Pith. sign in

REVIEW 2 cited by

Intrinsic Alignment as an RSD Contaminant in the DESI Survey

Not yet reviewed by Pith; the record is open.

Re-run · record.json Download PDF Read on arXiv ↗

This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.

SPECIMEN: schema-true, not a live event

T0 review · schema-true

One-sentence machine reading of the paper's core claim.

pith:XXXXXXXX · record.json · timestamp

arxiv 2209.03949 v3 pith:NZ7YMZ5J submitted 2022-09-08 astro-ph.CO

Claire Lamman , Daniel Eisenstein , Jessica Nicole Aguilar , David Brooks , Axel de la Macorra , Peter Doel , Andreu Font-Ribera , Satya Gontcho A Gontcho
show 12 more authors
Klaus Honscheid Robert Kehoe Theodore Kisner Anthony Kremin Martin Landriau Michael Levi Ramon Miquel John Moustakas Nathalie Palanque-Delabrouille Claire Poppett Michael Schubnell Gregory Tarlé
This is my paper · ORCID
classification astro-ph.CO
keywords alignmentdesisurveytidalintrinsiclrgsmeasurequadrupole
verification ladder T0 review T1 audit T2 compute T3 formal
0 comments
read the original abstract

We measure the tidal alignment of the major axes of Luminous Red Galaxies (LRGs) from the Legacy Imaging Survey and use it to infer the artificial redshift-space distortion signature that will arise from an orientation-dependent, surface-brightness selection in the Dark Energy Spectroscopic Instrument (DESI) survey. Using photometric redshifts to down-weight the shape-density correlations due to weak lensing, we measure the intrinsic tidal alignment of LRGs. Separately, we estimate the net polarization of LRG orientations from DESI's fiber-magnitude target selection to be of order 10^-2 along the line of sight. Using these measurements and a linear tidal model, we forecast a 0.5% fractional decrease on the quadrupole of the 2-point correlation function for projected separations of 40-80 Mpc/h. We also use a halo catalog from the Abacus Summit cosmological simulation suite to reproduce this false quadrupole.

Discussion (0). Continue with ORCID to comment.

Forward citations

Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Where Galaxies Point: First Measurement of the Large-Scale Axial Intrinsic Alignment

    astro-ph.CO 2025-11 reject novelty 7.0 of 10

    DES galaxy position angles show a coherent preferred axis (RA≈300°, Dec≈50°) — elliptical major and spiral minor axes aligned along it — reported as the first detection of horizon-scale axial intrinsic alignment.

  2. Anisotropic Secondary Bias of Dark Matter Haloes in a $\Lambda$CDM Universe

    astro-ph.CO 2026-07 conditional novelty 6.0 of 10

    Halo spin and elongation create a direction-dependent clustering signal that is governed by alignment with the surrounding cosmic web, whereas orientation-averaged secondary bias is governed by tidal anisotropy.

Pith tools