Model-independent measures of gravity at large scales

• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Pinho, Ana Marta [VerfasserIn]
• Verfasst von: Casas, Santiago [VerfasserIn]
• Titel: Model-independent measures of gravity at large scales
• Verf.angabe: Luca Amendola, Ana Marta Pinho and Santiago Casas
• E-Jahr: 2018
• Jahr: 13 November 2018
• Umfang: ? S.
• Fussnoten: Gesehen am 12.11.2020
• Titel Quelle: Enthalten in: International journal of modern physics / A
• Ort Quelle: Singapur : World Scientific Publ., 1986
• Jahr Quelle: 2018
• Band/Heft Quelle: 33(2018,31) Artikel-Nummer 1844022, ? Seiten
• ISSN Quelle: 1793-656X
• DOI: doi:10.1142/S0217751X18440220
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1584838027

Abstract

This paper aims at showing how to probe gravity in a model independent way using observable quantities which can be measured with the minimum number of assumptions.We find that it is possible to estimate the gravitational slip, defined as the ratio of the gravitational potentials, independently of assumptions concerning initial conditions, bias, and other cosmological parameters. Analyzing all the data currently available, we find η≈0.5±0.9 in the redshift range z=0.2-0.8 - Future datasets, like those provided by the Euclid satellite, will tighten this constraint by more than an order of magnitude.