124 citations · 482 across the 25 of their papers we have counts for
27 papers
The Boost Operator: Properties, Computation and Applications
Jens Chluba, Andrea Ravenni
The transformation of radiation signals (e.g., photon occupation number and integrated intensity) between moving frames is a common task is physics, astrophysics and cosmology. Her…
The constraining power of the Marked Power Spectrum: an analytical study
Marco Marinucci, Gabriel Jung, Michele Liguori +8
The marked power spectrum - a two-point correlation function of a transformed density field - has emerged as a promising tool for extracting cosmological information from the large…
Cosmological simulations of scale-dependent primordial non-Gaussianity
Marco Baldi, Emanuele Fondi, Dionysios Karagiannis +9
We present the results of a set of cosmological N-body simulations with standard CDM cosmology but characterized by a scale-dependent primordial non-Gaussianity of the local typ…
Quijote-PNG: Optimizing the summary statistics to measure Primordial non-Gaussianity
Gabriel Jung, Andrea Ravenni, Michele Liguori +4
We apply a suite of different estimators to the Quijote-PNG halo catalogues to find the best approach to constrain Primordial non-Gaussianity (PNG) at non-linear cosmological scale…
Taming assembly bias for primordial non-Gaussianity
Emanuele Fondi, Licia Verde, Francisco Villaescusa-Navarro +7
Primordial non-Gaussianity of the local type induces a strong scale-dependent bias on the clustering of halos in the late-time Universe. This signature is particularly promising to…
Clustering of binary black hole mergers: a detailed analysis of the EAGLE+MOBSE simulation
Matteo Peron, Sarah Libanore, Andrea Ravenni +2
We perform a detailed study of the cosmological bias of gravitational gave (GW) events produced by binary black hole mergers (BBHM). We start from a BBHM distribution modeled insid…
Quijote-PNG: The Information Content of the Halo Mass Function
Gabriel Jung, Andrea Ravenni, Marco Baldi +8
We study signatures of primordial non-Gaussianity (PNG) in the redshift-space halo field on non-linear scales, using a combination of three summary statistics, namely the halo mass…
Spectro-spatial evolution of the CMB III: transfer functions, power spectra and Fisher forecasts
Thomas Kite, Andrea Ravenni, Jens Chluba
In this paper, we provide the first computations for the distortion transfer functions of the cosmic microwave background (CMB) in the perturbed Universe, following up on paper I a…
Spectro-spatial evolution of the CMB II: generalised Boltzmann hierarchy
Jens Chluba, Andrea Ravenni, Thomas Kite
In this paper, we formulate a generalised photon Boltzmann hierarchy that allows us to model the evolution and creation of spectral distortion anisotropies in the early Universe. W…
Spectro-spatial evolution of the CMB I: discretisation of the thermalisation Green's function
Jens Chluba, Thomas Kite, Andrea Ravenni
Spectral distortions of the cosmic microwave background (CMB) have been recognized as an important future probe of the early Universe. Existing theoretical studies primarily focuse…
Non-Gaussianity constraints from Planck spectral distortion cross-correlations
Aditya Rotti, Andrea Ravenni, Jens Chluba
Primordial non-Gaussianity can source -distortion anisotropies that are correlated with the large-scale temperature and polarization signals of the cosmic microwave background (…
Bridging the Gap: Spectral Distortions meet Gravitational Waves
Thomas Kite
This talk has the goal of introducing two upcoming exciting avenues of discovery in precision Cosmology: spectral distortions (SDs) and gravitational waves (GWs). The former signal…
Leverage on small-scale primordial non-Gaussianity through cross-correlations between CMB -mode and -distortion anisotropies
Mathieu Remazeilles, Andrea Ravenni, Jens Chluba
Multi-field inflation models and non-Bunch-Davies vacuum initial conditions both predict sizeable non-Gaussian primordial perturbations and anisotropic -type spectral distortion…
Clarifying transfer function approximations for the large-scale gravitational wave background in CDM
Thomas Kite, Jens Chluba, Andrea Ravenni +1
The primordial gravitational wave background (GWB) offers an exciting future avenue of discovery for new physics. Its information content encodes multiple eras in the early Univers…
Bridging the gap: spectral distortions meet gravitational waves
Thomas Kite, Andrea Ravenni, Subodh P. Patil +1
Gravitational waves (GWs) have the potential to probe the entirety of cosmological history due to their nearly perfect decoupling from the thermal bath and any intervening matter a…
Breaking degeneracies with the Sunyaev-Zeldovich full bispectrum
Andrea Ravenni, Matteo Rizzato, Slađana Radinović +3
Non-Gaussian (NG) statistics of the thermal Sunyaev-Zeldovich (tSZ) effect carry significant information which is not contained in the power spectrum. Here, we perform a joint Fish…
The double Compton process in astrophysical plasmas
Andrea Ravenni, Jens Chluba
We study the double Compton (DC) process for a wide range of particle energies, extending previous treatments well beyond the soft photon limit, employing both numerical and analyt…
Thermalization of large energy release in the early Universe
Jens Chluba, Andrea Ravenni, Sandeep Kumar Acharya
Spectral distortions of the cosmic microwave background (CMB) provide a unique tool for learning about the early phases of cosmic history, reaching deep into the primordial Univers…
The integrated angular bispectrum
Gabriel Jung, Filippo Oppizzi, Andrea Ravenni +1
We study the position-dependent power spectrum and the integrated bispectrum statistic for 2D cosmological fields on the sphere (integrated angular bispectrum). First, we derive a…
Improved calculations of electron-ion Bremsstrahlung Gaunt factors for astrophysical applications
Jens Chluba, Andrea Ravenni, Boris Bolliet
Electron-ion Bremsstrahlung (free-free) emission and absorption occur in many astrophysical plasmas for a wide range of physical conditions. This classical problem has been studied…
New Horizons in Cosmology with Spectral Distortions of the Cosmic Microwave Background
J. Chluba, M. H. Abitbol, N. Aghanim +27
Voyage 2050 White Paper highlighting the unique science opportunities using spectral distortions of the cosmic microwave background (CMB). CMB spectral distortions probe many proce…
Microwave Spectro-Polarimetry of Matter and Radiation across Space and Time
Jacques Delabrouille, Maximilian H. Abitbol, Nabila Aghanim +77
This paper discusses the science case for a sensitive spectro-polarimetric survey of the microwave sky. Such a survey would provide a tomographic and dynamic census of the three-di…
Spectral Distortions of the CMB as a Probe of Inflation, Recombination, Structure Formation and Particle Physics
J. Chluba, A. Kogut, S. P. Patil +98
Following the pioneering observations with COBE in the early 1990s, studies of the cosmic microwave background (CMB) have focused on temperature and polarization anisotropies. CMB…
Exploring compensated isocurvature perturbations with CMB spectral distortion anisotropies
Taku Haga, Keisuke Inomata, Atsuhisa Ota +1
We develop a linear perturbation theory for the spectral -distortions of the cosmic microwave background (CMB). The -distortions generated during the recombination epoch are…