Marco Raveri
A5064772769- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Astronomy and Astrophysical Research
- Dark Matter and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Black Holes and Theoretical Physics
- Geophysics and Gravity Measurements
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Astrophysical Phenomena and Observations
- Computational Physics and Python Applications
- Adaptive optics and wavefront sensing
- Gaussian Processes and Bayesian Inference
- CCD and CMOS Imaging Sensors
- Pulsars and Gravitational Waves Research
- Particle physics theoretical and experimental studies
- Statistical and numerical algorithms
- Astrophysics and Star Formation Studies
- Astro and Planetary Science
- Relativity and Gravitational Theory
- Neutrino Physics Research
- Complex Systems and Time Series Analysis
- Isotope Analysis in Ecology
Istituto Nazionale di Fisica Nucleare, Sezione di Genova
2023-2025
IIT@MIT
2024
Genoa (Brazil)
2024
University of Pennsylvania
2020-2023
Columbia University
2023
University of Michigan–Ann Arbor
2023
University of Hull
2023
University of Genoa
2022-2023
University of Chicago
2017-2022
University of Trieste
2014-2021
This book lays out the scientific goals to be addressed by next-generation ground-based cosmic microwave background experiment, CMB-S4, envisioned consist of dedicated telescopes at South Pole, high Chilean Atacama plateau and possibly a northern hemisphere site, all equipped with new superconducting cameras. CMB-S4 will dramatically advance cosmological studies crossing critical thresholds in search for B-mode polarization signature primordial gravitational waves, determination number...
This work and its companion paper, Amon et al. (2021), present cosmic shear measurements cosmological constraints from over 100 million source galaxies in the Dark Energy Survey (DES) Year 3 data. We constrain lensing amplitude parameter $S_8\equiv\sigma_8\sqrt{\Omega_\textrm{m}/0.3}$ at 3% level $\Lambda$CDM: $S_8=0.759^{+0.025}_{-0.023}$ (68% CL). Our constraint is 2% when using angular scale cuts that are optimized for $\Lambda$CDM analysis: $S_8=0.772^{+0.018}_{-0.017}$ With alone, we...
We discuss the ability of a dark fluid becoming relevant around time matter-radiation equality to significantly relieve tension between local measurements Hubble constant and cosmic microwave background (CMB) inference, within $\mathrm{\ensuremath{\Lambda}}\mathrm{CDM}$ model. show that gravitational impact acoustic oscillations in balance effects on CMB result an improved fit themselves while simultaneously raising constant. The required favors model where is scalar field converts its...
We implement the effective field theory (EFT) approach to dark energy and modified gravity in public Einstein-Boltzmann solver CAMB. The resulting code, which we dub EFTCAMB, is a powerful versatile tool that can be used for several objectives. It employed evolve full dynamics of linear scalar perturbations broad range single model, once model interest mapped into EFT formalism. offers numerical implementation as model-independent framework test on cosmological scales. EFTCAMB has built-in...
The success of present and future cosmological studies is tied to the ability detect discrepancies in complex data sets within framework a model. Tensions caused by presence unknown systematic effects need be isolated corrected increase overall accuracy parameter constraints, while due new physical phenomena promptly identified. We develop full set estimators internal mutual agreement disagreement, whose strengths complement each other. These allow take into account effect prior information...
We present constraints on extensions of the minimal cosmological models dominated by dark matter and energy, $\Lambda$CDM $w$CDM, using a combined analysis galaxy clustering weak gravitational lensing from first-year data Dark Energy Survey (DES Y1) in combination with external data. consider four energy-dominated scenarios: 1) nonzero curvature $\Omega_k$, 2) number relativistic species $N_{\rm eff}$ different standard value 3.046, 3) time-varying equation-of-state energy described...
Late times dark energy transitions at redshifts $z \ll 0.1$ can raise the predicted value of Hubble constant to SH0ES value, $74.03\pm 1.42$ (km s$^{-1}$ Mpc$^{-1})$ or more, while providing an equally good fit as $Λ$CDM $67.73 \pm 0.41$ higher redshift data, in particular from cosmic microwave background and baryon acoustic oscillations. These models however do not fully resolve true source tension between distance ladder high observations: local calibration supernovae luminosities well out...
