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Title: Light-cone observables and gauge-invariance in the geodesic light-cone formalism

Abstract

The remarkable properties of the geodesic light-cone (GLC) coordinates allow analytic expressions for the light-cone observables, providing a new non-perturbative way for calculating the effects of inhomogeneities in our Universe. However, the gauge-invariance of these expressions in the GLC formalism has not been shown explicitly. Here we provide this missing part of the GLC formalism by proving the gauge-invariance of the GLC expressions for the light-cone observables, such as the observed redshift, the luminosity distance, and the physical area and volume of the observed sources. Our study provides a new insight on the properties of the GLC coordinates and it complements the previous work by the GLC collaboration, leading to a comprehensive description of light propagation in the GLC representation.

Authors:
;  [1]
  1. Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zürich, Winterthurerstrasse 190, CH-8057, Zürich (Switzerland)
Publication Date:
OSTI Identifier:
22676179
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2017; Journal Issue: 06; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COMPUTERIZED SIMULATION; DISTANCE; GAUGE INVARIANCE; LIGHT CONE; LUMINOSITY; PERTURBATION THEORY; RED SHIFT; UNIVERSE

Citation Formats

Scaccabarozzi, Fulvio, and Yoo, Jaiyul, E-mail: fulvio@physik.uzh.ch, E-mail: jyoo@physik.uzh.ch. Light-cone observables and gauge-invariance in the geodesic light-cone formalism. United States: N. p., 2017. Web. doi:10.1088/1475-7516/2017/06/007.
Scaccabarozzi, Fulvio, & Yoo, Jaiyul, E-mail: fulvio@physik.uzh.ch, E-mail: jyoo@physik.uzh.ch. Light-cone observables and gauge-invariance in the geodesic light-cone formalism. United States. doi:10.1088/1475-7516/2017/06/007.
Scaccabarozzi, Fulvio, and Yoo, Jaiyul, E-mail: fulvio@physik.uzh.ch, E-mail: jyoo@physik.uzh.ch. Thu . "Light-cone observables and gauge-invariance in the geodesic light-cone formalism". United States. doi:10.1088/1475-7516/2017/06/007.
@article{osti_22676179,
title = {Light-cone observables and gauge-invariance in the geodesic light-cone formalism},
author = {Scaccabarozzi, Fulvio and Yoo, Jaiyul, E-mail: fulvio@physik.uzh.ch, E-mail: jyoo@physik.uzh.ch},
abstractNote = {The remarkable properties of the geodesic light-cone (GLC) coordinates allow analytic expressions for the light-cone observables, providing a new non-perturbative way for calculating the effects of inhomogeneities in our Universe. However, the gauge-invariance of these expressions in the GLC formalism has not been shown explicitly. Here we provide this missing part of the GLC formalism by proving the gauge-invariance of the GLC expressions for the light-cone observables, such as the observed redshift, the luminosity distance, and the physical area and volume of the observed sources. Our study provides a new insight on the properties of the GLC coordinates and it complements the previous work by the GLC collaboration, leading to a comprehensive description of light propagation in the GLC representation.},
doi = {10.1088/1475-7516/2017/06/007},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 06,
volume = 2017,
place = {United States},
year = {Thu Jun 01 00:00:00 EDT 2017},
month = {Thu Jun 01 00:00:00 EDT 2017}
}