Light-cone averaging in cosmology: formalism and applications

By M. Gasperini, G. Marozzi, F. Nugier, G. Veneziano. 2011

142 citations recorded by the source corpus.

We present a general gauge invariant formalism for defining cosmological averages that are relevant for observations based on light-like signals. Such averages involve either null hypersurfaces corresponding to a family of past light-cones or compact surfaces given by their intersection with timelike hypersurfaces. Generalized Buchert-Ehlers commutation rules for derivatives of these light-cone averages are given. After introducing some adapted "geodesic light-cone" coordinates, we give explicit expressions for averaging the redshift to luminosity-distance relation and the so-called "redshift drift" in a generic inhomogeneous Universe.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/89aaaf0e3e4932c515d2b94ab8822850ebc16bcb

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

1. T. Buchert
2. S. Rasanen
3. K. Enqvist
4. Teppo Mattsson

In Nuclear and High Energy Physics

1. S. Rasanen
2. T. Buchert
3. K. Enqvist
4. Teppo Mattsson

Citations in the corpus

• Backreaction in Late-Time Cosmology (2011, background): “A covariant formalism for averaging on different slices of the past light cone was recently introduced [108].”