Hubble diagram (IMAGE)

DOE/Lawrence Berkeley National Laboratory

Hubble diagram

Caption

DESI’s Hubble diagram plots a characteristic pattern – baryon acoustic oscillations, or BAO “bubbles” – at different ages of the universe. The amount of dark energy determines how fast the universe grows, and therefore the size of the bubbles. The solid line is how big Lambda CDM predicts the bubbles will be, while the dashed line shows the prediction from a different model where dark energy evolves with time. DESI will gather more data to determine which model is a better description of the universe.

Credit

Arnaud de Mattia/DESI collaboration

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