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38 papers · 2 filters
Euclid: Field-level inference of primordial non-Gaussianity and cosmic initial conditions
A. Andrews, J. Jasche, G. Lavaux +147
A primary target of the \Euclid space mission is to constrain early-universe physics by searching for deviations from a primordial Gaussian random field. A significant detection of…
Non-linear effects on the Cosmological Gravitational Wave Background anisotropies
Alina Mierna, Sabino Matarrese, Nicola Bartolo +1
The Cosmological Gravitational Wave Background (CGWB) anisotropies contain valuable information about the physics of the early universe. Given that General Relativity is intrinsica…
Black holes and gravitational waves from phase transitions in realistic models
Marek Lewicki, Piotr Toczek, Ville Vaskonen
We study realistic models predicting primordial black hole (PBH) formation from density fluctuations generated in a first-order phase transition. We show that the second-order corr…
Measuring our peculiar velocity from spectroscopic redshift surveys
Mohamed Yousry Elkhashab, Cristiano Porciani, Daniele Bertacca
Our peculiar velocity imprints a dipole on galaxy density maps derived from redshift surveys. The dipole gives rise to an oscillatory signal in the multipole moments of the observe…
Statistics of the supermassive black hole gravitational wave background anisotropy
Juhan Raidal, Juan Urrutia, Ville Vaskonen +1
We study the statistical properties of the anisotropy in the gravitational wave (GW) background originating from supermassive black hole (SMBH) binaries. We derive the distribution…
Cross-Correlating the Universe: The Gravitational Wave Background and Large-Scale Structure
Federico Semenzato, J. Andrew Casey-Clyde, Chiara M. F. Mingarelli +4
The nature of the gravitational wave background (GWB) is a key question in modern astrophysics and cosmology, with significant implications for understanding the structure and evol…
What is the origin of the JWST SMBHs?
John Ellis, Malcolm Fairbairn, Juan Urrutia +1
We present a new semi-analytical model for the evolution of galaxies and supermassive black holes (SMBHs) that is based on the extended Press-Schechter formalism and phenomenologic…
Breaking parity: the case of the trispectrum from chiral scalar-tensor theories of gravity
Tommaso Moretti, Nicola Bartolo, Alessandro Greco
Recently, possible hints of parity violation have been observed in the connected galaxy four-point correlation function. Although the true origin of the signal from the analysis ha…
Euclid preparation: 6x2 pt analysis of Euclid's spectroscopic and photometric data sets
Euclid Collaboration, L. Paganin, M. Bonici +252
We present cosmological parameter forecasts for the Euclid 6x2pt statistics, which include the galaxy clustering and weak lensing main probes together with previously neglected cro…
Euclid preparation. L. Calibration of the linear halo bias in CDM cosmologies
Euclid Collaboration, T. Castro, A. Fumagalli +253
The Euclid mission, designed to map the geometry of the dark Universe, presents an unprecedented opportunity for advancing our understanding of the cosmos through its photometric g…
Analytic results in aligned axion inflation
Federico Greco, Marco Peloso
The original model of axion natural inflation produces a tensor-to-scalar ratio above the experimental limit. Aligned axion inflation admits inflationary trajectories that originat…
Euclid preparation: Determining the weak lensing mass accuracy and precision for galaxy clusters
Euclid Collaboration, L. Ingoglia, M. Sereno +279
We investigate the level of accuracy and precision of cluster weak-lensing (WL) masses measured with the \Euclid data processing pipeline. We use the DEMNUni-Cov -body simulatio…
Cosmic topology. Part Ic. Limits on lens spaces from circle searches
Samanta Saha, Craig J. Copi, Glenn D. Starkman +11
Cosmic microwave background (CMB) temperature and polarization observations indicate that in the best-fit Cold Dark Matter model of the Universe, the local geometry is consiste…
Euclid preparation. LIX. Angular power spectra from discrete observations
Euclid Collaboration, N. Tessore, B. Joachimi +266
We present the framework for measuring angular power spectra in the Euclid mission. The observables in galaxy surveys, such as galaxy clustering and cosmic shear, are not continuou…
Searching for blue in the dark
Jessie de Kruijf, Eleonora Vanzan, Kimberly K. Boddy +2
The primordial power spectrum of curvature perturbations has been well-measured on large scales but remains fairly unconstrained at smaller scales, where significant deviations fro…
The effect of quantum decoherence on inflationary gravitational waves
Jessie de Kruijf, Nicola Bartolo
The theory of inflation provides a mechanism to explain the structures we observe today in the Universe, starting from quantum-mechanically generated fluctuations. However, this le…
Euclid preparation. Exploring the properties of proto-clusters in the Simulated Euclid Wide Survey
Euclid Collaboration, H. Böhringer, G. Chon +263
Galaxy proto-clusters are receiving an increased interest since most of the processes shaping the structure of clusters of galaxies and their galaxy population are happening at ear…
Euclid and KiDS-1000: Quantifying the impact of source-lens clustering on cosmic shear analyses
L. Linke, S. Unruh, A. Wittje +150
The transition from current Stage-III surveys such as the Kilo-Degree Survey (KiDS) to the increased area and redshift range of Stage IV surveys such as Euclid will significantly i…
Conversations in the dark: cross-correlating birefringence and LSS to constrain axions
S. Arcari, N. Bartolo, A. Greco +3
Unveiling the dark sector of the Universe is one of the leading efforts in theoretical physics. Among the many models proposed, axions and axion-like particles stand out due to the…
Euclid preparation. Sensitivity to non-standard particle dark matter model
Euclid Collaboration, J. Lesgourgues, J. Schwagereit +249
The Euclid mission of the European Space Agency will provide weak gravitational lensing and galaxy clustering surveys that can be used to constrain the standard cosmological model…
Curbing PBHs with PTAs
A. J. Iovino, G. Perna, A. Riotto +1
Sizeable primordial curvature perturbations needed to seed a population of primordial black holes (PBHs) will be accompanied by a scalar-induced gravitational wave signal that can…
The full-sky Spherical Fourier-Bessel power spectrum in general relativity
Federico Semenzato, Daniele Bertacca, Alvise Raccanelli
We present a formalism for analyzing galaxy clustering on the lightcone with the 2-point correlation in the Spherical Fourier-Bessel (SFB) formalism, which is a natural choice to a…
Eccentricity effects on the supermassive black hole gravitational wave background
Juhan Raidal, Juan Urrutia, Ville Vaskonen +1
We studied how eccentricity affects the gravitational wave (GW) spectrum from supermassive black hole (SMBH) binaries. We developed a fast and accurate semi-analytic method for com…
Gravitational wave background from primordial black holes in globular clusters
Eleonora Vanzan, Sarah Libanore, Lorenzo Valbusa Dall'Armi +2
Primordial black holes still represent a viable candidate for a significant fraction, if not for the totality, of dark matter. If these compact objects have masses of order tens of…