First Constraints on Growth Rate from Redshift-Space Ellipticity Correlations of SDSS Galaxies at $0.16 &lt; z &lt; 0.70$

Okumura, Teppei; Taruya, Atsushi

doi:10.48550/arxiv.2301.06273

Cited by 1 publication

(3 citation statements)

References 35 publications

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“…Here, for simplicity, we only consider multipole moments = 0, 2, i.e. the monopole and quadrupole moments 18 .…”

Section: Simulation Datamentioning

confidence: 99%

“…(3.4) 18 In principle, it is possible to also include the hexadecapole P (4) EE , but it turns out that its signal-to-noise ratio is low compared to the lower multipoles.…”

Section: Covariance Modellingmentioning

confidence: 99%

“…If this is done within a well-motivated theoretical framework, it further allows for a physical interpretation of the intrinsic alignment constraints. Moreover, intrinsic alignments are emerging as a cosmological source of information, most recently through measurements of the growth rate in [18] and anisotropic primordial non-Gaussianity [19][20][21] from spectroscopic surveys. In the future, it is expected that alignments can also constrain the expansion of the Universe through baryon acoustic oscillations [22,23] and sensitivity to primordial gravitational waves and parity-violation scenarios [24,25].…”

Section: Introductionmentioning

confidence: 99%

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

Thomas¹,

Kurita²,

Chisari³

et al. 2023

Preprint

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We test the regime of validity of the effective field theory (EFT) of intrinsic alignments (IA) at the one-loop level by comparing with 3D halo shape statistics in N-body simulations. This model is based on the effective field theory of large-scale structure (EFT of LSS) and thus a theoretically well-motivated extension of the familiar non-linear alignment (NLA) model and the tidal-alignment-tidal-torquing (TATT) model. It contains a total of 8 free bias parameters. Specifically, we measure the dark matter halo shape-shape multipolesBB (k) as well as the matter-shape multipoles P (0) δE (k), P(2) δE (k) from the simulations and perform a joint fit to determine the largest wavenumber k max up to which the theory predictions from the EFT of IA are consistent with the measurements. We find that the EFT of IA is able to describe intrinsic alignments of dark matter halos up to k max = 0.30 h/Mpc at z = 0. This demonstrates a clear improvement over other existing alignment models like NLA and TATT, which are only accurate up to k max = 0.05 h/Mpc. We examine the posterior distributions of the higher-order bias parameters, and show that their inclusion is necessary to describe intrinsic alignments in the quasi-linear regime. Further, the EFT of IA is able to accurately describe the auto-spectrum of intrinsic alignment B-modes, in contrast to the other alignment models considered.

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“…Here, for simplicity, we only consider multipole moments = 0, 2, i.e. the monopole and quadrupole moments 18 .…”

Section: Simulation Datamentioning

confidence: 99%

“…(3.4) 18 In principle, it is possible to also include the hexadecapole P (4) EE , but it turns out that its signal-to-noise ratio is low compared to the lower multipoles.…”

Section: Covariance Modellingmentioning

confidence: 99%