Cosmological Probes of Structure Growth and Tests of Gravity

Author:

Hou Jiamin12ORCID,Bautista Julian3,Berti Maria456ORCID,Cuesta-Lazaro Carolina789,Hernández-Aguayo César1011ORCID,Tröster Tilman12ORCID,Zheng Jinglan13

Affiliation:

1. Department of Astronomy, University of Florida, Gainesville, FL 32611, USA

2. Max–Planck–Institut für Extraterrestische Physik, Postfach 1312, Giessenbachstr., D-85748 Garching, Germany

3. Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France

4. SISSA—International School for Advanced Studies, Via Bonomea 265, 34136 Trieste, Italy

5. INFN—National Institute for Nuclear Physics, Via Valerio 2, 34127 Trieste, Italy

6. IFPU—Institute for Fundamental Physics of the Universe, Via Beirut 2, 34151 Trieste, Italy

7. Center for Astrophysics, Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA

8. The NSF AI Institute for Artificial Intelligence and Fundamental Interactions, 77 Massachusetts Avenue, Cambridge, MA 02139, USA

9. Department of Physics, Massachusetts Institute of Technology, Cambridge, MA 02139, USA

10. Max–Planck–Institut für Astrophysik, Karl-Schwarzschild-Str. 1, D-85748 Garching, Germany

11. Excellence Cluster ORIGINS, Boltzmannstrasse 2, D-85748 Garching, Germany

12. Institute for Particle Physics and Astrophysics, ETH Zürich, Wolfgang-Pauli-Strasse 27, 8093 Zürich, Switzerland

13. Fakultät für Physik, Universität Bielefeld, Postfach 100131, D-33501 Bielefeld, Germany

Abstract

The current standard cosmological model is constructed within the framework of general relativity with a cosmological constant Λ, which is often associated with dark energy, and phenomenologically explains the accelerated cosmic expansion. Understanding the nature of dark energy is one of the most appealing questions in achieving a self-consistent physical model at cosmological scales. Modification of general relativity could potentially provide a more natural and physical solution to the accelerated expansion. The growth of the cosmic structure is sensitive in constraining gravity models. In this paper, we aim to provide a concise introductory review of modified gravity models from an observational point of view. We will discuss various mainstream cosmological observables, and their potential advantages and limitations as probes of gravity models.

Funder

European Union’s Horizon 2020 research and innovation program

Excellence Cluster ORIGINS

Swiss National Science Foundation

Excellence Initiative of Aix-Marseille University

Ministry of Culture and Science of the State of North Rhine-Westphalia

INFN INDARK PD51

Publisher

MDPI AG

Subject

General Physics and Astronomy

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