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 test the regime of validity of the effective field theory (EFT) ofintrinsic alignments (IA) at the one-loop level by comparing with 3D halo shapestatistics in N-body simulations. This model is based on the effective fieldtheory of large-scale structure (EFT of LSS) and thus a theoreticallywell-motivated extension of the familiar non-linear alignment (NLA) model andthe tidal-alignment-tidal-torquing (TATT) model. It contains a total of $8$free bias parameters. Specifically, we measure the dark matter halo shape-shapemultipoles $P_{EE}^{(0)}(k), P_{EE}^{(2)}(k), P_{BB}^{(0)}(k), P_{BB}^{(2)}(k)$as well as the matter-shape multipoles $P_{\delta E}^{(0)}(k), P_{\deltaE}^{(2)}(k)$ from the simulations and perform a joint fit to determine thelargest wavenumber $k_{\text{max}}$ up to which the theory predictions from theEFT of IA are consistent with the measurements. We find that the EFT of IA isable to describe intrinsic alignments of dark matter halos up to$k_\text{max}=0.30\,h/\text{Mpc}$ at $z=0$. This demonstrates a clearimprovement over other existing alignment models like NLA and TATT, which areonly accurate up to $k_\text{max}=0.05\,h/\text{Mpc}$ . We examine theposterior distributions of the higher-order bias parameters, and show thattheir inclusion is necessary to describe intrinsic alignments in thequasi-linear regime. Further, the EFT of IA is able to accurately describe theauto-spectrum of intrinsic alignment B-modes, in contrast to the otheralignment models considered.

Effective Field Theory of Intrinsic Alignments at One Loop Order: a Comparison to Dark Matter Simulations