Physics
Scientific paper
Oct 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998gregr..30.1445g&link_type=abstract
General Relativity and Gravitation, Volume 30, Issue 10, pp.1445-1459
Physics
1
Isotropic Radial Coordinate
Scientific paper
In a Schwarzschild field, the use of an isotropic radial coordinate r produces a doublevalued description of space in that at a given time two values of r correspond to the same spatial point. We show that a similar doublevaluedness is present in a bound or unbound Friedmann-Robertson-Walker universe when it is described with an isotropic radial coordinate. This has important implications in cosmology when isotropic coordinates are used for describing distant galaxies in bound and unbound universe models.
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