M. Liguori
A5106483503- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Astrophysics and Star Formation Studies
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Geophysics and Gravity Measurements
- Astronomy and Astrophysical Research
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Relativity and Gravitational Theory
- Atmospheric Ozone and Climate
- Superconducting and THz Device Technology
- Statistical and numerical algorithms
- Pulsars and Gravitational Waves Research
- Particle physics theoretical and experimental studies
- Radioactive Decay and Measurement Techniques
- Astro and Planetary Science
- Calibration and Measurement Techniques
- Astronomical Observations and Instrumentation
- Blind Source Separation Techniques
- Quantum Electrodynamics and Casimir Effect
University of Padua
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Padova
2015-2024
Osservatorio Astronomico di Padova
2016-2024
University of Trento
2023-2024
Istituto Nazionale di Fisica Nucleare
2015-2020
University College London
2018
Centre National de la Recherche Scientifique
2012-2018
University of KwaZulu-Natal
2018
Université Paris-Sud
2018
University of Milan
2018
We present cosmological parameter results from the final full-mission Planck measurements of CMB anisotropies. find good consistency with standard spatially-flat 6-parameter $\Lambda$CDM cosmology having a power-law spectrum adiabatic scalar perturbations (denoted "base $\Lambda$CDM" in this paper), polarization, temperature, and lensing, separately combination. A combined analysis gives dark matter density $\Omega_c h^2 = 0.120\pm 0.001$, baryon $\Omega_b 0.0224\pm 0.0001$, spectral index...
We report on the implications for cosmic inflation of 2018 Release Planck CMB anisotropy measurements. The results are fully consistent with two previous cosmological releases, but have smaller uncertainties thanks to improvements in characterization polarization at low and high multipoles. temperature, polarization, lensing data determine spectral index scalar perturbations be $n_\mathrm{s}=0.9649\pm 0.0042$ 68% CL show no evidence a scale dependence $n_\mathrm{s}.$ Spatial flatness is...
Author(s): Aghanim, N; Akrami, Y; Ashdown, M; Aumont, J; Baccigalupi, C; Ballardini, Banday, AJ; Barreiro, RB; Bartolo, Basak, S; Battye, R; Benabed, K; Bernard, JP; Bersanelli, Bielewicz, P; Bock, JJ; Bond, JR; Borrill, Bouchet, FR; Boulanger, F; Bucher, Burigana, Butler, RC; Calabrese, E; Cardoso, JF; Carron, Challinor, A; Chiang, HC; Chluba, Colombo, LPL; Combet, Contreras, D; Crill, BP; Cuttaia, De Bernardis, Zotti, G; Delabrouille, Delouis, JM; DI Valentino, DIego, Dore, O; Douspis,...
We describe the legacy Planck cosmic microwave background (CMB) likelihoods derived from 2018 data release. The overall approach is similar in spirit to one retained for 2013 and 2015 release, with a hybrid method using different approximations at low ( ℓ < 30) high ≥ multipoles, implementing several methodological data-analysis refinements compared previous releases. With more realistic simulations, better correction modelling of systematic effects, we can now make full use CMB...
We present measurements of the cosmic microwave background (CMB) lensing potential using final Planck 2018 temperature and polarization data. Using maps filtered to account for noise anisotropy, we increase significance detection in from 5 σ 9 . Combined with temperature, is detected at 40 an extensive set tests robustness lensing-potential power spectrum, construct a minimum-variance estimator likelihood over multipoles 8 ≤ L 400 (extending range lower compared 2015), which use constrain...
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 investigate constraints on cosmic reionization extracted from the Planck microwave background (CMB) data. combine CMB anisotropy data in temperature with low-multipole polarization to fit LCDM models various parameterizations of history. obtain a Thomson optical depth tau=0.058 +/- 0.012 for commonly adopted instantaneous model. This confirms, only anisotropies, low value suggested by combining 2015 results other sets and also reduces uncertainties. reconstruct history ionization fraction...
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...
The standard cosmology is based on general relativity (GR) and includes dark matter energy predicts a fixed relationship between the gravitational potentials responsible for lensing overdensity. Alternative theories of gravity often make different predictions. We propose set measurements which can test this relationship, thereby distinguishing or models in differs from GR. Planned surveys will be able to measure E(G), an observational quantity whose expectation value equal ratio Laplacian...
This paper describes the identification, modelling, and removal of previously unexplained systematic effects in polarization data Planck High Frequency Instrument (HFI) on large angular scales, including new mapmaking calibration procedures, more complete end-to-end simulations, a set robust internal consistency checks resulting maps. These maps, at 100, 143, 217, 353 GHz, are early versions those that will be released final form later 2016. The improvements allow us to determine cosmic...
We present full-sky maps of the cosmic microwave background (CMB) and polarized synchrotron thermal dust emission, derived from third set Planck frequency maps. These products have significantly lower contamination instrumental systematic effects than previous versions. The methodologies used to derive these follow those described in earlier papers, adopting four methods (Commander, NILC, SEVEM, SMICA) extract CMB component, as well three GNILC, astrophysical components. Our revised...
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...
We present measurements of the cosmic microwave background (CMB) lensing potential using final $\textit{Planck}$ 2018 temperature and polarization data. increase significance detection in maps from $5\,\sigma$ to $9\,\sigma$. Combined with temperature, is detected at $40\,\sigma$. an extensive set tests robustness lensing-potential power spectrum, construct a minimum-variance estimator likelihood over multipoles $8 \le L 400$. find good consistency between constraints results CMB spectra...
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,...