Observational search for primordial chirality violations using galaxy angular momenta

Abstract

We search for evidence of primordial chirality violation in the galaxy data from the Sloan Digital Sky Survey by comparing how strongly directions of galaxy angular momenta correlate with left and right helical components of a spin vector field constructed from the initial density perturbations. Within uncertainties, galaxy spins correlate with these two helical components identically, which is consistent with Universe without primordial chirality violation. Given current data, it is not yet possible to rule out maximal chiral violation, although the case of vanishing correlation with the right helical component is ruled out at about 3.8$\sigma$.

6 pages, accepted version

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Cited by in corpus (10)

• Colliding Ghosts: Constraining Inflation with the Parity-Odd Galaxy Four-Point Function
• Integrated perturbation theory for cosmological tensor fields. III. Projection effects
• Analysis of $\sim 10^6$ spiral galaxies from four telescopes shows large-scale patterns of asymmetry in galaxy spin directions
• Baryonic Effects on Lagrangian Clustering and Angular Momentum Reconstruction
• Extracting parity-violating gravitational waves from projected tidal force tensor in three dimensions
• Probing vector chirality in the early Universe
• Spin speed correlations and the evolution of galaxy-halo systems
• Galaxy Spin Classification I: Z-wise vs S-wise Spirals With Chirality Equivariant Residual Network
• Measuring cosmic filament spin with the kinetic Sunyaev-Zel'dovich effect
• Parity Violation in Galaxy Shapes: Primordial Non-Gaussianity