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Título del libro: Proceedings Of The 53rd Rencontres De Moriond On Cosmology 2018
Título del capítulo: Constrain modifed gravity models using 2-point marked correlation funcion on galaxy survey

Autores UNAM:
SEBASTIEN MICKAEL MARC FROMENTEAU; MARIANA VARGAS MAGAÑA;
Autores externos:

Idioma:

Año de publicación:
2020
Palabras clave:

Relativity; Correlation function; Expansion of the universe; General Relativity; Gravity model; Local density; Local environments; Screening mechanism; Small scale; Galaxies


Resumen:

While the study of modified gravity models in order to explain the acceleration of the expansion of the Universe is more intense, we need to propose more observations in order to help on distinguishing between them. One possibility is to use the well developed 2-point correlation function of galaxies applying a specific weight which depends on the local environment. However, a modified gravity model have to guaranty that standard General Relativity (Hereafter GR) is recovered at large enough density contrast (i.e small scales) considering the agreement of this well tested theory at local scale. The way to recover GR is generally using a screening mechanism which can be for example Chamaleon or Vainstein mechanisms. Anyway, it means that the clustering of galaxies have to depend on the local density around the galaxies and in a different way for various models. We will show the first steps on this study using simulations of f(R) models. © 2018 ARISF.


Entidades citadas de la UNAM: