Professor Pedro Ferreira: Publications

$\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects

(1993)

Authors:

David Coulson, Pedro Ferreira, Paul Graham, Neil Turok

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Inflation and squeezed quantum states

(1993)

Authors:

Andreas Albrecht, Pedro Ferreira, Michael Joyce, Tomislav Prokopec

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Euclid preparation: VI. Verifying the Performance of Cosmic Shear Experiments

Authors:

Euclid Collaboration, P Paykari, Td Kitching, H Hoekstra, R Azzollini, Vf Cardone, M Cropper, Caj Duncan, A Kannawadi, L Miller, H Aussel, If Conti, N Auricchio, M Baldi, S Bardelli, A Biviano, D Bonino, E Borsato, E Bozzo, E Branchini, S Brau-Nogue, M Brescia, J Brinchmann, C Burigana, S Camera, V Capobianco, C Carbone, J Carretero, Fj Castander, M Castellano, S Cavuoti, Y Charles, R Cledassou, C Colodro-Conde, G Congedo, C Conselice, L Conversi, Y Copin, J Coupon, Hm Courtois, A Da Silva, X Dupac, G Fabbian, S Farrens, Pg Ferreira, P Fosalba, N Fourmanoit, M Frailis, M Fumana, S Galeotta

Abstract:

Our aim is to quantify the impact of systematic effects on the inference of cosmological parameters from cosmic shear. We present an end-to-end approach that introduces sources of bias in a modelled weak lensing survey on a galaxy-by-galaxy level. Residual biases are propagated through a pipeline from galaxy properties (one end) through to cosmic shear power spectra and cosmological parameter estimates (the other end), to quantify how imperfect knowledge of the pipeline changes the maximum likelihood values of dark energy parameters. We quantify the impact of an imperfect correction for charge transfer inefficiency (CTI) and modelling uncertainties of the point spread function (PSF) for Euclid, and find that the biases introduced can be corrected to acceptable levels.

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Modelling baryonic feedback for survey cosmology

Open Journal of Astrophysics

Authors:

Nora Elisa Chisari, Alexander J Mead, Shahab Joudaki, Pedro Ferreira, Aurel Schneider, Joseph Mohr, Tilman Tröster, David Alonso, Ian G McCarthy, Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz, Marcel P van Daalen

Abstract:

Observational cosmology in the next decade will rely on probes of the distribution of matter in the redshift range between $0

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Reconstructing the gravitational field of the local universe

Monthly Notices of the Royal Astronomical Society Blackwell Publishing Inc.

Authors:

H Desmond, PG Ferreira, G Lavaux, J Jasche

Abstract:

Tests of gravity at the galaxy scale are in their infancy. As a first step to systematically uncovering the gravitational significance of galaxies, we map three fundamental gravitational variables -- the Newtonian potential, acceleration and curvature -- over the galaxy environments of the local universe to a distance of approximately 200 Mpc. Our method combines the contributions from galaxies in an all-sky redshift survey, halos from an N-body simulation hosting low-luminosity objects, and linear and quasi-linear modes of the density field. We use the ranges of these variables to determine the extent to which galaxies expand the scope of generic tests of gravity and are capable of constraining specific classes of model for which they have special significance. Finally, we investigate the improvements afforded by upcoming galaxy surveys.

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Professor Pedro Ferreira

Research theme

Sub department

$\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects

Authors:

Inflation and squeezed quantum states

Authors:

Euclid preparation: VI. Verifying the Performance of Cosmic Shear Experiments

Authors:

Abstract:

Modelling baryonic feedback for survey cosmology

Authors:

Abstract:

Reconstructing the gravitational field of the local universe

Authors:

Abstract:

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Professor Pedro Ferreira

Research theme

Sub department

Research groups

$\Pi$ in the Sky ? Microwave Anisotropies from Cosmic Defects

Authors:

Inflation and squeezed quantum states

Authors:

Euclid preparation: VI. Verifying the Performance of Cosmic Shear Experiments

Authors:

Abstract:

Modelling baryonic feedback for survey cosmology

Authors:

Abstract:

Reconstructing the gravitational field of the local universe

Authors:

Abstract: