Tolman surface brightness test

E145218

The Tolman surface brightness test is an observational cosmology method that checks whether the universe is expanding by examining how the surface brightness of distant galaxies diminishes with redshift.

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Statements (43)

Predicate Object
instanceOf cosmological test
observational cosmology method
affectedBy K-corrections
cosmological dimming
galaxy evolution
selection effects
appliedTo elliptical galaxies
galaxy clusters
assumes conservation of surface brightness in Euclidean static space
basedOn FLRW cosmological models
surface form: Friedmann–Lemaître–Robertson–Walker metric

relativistic cosmology
category cosmological observations
tests of the expanding universe
compares observed surface brightness–redshift relation with theoretical predictions
contrastsWith static universe models
developedBy Richard C. Tolman
distinguishes expanding universe from static tired-light models
field astrophysics
cosmology
hasConsequence observed dimming consistent with expansion rather than static space
involves angular diameter distance
luminosity distance
photon energy redshift
time dilation of photon arrival rates
measures change of surface brightness with redshift
namedAfter Richard C. Tolman
predicts (1+z)^-4 dependence of surface brightness in an expanding universe
proposedIn 1930s
purpose test whether the universe is expanding
relatedTo Etherington reciprocity theorem
Lemaître–Hubble law
surface form: Hubble–Lemaître law

Tolman test for the reality of the expansion of the universe
cosmic distance ladder
cosmic expansion
requires photometric measurements of galaxies
redshift measurements of galaxies
supports standard expanding universe interpretation of redshifts
tests cosmological models
reality of cosmic expansion
usedBy observational cosmologists
usedFor consistency checks of cosmological parameters
uses redshift of distant galaxies
surface brightness of galaxies

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Referenced by (2)

Full triples — surface form annotated when it differs from this entity's canonical label.

Richard C. Tolman notableConcept Tolman surface brightness test
Tolman knownFor Tolman surface brightness test
subject surface form: Richard C. Tolman
this entity surface form: Tolman surface brightness test in cosmology