S. Matarrese
A5016282067- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Astrophysics and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Astrophysics and Star Formation Studies
- Astronomy and Astrophysical Research
- Scientific Research and Discoveries
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Solar and Space Plasma Dynamics
- Relativity and Gravitational Theory
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Superconducting and THz Device Technology
- Advanced Differential Geometry Research
- Advanced Thermodynamics and Statistical Mechanics
- Computational Physics and Python Applications
- Particle physics theoretical and experimental studies
- Atmospheric Ozone and Climate
- Statistical and numerical algorithms
- Calibration and Measurement Techniques
- Radioactive Decay and Measurement Techniques
University of Padua
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2015-2024
Gran Sasso Science Institute
2015-2024
Osservatorio Astronomico di Padova
2016-2024
Institut de Recherche en Astrophysique et Planétologie
2024
Campbell Collaboration
2023
Istituto Nazionale di Fisica Nucleare
2009-2023
Istituto Nazionale di Fisica Nucleare, Galileo Galilei Institute for Theoretical Physics
1997-2019
University of California, Berkeley
2018
Centre National de la Recherche Scientifique
2018
The Einstein Telescope (ET), a proposed European ground-based gravitational-wave detector of third-generation, is an evolution second-generation detectors such as Advanced LIGO, Virgo, and KAGRA which could be operating in the mid 2030s. ET will explore universe with gravitational waves up to cosmological distances. We discuss its main scientific objectives potential for discoveries astrophysics, cosmology fundamental physics.
The outstanding cosmological problems (horizon, flatness, . .) which may be solved by the usual inflationary models also find a solution in frame of ``generalized'' cosmology is characterized suitable phase accelerated expansion. exponential growth scale factor S just particular case such general idea. Following this line thought, we study some detail simple model grows like S\ensuremath{\sim}${t}^{p}$, with p constant greater than one, call power-law inflation (PLI). Some properties PLI...
The matter power spectrum at comoving scales of $(1\ensuremath{-}40){h}^{\ensuremath{-}1}\text{ }\text{ }\mathrm{Mpc}$ is very sensitive to the presence Warm Dark Matter (WDM) particles with large free-streaming lengths. We present constraints on mass WDM from a combined analysis inferred samples high-resolution high signal-to-noise Lyman-$\ensuremath{\alpha}$ forest data Kim et al. (2004) and Croft (2002) cosmic microwave background WMAP. obtain lower limit...
The evolution of galaxy clustering from z=0 to z≃4.5 is analysed using the angular correlation function and photometric redshift distribution galaxies brighter than IAB 28.5 in Hubble Deep Field North. reliability estimates discussed on basis available spectroscopic redshifts, comparing different codes investigating effects errors. bins which properties are measured then optimized take into account uncertainties redshifts. results show that comoving length r0 has a small decrease range 0≲z≲1...
We compute the bispectrum of 2dF Galaxy Redshift Survey (2dFGRS) and use it to measure bias parameter galaxies. This quantifies strength clustering galaxies relative mass in Universe. By analysing 80 × 106 triangle configurations wavenumber range 0.1 < k 0.5 h Mpc−1 (i.e. on scales roughly between 5 30 h−1 Mpc) we find that linear is consistent with unity: b1= 1.04 ± 0.11, quadratic (non-linear) zero: b2=−0.054 0.08. Thus, at least large scales, optically selected do indeed trace underlying...
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E -mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). compare estimates obtained from separable template-fitting, binned, optimal modal bispectrum estimators, finding consistent values for local, equilateral, orthogonal amplitudes. Our combined analysis produces following final results: f NL local = −0.9 ± 5.1; equil −26 47; ortho −38 24 (68% CL, statistical). These results...
Analysis of the Planck 2018 data set indicates that statistical properties cosmic microwave background (CMB) temperature anisotropies are in excellent agreement with previous studies using 2013 and 2015 releases. In particular, they consistent Gaussian predictions $Λ$CDM cosmological model, yet also confirm presence several so-called "anomalies" on large angular scales. The novelty current study, however, lies being a first attempt at comprehensive analysis statistics polarization signal...
