On the use of scaling relations for the Tolman test

摘要

The use of relations between structural parameters of early-type galaxies to perform the Tolman test for the expansion of the universe is reconsidered. Scaling relations such as the fundamental plane or the Kormendy relation require the transformation from angular to metric sizes, to compare the relation at different z-values. This transformation depends on the assumed word model: galaxies of a given angular size, at a given z, are Larger(in units of kiloparsecs) in a nonexpanding universe than in an expanding one.