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Accurate Baryon Acoustic Oscillations reconstruction via semi-discrete optimal transport by von Hausegger, Sebastian; Lévy, Bruno; Mohayaee, Roya is a scholarly article available to read on EtoBox.

What is Accurate Baryon Acoustic Oscillations reconstruction via semi-discrete optimal transport about?

Optimal transport theory has recently reemerged as a vastly resourceful field of mathematics with elegant applications across physics and computer science. Harnessing methods from geometry processing, we report on the efficient implementation for a specific problem in cosmology -- the reconstruction of the linear density field from low redshifts, in particular the recovery of the Baryonic Acoustic Oscillation (BAO) scale. We demonstrate our algorithm's accuracy by retrieving the BAO scale in noise-less cosmological simulations that are dedicated to cancel cosmic variance; we find uncertainties to be reduced by a factor of 4.3 compared with performing no reconstruction, and a factor of 3.1 compared with standard reconstruction.

Author

von Hausegger, Sebastian; Lévy, Bruno; Mohayaee, Roya

Published

2021

Language

EN