
Accession Number : AD0674751
Title : COSMOLOGY WITH INVARIANT COMMUNICATION TIMES.
Descriptive Note : Research communication no. 64,
Corporate Author : DOUGLAS AIRCRAFT CO INC HUNTINGTON BEACH CALIF ADVANCED RESEARCH LABS
Personal Author(s) : Edelen,Dominic G. B.
Report Date : JUN 1968
Pagination or Media Count : 23
Abstract : If t represents the usual cosmic time parameter, with t sub o being the present epoch, a 'tautime' is defined by the relation d tau = R(t sub o)dt/R(t) where R(t) is the radius of the universe at time t. Assuming that the results of special relativity hold at each epoch with respect to tautime, it is shown that any two comoving bodies that can be connected by light signals have an invariant communication time with respect to tautime, and the velocity of light is given by C(t) = c/(d tau(t)/dt). Even though this result necessitates certain basic changes, it is shown that the same relations hold among distance, red shift, luminosity, and the Hubble parameter as obtained in classical cosmology, and that observations at the present epoch do not differentiate between tautime and ttime. Basically, the results show that tautime is a natural dynamical time for cosmological investigations and its use rearranges the line element in such a way that the timewise pathology occurs only through a conformal factor.
Descriptors : (*ASTROPHYSICS, *RELATIVITY THEORY), INVARIANCE, TIME, BRIGHTNESS, LINE SPECTRA, VISUAL SIGNALS, MATHEMATICAL MODELS
Subject Categories : Astrophysics
Quantum Theory and Relativity
Distribution Statement : APPROVED FOR PUBLIC RELEASE