Status: Bibliographieeintrag
Standort: ---
Exemplare:
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| Online-Ressource |
Verfasst von: | Frusciante, Noemi [VerfasserIn]  |
| Lima, Nelson A. [VerfasserIn]  |
Titel: | Cosmology of surviving Horndeski theory |
Titelzusatz: | The road ahead |
Verf.angabe: | Noemi Frusciante, Simone Peirone, Santiago Casas, and Nelson A. Lima |
E-Jahr: | 2019 |
Jahr: | 29 March 2019 |
Umfang: | 13 S. |
Illustrationen: | Illustrationen |
Fussnoten: | Gesehen am 22.05.2019 |
Titel Quelle: | Enthalten in: Physical review |
Ort Quelle: | Woodbury, NY : Inst., 2016 |
Jahr Quelle: | 2019 |
Band/Heft Quelle: | 99(2019,6) Artikel-Nummer 063538, Seite 1-13, 13 Seiten |
ISSN Quelle: | 2470-0029 |
Abstract: | In the context of the effective field theory of dark energy (EFT) we perform agnostic explorations of Horndeski gravity. We choose two parametrizations for the free EFT functions, namely, a power law and a dark energy density-like behavior on a nontrivial Chevallier-Polarski-Linder background. We restrict our analysis to those EFT functions which do not modify the speed of propagation of gravitational waves. Among those, we prove that one specific function cannot be constrained by data since its contribution to the observables is below the cosmic variance, although we show it has a relevant role in defining the viable parameter space. We place constraints on the parameters of these models by combining measurements from present-day cosmological data sets, and we prove that the next-generation galaxy surveys can improve such constraints by 1 order of magnitude. We then prove the validity of the quasistatic limit within the sound horizon of the dark field, by looking at the phenomenological functions mu and Sigma, associated, respectively, with clustering and lensing potentials. Furthermore, we notice up to 5% deviations in mu, Sigma with respect to general relativity at scales smaller than the Compton one. For the chosen parametrizations and in the quasistatic limit, future constraints on mu and Sigma can reach the 1% level and will allow us to discriminate between certain models at more than 3 sigma, provided the present best-fit values remain. |
DOI: | doi:10.1103/PhysRevD.99.063538 |
URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.1103/PhysRevD.99.063538 |
| DOI: https://doi.org/10.1103/PhysRevD.99.063538 |
Datenträger: | Online-Ressource |
Sprache: | eng |
Sach-SW: | acoustic-oscillations |
| constraints |
| dark energy |
| forecasts |
| modified gravity |
| power |
| space |
K10plus-PPN: | 1666082805 |
Verknüpfungen: | → Zeitschrift |
Cosmology of surviving Horndeski theory / Frusciante, Noemi [VerfasserIn]; 29 March 2019 (Online-Ressource)
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