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Observed angles and geodesic light-cone coordinates


Mitsou, Ermis; Scaccabarozzi, Fulvio; Fanizza, Giuseppe (2018). Observed angles and geodesic light-cone coordinates. Classical and Quantum Gravity, 35(10):107002.

Abstract

We discuss the interpretation of the angles in the geodesic light-cone (GLC) coordinates. In particular, we clarify the way in which these angles can be identified with the observed ones. We show that, although this identification is always possible in principle, one cannot implement it in the usual gauge-fixing way, i.e. through a set of conditions on the GLC metric. Rather, one needs to invoke a tetrad at the observer and a Cartesian-like coordinate system in order to obtain the desired map globally on the observed sky.

Abstract

We discuss the interpretation of the angles in the geodesic light-cone (GLC) coordinates. In particular, we clarify the way in which these angles can be identified with the observed ones. We show that, although this identification is always possible in principle, one cannot implement it in the usual gauge-fixing way, i.e. through a set of conditions on the GLC metric. Rather, one needs to invoke a tetrad at the observer and a Cartesian-like coordinate system in order to obtain the desired map globally on the observed sky.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Language:English
Date:4 April 2018
Deposited On:07 Mar 2019 14:20
Last Modified:17 Sep 2019 20:13
Publisher:IOP Publishing
ISSN:0264-9381
OA Status:Green
Publisher DOI:https://doi.org/10.1088/1361-6382/aab06b

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