Emanuele Castorina
A5078406360- Galaxies: Formation, Evolution, Phenomena
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Radio Astronomy Observations and Technology
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Scientific Research and Discoveries
- Music Technology and Sound Studies
- Computational Physics and Python Applications
- Tropical and Extratropical Cyclones Research
- Adaptive optics and wavefront sensing
- Geophysics and Sensor Technology
- Seismic Waves and Analysis
- Geophysics and Gravity Measurements
- Gamma-ray bursts and supernovae
- Relativity and Gravitational Theory
- Pulsars and Gravitational Waves Research
- Black Holes and Theoretical Physics
- Advanced Fiber Optic Sensors
- Quantum Mechanics and Applications
- Atmospheric Ozone and Climate
- Astrophysics and Star Formation Studies
- Particle accelerators and beam dynamics
University of Milan
2021-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2023-2024
European Organization for Nuclear Research
2020-2022
University of California, Berkeley
2016-2020
Lawrence Berkeley National Laboratory
2016-2020
Scuola Internazionale Superiore di Studi Avanzati
2012-2017
Cicero (Czechia)
2016
Istituto Nazionale di Fisica Nucleare, Sezione di Trieste
2015
University of Pisa
2006-2012
Istituto Nazionale di Fisica Nucleare
2006-2011
[Abridged] We study the abundance and clustering properties of HI at redshifts $z\leqslant5$ using TNG100, a large state-of-the-art magneto-hydrodynamic simulation 75 Mpc/h box size. show that most lies within dark matter halos quantify average mass hosted by M redshift z. find only with circular velocities larger than $\simeq$ 30 km/s contain HI. While density profiles exhibit halo-to-halo scatter, mean are universal across redshift. The in low-mass is mostly located central galaxy, while...
Abstract We present the one-loop 2-point function of biased tracers in redshift space computed with Lagrangian perturbation theory, including a full resummation both long-wavelength (infrared) displacements and associated velocities. The resulting model accurately predicts power spectrum correlation halos mock galaxies from two different sets N-body simulations at percent level for quasi-linear scales, damping baryon acoustic oscillation signal due to bulk motions galaxies. compare this...
We analyse the clustering features of Large Scale Structures (LSS) in presence massive neutrinos, employing a set large-volume, high-resolution cosmological N-body simulations, where neutrinos are treated as separate collisionless particles. The volume 8 h-3 Gpc3, combined with resolution about 8×1010h-1M⊚ for cold dark matter (CDM) component, represents significant improvement over previous simulations neutrino cosmologies. In this work we focus, first place, on analysis nonlinear effects...
By using a suite of large box-size N-body simulations that incorporate massive neutrinos as an extra set particles, we investigate the impact neutrino masses on spatial distribution dark matter haloes and galaxies. We compute bias between overall cold distributions statistical tools such power spectrum two-point correlation function. Overall find scale-dependent scales for cosmologies with neutrinos. However, our results indicate scale-dependence in is reduced if latter computed respect to...
We use a large suite of N-body simulations to study departures from universality in halo abundances and clustering cosmologies with non-vanishing neutrino masses. To this end, we how the mass function bias factors depend on scaling variable σ2(M,z), variance initial matter fluctuation field, rather than M redshift z themselves. show that using cold dark total i.e., σ2cdm(M,z) σ2m(M,z), yields more universal results. Analysis similar conclusions: when large-scale is defined respect power...
Massive neutrinos suppress the growth of structure below their free-streaming scale and leave an imprint on large-scale structure. Measuring this allows us to constrain sum neutrino masses, Mν, a key parameter in particle physics beyond Standard Model. However, degeneracies among cosmological parameters, especially between Mν σ8, limit constraining power standard two-point clustering statistics. In work, we investigate whether can break these with next higher-order correlation function—the...
We present constraints on local primordial non-Gaussianity (PNG), parametrized through fNLloc, using the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Data Release 14 quasar sample. measure and analyze anisotropic clustering of quasars in Fourier space, testing for scale-dependent bias introduced by large scales. derive employ a power spectrum estimator optimal weights that account redshift evolution PNG signal. find −51<fNLloc<21 at 95% confidence level. These are...
We update the ingredients of Gaussian streaming model (GSM) for redshift-space clustering biased tracers using techniques Lagrangian perturbation theory, effective field theory (EFT) and a generalized bias expansion. After relating GSM to cumulant expansion, we present new results real-space correlation function, mean pairwise velocity dispersion including counter terms from EFT through third order in linear density, its leading derivatives shear up second order. discuss connection peaks...
Redshift -space distortions privilege the location of observer in cosmological redshift surveys, breaking translational symmetry underlying theory. This violation statistical homogeneity has consequences for modelling clustering observables, leading to what are frequently called 'wide-angle effects'. We study these effects analytically, computing their signature multipoles configuration and Fourier space. take into account both physical wide-angle contributions as well terms generated by...