We analyze the temperature three--point correlation function and skewness of Cosmic Microwave Background (CMB), providing general relations in terms multipole coefficients. then focus on applications to large angular scale anisotropies, such as those measured by {\em COBE} DMR, calculating contribution these quantities from primordial, inflation generated, scalar perturbations, via Sachs--Wolfe effect. Using techniques stochastic we are able provide a {\it universal} expression for ensemble...
It has long been known how to analytically relate the clustering properties of collapsed structures (halos) those underlying dark matter distribution for Gaussian initial conditions. Here we apply same approach physically motivated non-Gaussian models. The techniques use were developed in 1980s deal with peaks density fields. description halos conditions recently received renewed interest, by forthcoming large galaxy and cluster surveys. For inflationary-motivated non-Gaussianities, find an...
We investigate the potential for LISA space-based interferometer to detect stochastic gravitational wave background produced from different mechanisms during inflation. Focusing on well-motivated scenarios, we study resulting contributions particle production inflation, inflationary spectator fields with varying speed of sound, effective field theories inflation specific patterns symmetry breaking and models leading formation primordial black holes. The projected sensitivities are used in a...
We summarize the utility of precise cosmic microwave background (CMB) polarization measurements as probes physics inflation. focus on prospects for using CMB to differentiate various inflationary mechanisms. In particular, a detection primordial B‐mode would demonstrate that inflation occurred at very high energy scale, and inflaton traversed super‐Planckian distance in field space. explain how such or constraint illuminate aspects Planck scale. Moreover, can constrain scale‐dependence...
This paper presents the High Frequency Instrument (HFI) data processing procedures for Planck 2018 release. Major improvements in mapmaking have been achieved since previous 2015 They enabled first significant measurement of reionization optical depth parameter using HFI data. an extensive analysis systematic effects, including use simulations to facilitate their removal and characterize residuals. The polarized data, which presented a number known problems release, are very significantly...
Using the Planck 2015 data release (PR2) temperature maps, we separate Galactic thermal dust emission from cosmic infrared background (CIB) anisotropies. For this purpose, implement a specifically tailored component-separation method, so-called generalized needlet internal linear combination (GNILC) which uses spatial information (the angular power spectra) to disentangle and CIB We produce significantly improved all-sky maps of emission, with reduced contamination, at 353, 545, 857 GHz. By...
We present the Planck Sky Model (PSM), a parametric model for generation of all-sky, few arcminute resolution maps sky emission at submillimetre to centimetre wavelengths, in both intensity and polarisation. Several options are implemented cosmic microwave background, Galactic diffuse (synchrotron, free-free, thermal spinning dust, CO lines), H-II regions, extragalactic radio sources, dusty galaxies, kinetic Sunyaev-Zeldovich signals from clusters galaxies. Each component is simulated by...
PRISM (Polarized Radiation Imaging and Spectroscopy Mission) was proposed to ESA in May 2013 as a large-class mission for investigating within the framework of Cosmic Vision program set important scientific questions that require high resolution, sensitivity, full-sky observations sky emission at wavelengths ranging from millimeter-wave far-infrared. PRISM's main objective is explore distant universe, probing cosmic history very early times until now well structures, distribution matter,...
We analyse the Planck full-mission cosmic microwave background (CMB) temperature and E-mode polarization maps to obtain constraints on primordial non-Gaussianity (NG). compare estimates obtained from separable template-fitting, binned, modal bispectrum estimators, finding consistent values for local, equilateral, orthogonal amplitudes. Our combined analysis produces following results: f_NL^local = -0.9 +\- 5.1; f_NL^equil -26 47; f_NL^ortho - 38 24 (68%CL, statistical). These results include...
Modifications of General Relativity leave their imprint both on the cosmic expansion history through a non-trivial dark energy equation state, and evolution cosmological perturbations in scalar tensor sectors. In particular, modification sector gives rise to notion gravitational-wave (GW) luminosity distance, different from standard electromagnetic that can be studied with sirens at GW detectors such as LISA or third-generation ground based experiments. We discuss predictions for modified...
We present the NPIPE processing pipeline, which produces calibrated frequency maps in temperature and polarization from data Planck Low Frequency Instrument (LFI) High (HFI) using high-performance computers. represents a natural evolution of previous analysis efforts, combines some most powerful features separate LFI HFI pipelines. For example, following 2018 procedure, uses foreground priors during calibration stage order to break scanning-induced degeneracies. Similarly, employs...