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- W2034893287 abstract "The role of trigonometric parallaxes in cosmology is discussed. A differential relation between luminosity distance and trigonometric parallax distance is given. The relation is used to calculate the trigonometric parallax distance in Friedmann-Robertson-Walker universes. The resulting expression corrects and simplifies that obtained by Weinberg. It is shown that trigonometric parallaxes give important information about the space-time geometry which makes it possible to determine number densities of conserved classes of objects in the universe (e.g., galaxies) even if no dynamical model for the universe is assumed. On this basis it is argued that measurements of trigonometric parallaxes of objects at cosmological distances offer an opportunity to put cosmology on a more solid observational foundation. 22 references." @default.
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- W2034893287 date "1988-08-01" @default.
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- W2034893287 title "Trigonometric parallaxes of distant objects - What they could tell about the universe" @default.
- W2034893287 doi "https://doi.org/10.1086/166588" @default.
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