English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We develop a configuration-space picture of the relative velocity betweenbaryons and dark matter that clearly explains how it can shift the BAO scale inthe galaxy-galaxy correlation function. The shift occurs because the relativevelocity is non-zero only within the sound horizon and thus adds to thecorrelation function asymmetrically about the BAO peak. We further show that inconfiguration space the relative velocity has a localized, distinctivesignature in the three-point galaxy correlation function (3PCF). In particular,we find that a multipole decomposition is a favorable way to isolate therelative velocity in the 3PCF, and that there is a strong signature in the l=1multipole for triangles with 2 sides around the BAO scale. Finally, weinvestigate a further compression of the 3PCF to a function of only onetriangle side that preserves the localized nature of the relative velocitysignature while also nicely separating linear from non-linear bias. We expectthat this scheme will substantially lessen the computational burden of findingthe relative velocity in the 3PCF. The relative velocity's 3PCF signature canbe used to correct the shift induced in the galaxy-galaxy correlation functionso that no systematic error due to this effect is introduced into the BAO asused for precision cosmology.

On the signature of the baryon-dark matter relative velocity in the two and three-point galaxy correlation functions