New flowchart to eliminate universe models
Cosmologists have many possible models for the universe, of which only one can be true. A new A new flowchart detailed in Physical Review D on November 7 will eliminate some of them when two specific universe features are accurately measured.
Cosmologists try to understand how the entire universe formed and evolves. In short, cosmology is the science of everything above the scale of our pale blue dot floating around in the vastness of space. By aiming their telescopes at distant galaxies and the afterglow of the Big Bang, cosmologists look back in time and pick up pieces of the puzzle. They used these pieces as parameters in the many possible models they have created for the universe. The more precisely parameters are measured, the more models can be excluded.
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In a flowchart, Alessandra Silvestri and Levon Pogosian answer questions with ‘yes’ and ‘no’, leading to the subsequent conclusion. For example, if μ is greater than one and Σ is less, then a large collection of models is ruled out; the so-called Horndeski class. Credit: Leiden Institute of Physics
