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Título del libro: 14th Marcel Grossman Meeting On Recent Developments In Theoretical And Experimental General Relativity, Astrophysics And Relativistic Field Theories, Proceedings
Título del capítulo: On the use of redshift as a time parameter in the FLRW metric

Autores UNAM:
LUIS SALAS CASALES;
Autores externos:

Idioma:
Inglés
Año de publicación:
2018
Palabras clave:

Astrophysics; Cosmology; Red shift; Spatial scaling; Time parameter; Time-scaling; Relativity


Resumen:

I comment on the different choices of time parameter that are employed to calculate proper co-moving distance in the FLWR metric. I argue that redshift is used by more authors in recent years due to a series of advantages from the observational point of view. I therefore present a geometric redshift distortion test, that has recently been used as a probe for cosmology, in the same terms and note the simplicity and symmetry of the expression. I also present the FLRW metric in terms of the redshift and the Hubble function, and show how the later replaces the spatial scaling function by time scaling. Copyright © 2018 by the Editors.All rights reserved.


Entidades citadas de la UNAM: