Year: 2019
Type: article
Abstract: Observational cosmology in the next decade will rely on probes of the distribution of matter in the redshift range between 0<z<3 to elucidate the nature of dark matter and dark energy. In this redshift range, galaxy formation is known to have a significant impact on observables such as two-point correlations of galaxy shapes and positions, altering their amplitude and scale dependence beyond the expected statistical uncertainty of upcoming experiments at separations under 10 Mpc. Successful extraction of information in such a regime thus requires, at the very least, unbiased models for the impact of galaxy formation on the matter distribution, and can benefit from complementary observational priors. This work reviews the current state of the art in the modelling of baryons for cosmology, from numerical methods to approximate analytical prescriptions, and makes recommendations for studies in the next decade, including a discussion of potential probe combinations that can help constrain the role of baryons in cosmological studies. We focus, in particular, on the modelling of the matter power spectrum, P(k,z), as a function of scale and redshift, and of the observables derived from this quantity. This work is the result of a workshop held at the University of Oxford in November of 2018.
Source: The Open Journal of Astrophysics
Authors: Nora Elisa Chisari, Alexander J. Mead, Shahab Joudaki, Pedro G. Ferreira, Aurel Schneider, Joseph Mohr, Tilman Tröster, David Alonso, Ian G. McCarthy, Sergio Martin-Alvarez, Julien Devriendt, Adrianne Slyz, Marcel P. van Daalen
Institutions: University of Oxford, University of British Columbia, Institut de Ciències del Cosmos, Universitat de Barcelona, ETH Zurich, Institute for Particle Physics and Astrophysics, Royal Observatory, University of Edinburgh, Liverpool John Moores University, Leiden University, Leiden Observatory
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Funders: National Science Foundation, Hintze Family Charitable Foundation, Royal Astronomical Society, University of Oxford, European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Economic and Social Research Council, Science and Technology Facilities Council
Awards: G1197311398, G2924387223, G36807050, G434337789, G4369834866, G4430097687, G4552791771, Cosmological joint-probe analyses: constraining the effect of baryon physics on the matter distribution, G6110335720, Using the halo model to maximise the information gain from forthcoming weak-lensing surveys., Exploring the Dark Matter Sector with Astronomical Surveys, G8345931481
OpenAlex ID: W2953580170