The apparent size of distant objects
type: Item
instance of: scholarly article
title: The apparent size of distant objects
zbMATH Open document ID: 0614.53068
DOI: 10.1007/BF00760656
author: Wolfgang Hasse
published in: General Relativity and Gravitation
publication date: 1987-01-01T00:00:00Z
review text: A formula in terms of the exponential map is derived, which reveals for any observer in an arbitrary pseudo-Riemannian space-time the apparent diameter (i.e., the angular diameter) of any distant object. The formula shows immediately the existence of the effect of apparent distortion of the objects. It is proved that this distortion is absent if and only if the space-time is conformally flat.
Mathematics Subject Classification ID: 53C80
Mathematics Subject Classification ID: 53C50
Mathematics Subject Classification ID: 83C99
zbMATH DE Number: 3994496
zbMATH Keywords: pseudo-Riemannian space-time
zbMATH Keywords: apparent diameter
zbMATH Keywords: distant object
zbMATH Keywords: distortion
MaRDI profile type: Publication
cites work: Q4067705
description: scientific article; zbMATH DE number 3994496