Determining the distribution of redshifts galaxies observed by wide-field photometric experiments like Dark Energy Survey is an essential component to mapping matter density field with gravitational lensing. In this work we describe methods used assign individual weak lensing source from Year 3 Weak Lensing Source Catalogue four tomographic bins and estimate redshift distributions in these bins. As first application data, validate that assumptions made apply DES Y3 develop a full treatment...
Early dark energy (EDE) offers a particularly interesting theoretical approach to the Hubble tension, albeit one that introduces its own set of challenges, including new ``why then'' problem related EDE injection time at matter-radiation equality, and mild worsening large-scale structure (LSS) tension. Both these challenges center on properties matter, which becomes dominant component Universe is also responsible for seeding LSS. Motivated by this, we present potential couplings between...
We introduce EFTCAMB/EFTCosmoMC as publicly available patches to the commonly used CAMB/CosmoMC codes. briefly describe structure of codes, their applicability and main features. To illustrate use these patches, we obtain constraints on parametrized pure EFT designer $f(R)$ models, both $\Lambda$CDM $w$CDM background expansion histories, using data from Planck temperature lensing potential spectra, WMAP low-$\ell$ polarization spectra (WP), baryon acoustic oscillation (BAO). Upon inspecting...
We present the data-driven late-time reconstruction of gravitational theories and dark energy models on cosmological scales. showcase power probes at constraining these quantify knowledge their properties that can be acquired through state art data. This exploits effective field theory approach to modified gravity phenomenology, which compresses freedom in defining such into a finite set functions reconstructed across cosmic times using consider several model classes described within this...
ABSTRACT We describe and test the fiducial covariance matrix model for combined two-point function analysis of Dark Energy Survey Year 3 (DES-Y3) data set. Using a variety new ansatzes modelling testing, we validate assumptions approximations this model. These include assumption Gaussian likelihood, trispectrum contribution to covariance, impact evaluating at wrong set parameters, masking survey geometry, deviations from Poissonian shot noise, galaxy weighting schemes, other sub-dominant...
ABSTRACT We present reconstructed convergence maps, mass from the Dark Energy Survey (DES) third year (Y3) weak gravitational lensing data set. The maps are weighted projections of density field (primarily dark matter) in foreground observed galaxies. use four reconstruction methods, each is a maximum posteriori estimate with different model for prior probability map: Kaiser–Squires, null B-mode prior, Gaussian and sparsity prior. All methods implemented on celestial sphere to accommodate...
We constrain cosmological and galaxy-bias parameters using the combination of galaxy clustering galaxy-galaxy lensing measurements from Dark Energy Survey Year-3 data. describe our modeling framework, choice scales analyzed, validating their robustness to theoretical uncertainties in small-scale by analyzing simulated Using a linear bias model redMaGiC sample, we obtain constraints on matter density be $\Omega_{\rm m} = 0.325^{+0.033}_{-0.034}$. also implement non-linear probe smaller that...
Quantifying tensions -- inconsistencies amongst measurements of cosmological parameters by different experiments has emerged as a crucial part modern data analysis. Statistically-significant between two or probes may indicate new physics extending beyond the standard model and need to be promptly identified. We apply several tension estimators proposed in literature Dark Energy Survey (DES) large-scale structure measurement Planck cosmic microwave background data. first evaluate...
We constrain the matter density $\Omega_{\mathrm{m}}$ and amplitude of fluctuations $\sigma_8$ within $\Lambda$CDM cosmological model with shear peak statistics angular convergence power spectra using mass maps constructed from first three years data Dark Energy Survey (DES Y3). use tomographic statistics, including cross-peaks: counts calculated on created by taking a harmonic space product two redshift bins. Our analysis follows forward-modelling scheme to create likelihood these N-body...
The cosmological information extracted from photometric surveys is most robust when multiple probes of the large scale structure Universe are used. Two sensitive clustering galaxies and tangential shear background galaxy shapes produced by those foreground galaxies, so-called galaxy-galaxy lensing. Combining measurements these two two-point functions leads to constraints that independent way trace matter (the bias factor). optimal choice foreground, or lens, governed joint, but conflicting...
We present cosmological constraints from the analysis of angular power spectra cosmic shear maps based on data first three years observations by Dark Energy Survey (DES Y3). Our measurements are pseudo-$C_\ell$ method and offer a view complementary to that two-point correlation functions in real space, as two estimators known compress select Gaussian information different ways, due scale cuts. They may also be differently affected systematic effects theoretical uncertainties, such baryons...