P. Carrilho
A5017421417- Particle physics theoretical and experimental studies
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Cosmology and Gravitation Theories
- Galaxies: Formation, Evolution, Phenomena
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Astronomy and Astrophysical Research
- Particle Detector Development and Performance
- Computational Physics and Python Applications
- Solar and Space Plasma Dynamics
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Solid-state spectroscopy and crystallography
- Advanced NMR Techniques and Applications
- Atomic and Subatomic Physics Research
- Optical Polarization and Ellipsometry
- Advanced Thermodynamics and Statistical Mechanics
- Crystallography and Radiation Phenomena
- Advanced Differential Geometry Research
- Advanced Electrical Measurement Techniques
- Advancements in Photolithography Techniques
- Relativity and Gravitational Theory
University of Edinburgh
2022-2024
Royal Observatory
2022-2024
UK Astronomy Technology Centre
2022-2023
Queen Mary University of London
2016-2022
Instituto Superior Técnico
2012
Universidade Federal do Rio de Janeiro
1988-2007
Karlsruhe Institute of Technology
1995
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
1994
University of Bologna
1994
European Organization for Nuclear Research
1994
We propose a regularization procedure for the novel Einstein-Gauss-Bonnet theory of gravity, which produces set field equations that can be written in closed form four dimensions. Our method consists introducing counter term into action, and does not rely on embedding or compactification any higher-dimensional spaces. This counterterm is sufficient to cancel divergence action would otherwise occur, exactly reproduces trace original formulation theory. All other display an extra scalar...
Abstract We analyse the BOSS DR12 multipoles of galaxy power spectrum jointly with measurements BAO scale for three different models dark energy. use recent performed a windowless estimator, and an independent fast pipeline based on EFTofLSS modelling implemented via FAST-PT algorithm to compute integrals redshift-space loop corrections. accelerate our analysis further by using bacco linear emulator instead Boltzmann solver. perform two sets analyses: one including 3 σ Planck priors A s n ,...
We consider the steepest rate at which power spectrum from single field inflation can grow, with aim of providing a simple explanation for ${k}^{4}$ growth found recently. With this in hand we show that slightly steeper ${k}^{5}(\mathrm{log}\text{ }k{)}^{2}$ is, fact, possible. Moreover, argue after steep cannot immediately decay, but must remain large $k$ modes exit during $\ensuremath{\sim}2$ $e$-fold period. also briefly how strong affect spectral index longer wavelengths preceding and...
Working in an idealised framework which a series of phases evolution defined by the second slow-roll parameter $\eta$ are matched together, we calculate reduced bispectrum, $f_{\rm NL}$, for models inflation with large peak their primordial power spectra. We find NL}$ is typically approximately constant over scales at located, and provide analytic approximation this value. This allows us to identify conditions under enough have significant impact on resulting production black holes (PBHs)...
We study multifield inflation in scenarios where the fields are coupled non-minimally to gravity via ξI(ϕI)n gμνRμν, ξI coupling constants, ϕI driving inflation, gμν space-time metric, Rμν Ricci tensor, and n>0. consider so-called α-attractor models two formulations of gravity: usual metric case Rμν=Rμν(gμν), Palatini formulation is an independent variable. As main result, we show that, regardless underlying theory gravity, field-space curvature Einstein frame has no influence on...
In this paper we study the observational constraints that can be imposed on coupling parameter $\stackrel{^}{\ensuremath{\alpha}}$ of regularized version four-dimensional Einstein-Gauss-Bonnet theory gravity. We use scalar-tensor field equations to perform a thorough investigation its slow-motion and weak-field limit apply our results observations wide array physical systems admit such description. find Laser Geometric Environmental Observation Survey satellites are most constraining,...
Context. The Euclid space satellite mission will measure the large-scale clustering of galaxies at an unprecedented precision, providing a unique probe modifications to ΛCDM model. Aims. We investigated approximations needed efficiently predict matter and dark halos in context modified gravity exotic energy scenarios. examined normal branch Dvali–Gabadadze–Porrati model, Hu–Sawicki f ( R ) slowly evolving interacting massive neutrinos. For each, we tested for perturbative kernel...
In this work we study static black holes in the regularized 4D Einstein-Gauss-Bonnet theory of gravity; a shift-symmetric scalar-tensor that belongs to Horndeski class. This features simple hole solution can be written closed form, and which show is unique static, spherically-symmetric asymptotically-flat vacuum theory. We further no asymptotically-flat, time-dependent, perturbations geometry are allowed, suggests it may only admits (a result analogous Birkhoff's theorem). Finally, consider...
