2024
DOI: 10.1088/1475-7516/2024/06/045
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Fast and spurious: a robust determination of our peculiar velocity with future galaxy surveys

Fabien Lacasa,
Camille Bonvin,
Charles Dalang
et al.

Abstract: To date, the most precise measurement of the observer's peculiar velocity comes from the dipole in the Cosmic Microwave Background (CMB). This velocity also generates a dipole in the source number counts, whose amplitude is governed not only by the observer velocity, but also by specific properties of the sources, that are difficult to determine precisely. Quantitative studies of the source number counts currently give dipoles which are reasonably well aligned with the CMB dipole, but with a significantly larg… Show more

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