An observational program focused on the high redshift ($2<z<6$) Universe has opportunity to dramatically improve over upcoming LSS and CMB surveys measurements of both standard cosmological model its extensions. Using a Fisher matrix formalism that builds upon recent advances in Lagrangian perturbation theory, we forecast constraints for future spectroscopic 21-cm model, curvature, neutrino mass, relativistic species, primordial features, non-Gaussianity, dynamical dark energy, gravitational...
Cosmic inflation provides a window to the highest energy densities accessible in nature, far beyond those achievable any realistic terrestrial experiment. Theoretical insights into inflationary era and its observational probes may therefore shed unique light on physical laws underlying our universe. This white paper describes current theoretical understanding of era, with focus statistical properties primordial fluctuations. In particular, we survey targets for three important signatures...
Measurements of the clustering galaxies in Fourier space, and at low wavenumbers, offer a window into early Universe via possible presence scale dependent bias generated by Primordial Non Gaussianites. On such large scales Newtonian treatment density perturbations might not be sufficient to describe measurements, fully relativistic calculation should employed. The interpretation data is thus further complicated fact that effects break statistical homogeneity isotropy are potentially...
Cosmology offers opportunities to test dark matter independently of its interactions with the standard model. We study imprints long-range forces acting solely in sector on distribution galaxies, so-called large scale structure (LSS). derive strongest constraint such from a combination Planck and BOSS data. Along way we consistently develop, for first time, effective field theory LSS presence new dynamics sector. forecast that future surveys will improve current bound by an order magnitude.
Abstract We present constraints on the amplitude of local Primordial Non-Gaussianities (PNG), f NL , using quasar sample in Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic (eBOSS) Data Release 16 (DR16). analyze power spectrum monopole, testing for presence scale-dependent galaxy bias induced by PNG. Our analysis makes use optimal redshift weights that maximize response to possible non-zero find -4 < 27 at 68% confidence level, which is among strongest bounds with...
We use a suite of N-body simulations that incorporate massive neutrinos as an extra-set particles to investigate their effect on the halo mass function. show for cosmologies with function dark matter haloes selected using spherical overdensity (SO) criterion is well reproduced by fitting formula Tinker et al. (2008) once cold power spectrum considered instead total power, it usually done. The differences between two implementations, i.e. $P_{\rm cdm}(k)$ m}(k)$, are more pronounced large...
The spatial distribution of neutral hydrogen (HI) in the Universe contains a wealth cosmological information. 21 cm emission line can be used to map HI up very high redshift and therefore reveal us something about evolution large scale structures Universe. However little is known abundance clustering properties over cosmic time. Motivated by this, we build an analytic framework where relevant parameters that govern how distributed among dark matter halos fixed using observations. At same...
This white paper envisions a revolutionary post-DESI, post-LSST dark energy program based on intensity mapping of the redshifted 21cm emission line from neutral hydrogen at radio frequencies. The proposed survey has unique capability to quadruple volume Universe surveyed by optical programs, provide percent-level measurement expansion history $z \sim 6$, open window explore physics beyond concordance $Λ$CDM model, and significantly improve precision standard cosmological parameters. In...
Upcoming 21-cm intensity surveys will use the hyperfine transition in emission to map out neutral hydrogen large volumes of universe. Unfortunately, spatial scales are completely contaminated with spectrally smooth astrophysical foregrounds which orders magnitude brighter than signal. This contamination also leaks into smaller radial and angular modes form a foreground wedge, further limiting usefulness observations for different science cases, especially cross-correlations tracers that have...
The Quijote simulations are a set of 44,100 full N-body spanning more than 7,000 cosmological models in the $\{\Omega_{\rm m}, \Omega_{\rm b}, h, n_s, \sigma_8, M_\nu, w \}$ hyperplane. At single redshift contain 8.5 trillions particles over combined volume $(h^{-1}{\rm Gpc})^3$; each simulation follow evolution $256^3$, $512^3$ or $1024^3$ box $1~h^{-1}{\rm Gpc}$ length. Billions dark matter halos and cosmic voids have been identified simulations, whose runs required 35 million core hours....
Our current understanding of the Universe is established through pristine measurements structure in cosmic microwave background (CMB) and distribution shapes galaxies tracing large scale (LSS) Universe. One key ingredient that underlies cosmological observables field sources observed assumed to be initially Gaussian with high precision. Nevertheless, a minimal deviation from Gaussianityis perhaps most robust theoretical prediction models explain Universe; itis necessarily present even...
Inflation may provide unique insight into the physics at highest available energy scales that cannot be replicated in any realistic terrestrial experiment. Features primordial power spectrum are generically predicted a wide class of models inflation and its alternatives, observationally one most overlooked channels for finding evidence non-minimal inflationary models. Constraints from observations cosmic microwave background cover widest range feature frequencies, but sensitive constraints...
Our current understanding of the Universe is established through pristine measurements structure in cosmic microwave background (CMB) and distribution shapes galaxies tracing large scale (LSS) Universe. One key ingredient that underlies cosmological observables field sources observed assumed to be initially Gaussian with high precision. Nevertheless, a minimal deviation from Gaussianityis perhaps most robust theoretical prediction models explain Universe; itis necessarily present even...