Interacting dark energy models have been suggested as alternatives to the standard cosmological model, $\Lambda$CDM. We focus on a phenomenologically interesting class of scattering that is characterised by pure momentum exchange between and matter. This model extends parameter space with respect $\Lambda$CDM two parameters, $w$ $A$, which define equation state strength coupling matter, respectively. In order test non-standard cosmologies Stage-IV galaxy clustering surveys, it crucial mildly...
Dark Scattering (DS) is an interacting dark energy model characterised by pure momentum exchange between and matter. It phenomenologically interesting because it unconstrained CMB data can alleviate the $S_8$ tension. We derive constraints on cosmological DS parameters using three two-point correlation functions (3$\times$2pt) from Energy Survey third year release (DES Y3). then add information multipoles of galaxy power spectrum combined with Baryonic Acoustic Oscillation (BAO) measurements...
Recent results from the Dark Energy Spectroscopic Instrument find a preference for dynamical dark energy. This motivates improving accuracy of predictions energy models, including those which can resolve current tensions in data, such as scattering model. We improve parameterized post-Friedmann approach this model, reducing error approximately 1.3% to only 0.1%. Additionally, we show that commonly used scale-independent approximation may not be completely accurate and, when applying best-fit...
We present baryon acoustic oscillation (BAO) measurements from more than 14 million galaxies and quasars drawn the Dark Energy Spectroscopic Instrument (DESI) Data Release 2 (DR2), based on three years of operation. For cosmology inference, these galaxy are combined with DESI Lyman-$\alpha$ forest BAO results presented in a companion paper. The DR2 consistent DR1 SDSS, their distance-redshift relationship matches those recent compilations supernovae (SNe) over same redshift range. well...
We present the Baryon Acoustic Oscillation (BAO) measurements with Lyman-alpha (LyA) forest from second data release (DR2) of Dark Energy Spectroscopic Instrument (DESI) survey. Our BAO include both auto-correlation LyA absorption observed in spectra high-redshift quasars and cross-correlation quasar positions. The total sample size is approximately a factor two larger than DR1 dataset, over 820,000 positions 1.2 million quasars. describe several significant improvements to our analysis this...
Understanding nonlinear structure formation is crucial for fully exploring the data generated by stage IV surveys, requiring accurate modelling of power spectrum. This challenging deviations from $\Lambda$CDM, but we must ensure that alternatives are well tested, to avoid false detections. We present an extension halo model reaction framework interacting dark energy. modify including additional force in Dark Scattering and implement it into ReACT. The combined with a pseudo spectrum...
Abstract We constrain the growth index γ by performing a full-shape analysis of power spectrum multipoles measured from BOSS DR12 data. adopt theoretical model based on Effective Field theory Large Scale Structure (EFTofLSS) and focus two different cosmologies: CDM γν CDM, where we also vary total neutrino mass. explore choices for priors primordial amplitude A s spectral n , finding that informative are necessary to alleviate degeneracies between parameters avoid strong projection effects...
ABSTRACT We present constraints on the dark scattering model through cosmic shear measurements from Kilo Degree Survey (KiDS-1000), using an accelerated pipeline with novel emulators produced CosmoPower. Our main emulator, for non-linear matter power spectrum, is trained predictions halo reaction framework, previously validated against simulations. Additionally, we include effects of baryonic feedback HMCode2016, whose contribution also emulated. analyse complete set statistics KiDS-1000,...
In this paper, we study the effects of an interaction between dark matter and energy through a two scalar field model with potential $V(\phi,\chi)=e^{-\lambda\phi}P(\phi,\chi)$, where $P(\phi,\chi)$ is polynomial. We show that cosmic expansion dynamics Universe reproduced for large range bare mass there exist solutions transient accelerated expansion. A modification in exponential behavior studied, important physical implications, including possibility more realistic acceleration solutions.
Abstract We forecast constraints on minimal model-independent parametrisations of several Modified Gravity theories using mock Stage-IV cosmic shear data. include nonlinear effects and screening, which ensures recovery General Relativity small scales. introduce a power spectrum emulator to accelerate our analysis evaluate the robustness growth index parametrisation with respect two cosmologies: ΛCDM normal branch DGP model. uncertainties γ be order ∼ 10%. find that halo-model based screening...