What is it about?
In most models of the Universe, angular-diameter distance increases at first, then reaches a maximum, and subsequently decreases towards zero as we approach the Big Bang. The location of its maximum is strongly dependent on the model one uses. Thus, the recently measured value can help determine which model is preferred by the data.
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Why is it important?
We still don't have complete confidence in any one particular model of cosmology. This measurement can help to reduce the "clutter," by eliminating several possibilities.
Perspectives
The improved precision in cosmological measurements, including this particular determination of the maximum angular-diameter distance, helps to move us rapidly towards a final resolution of how the Universe has evolved since its inception.
Professor Fulvio Melia
University of Arizona
Read the Original
This page is a summary of: The maximum angular-diameter distance in cosmology, Monthly Notices of the Royal Astronomical Society, July 2018, Oxford University Press (OUP),
DOI: 10.1093/mnras/sty1962.
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