, A. Lahteenmaki +92
We present simultaneous Planck, Swift, Fermi, and ground-based data for 105 blazars belonging to three samples with flux limits in the soft X-ray, hard X-ray, and gamma-ray bands.…
An Estimator for statistical anisotropy from the CMB bispectrum
N. Bartolo, E. Dimastrogiovanni, M. Liguori +2
Various data analyses of the Cosmic Microwave Background (CMB) provide observational hints of statistical isotropy breaking. Some of these features can be studied within the framew…
Non-linear dark energy clustering
Stefano Anselmi, Guillermo Ballesteros, Massimo Pietroni
We consider a dark energy fluid with arbitrary sound speed and equation of state and discuss the effect of its clustering on the cold dark matter distribution at the non-linear lev…
Evolution Equation for Non-linear Cosmological Perturbations
Ram Brustein, Antonio Riotto
We present a novel approach, based entirely on the gravitational potential, for studying the evolution of non-linear cosmological matter perturbations. Starting from the perturbed…
Post-Newtonian cosmological dynamics of plane-parallel perturbations and back-reaction
Eleonora Villa, Sabino Matarrese, Davide Maino
We study the general relativistic non-linear dynamics of self-gravitating irrotational dust in a cosmological setting, adopting the comoving and synchronous gauge, where all the eq…
Perturbation Theory of the Cosmological Log-Density Field
Xin Wang, Mark Neyrinck, István Szapudi +5
The matter density field exhibits a nearly lognormal probability density distribution (PDF) after entering into the nonlinear regime. Recently, it has been shown that the shape of…
Constraints on Primordial Non-Gaussianity from Large Scale Structure Probes
Jun-Qing Xia, Carlo Baccigalupi, Sabino Matarrese +2
In this paper we measure the angular power spectra of three high-redshift large-scale structure probes: the radio sources from the NRAO VLA Sky Survey (NVSS), the quasar c…
The Kramers-Moyal Equation of the Cosmological Comoving Curvature Perturbation
Antonio Riotto, Martin S. Sloth
Fluctuations of the comoving curvature perturbation with wavelengths larger than the horizon length are governed by a Langevin equation whose stochastic noise arise from the quantu…
CMB-Galaxy correlation in Unified Dark Matter Scalar Field Cosmologies
Daniele Bertacca, Alvise Raccanelli, Oliver F. Piattella +4
We present an analysis of the cross-correlation between the CMB and the large-scale structure (LSS) of the Universe in Unified Dark Matter (UDM) scalar field cosmologies. We work o…
Gravitational potential evolution in Unified Dark Matter Scalar Field Cosmologies: an analytical approach
Oliver F. Piattella, Daniele Bertacca
We investigate the time evolution of the gravitational potential Phi for a special class of non-adiabatic Unified Dark matter Models described by scalar field lagrangians. These mo…
Conditional Probabilities in the Excursion Set Theory. Generic Barriers and non-Gaussian Initial Conditions
Andrea De Simone, Michele Maggiore, Antonio Riotto
The excursion set theory, where density perturbations evolve stochastically with the smoothing scale, provides a method for computing the dark matter halo mass function. The comput…
Blazars distance indications from Fermi and TeV data
Elisa Prandini, Giacomo Bonnoli, Laura Maraschi +2
A new method to constrain the distance of blazars with unknown redshift using combined observations in the GeV and TeV regimes will be presented. The underlying assumption is that…
PG 1553+113: five years of observations with MAGIC
MAGIC Collaboration, J. Aleksić, E. A. Alvarez +156
We present the results of five years (2005-2009) of MAGIC observations of the BL Lac object PG 1553+113 at very high energies (VHEs, E > 100 GeV). Power law fits of the individual…