The Velocity Field Olympics: assessing velocity field reconstructions with direct distance tracers
Richard Stiskalek; Harry Desmond; Julien Devriendt; Adrianne D. Slyz; Guilhem Lavaux; Michael James Hudson; Deaglan J. Bartlett; Hélène M. Courtois · 2025 · Monthly Notices of the Royal Astronomical Society
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Abstract
ABSTRACT The peculiar velocity field of the local Universe provides direct insights into its matter distribution and the underlying theory of gravity, and is essential in cosmological analyses for modelling deviations from the Hubble flow. Numerous methods have been developed to reconstruct the density and velocity fields at $z \lesssim 0.05$, typically constrained by redshift-space galaxy positions or by direct distance tracers such as the Tully–Fisher relation, the Fundamental Plane, or Type Ia supernovae. We introduce a validation framework to evaluate the accuracy of these reconstructions
Abstract by Richard Stiskalek; Harry Desmond; Julien Devriendt; Adrianne D. Slyz; Guilhem Lavaux; Michael James Hudson; Deaglan J. Bartlett; Hélène M. Courtois, Monthly Notices of the Royal Astronomical Society (2025) — licensed CC BY 4.0.
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Metadata source: OpenAlex · DOI 10.1093/mnras/staf1960