Probing dipolar power asymmetry with galaxy clustering and intrinsic alignments

Abstract

We investigate the prospects for probing large-scale statistical anisotropy through galaxy clustering and intrinsic alignments (IA) in Stage IV galaxy surveys. Specifically, we consider a dipolar modulation in the primordial power spectrum and evaluate the Fisher information matrix using the two-point statistics of both the galaxy clustering and IA. Our analysis reveals that while IA alone provides limited improvement in constraining the anisotropy amplitude, the cross-spectrum between galaxy density and IA can contribute up to half the constraining power of galaxy clustering, especially for surveys with low galaxy bias and high number density of galaxies, such as Euclid. This demonstrates the potential of IA-clustering cross-correlations as a robust consistency check against systematics, and highlights the complementary roles of galaxy clustering and IA in constraining cosmic statistical anisotropy. We also show that marginalizing over galaxy bias and IA bias parameters has a negligible impact on the final constraint on the anisotropy amplitude.

arXiv comment16 pages, 8 figures, 1 table

References in corpus (51)

• Asymmetries in the CMB anisotropy field
• The significance of the largest scale CMB fluctuations in WMAP
• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• Planck 2013 results. XXIII. Isotropy and statistics of the CMB
• Euclid. I. Overview of the Euclid mission
• The axis of evil
• Planck 2018 results. VII. Isotropy and Statistics of the CMB
• Intrinsic and Extrinsic Galaxy Alignment
• Planck 2015 results. XVI. Isotropy and statistics of the CMB
• Intrinsic galaxy alignments from the 2SLAQ and SDSS surveys: luminosity and redshift scalings and implications for weak lensing surveys
• Weak lensing surveys and the intrinsic correlation of galaxy ellipticities
• Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Dark Energy Induced Correlation with Radio Sources
• Simultaneous measurement of cosmology and intrinsic alignments using joint cosmic shear and galaxy number density correlations
• A Hemispherical Power Asymmetry from Inflation
• 2-Point Correlations in the COBE DMR 4-Year Anisotropy Maps
• Asymmetries in the local curvature of the WMAP data
• Tidal alignment of galaxies
• Revisiting the NVSS number count dipole
• Constraints on cosmic hemispherical power anomalies from quasars
• A Scale-Dependent Power Asymmetry from Isocurvature Perturbations
• Cosmological Information in the Intrinsic Alignments of Luminous Red Galaxies
• Homogeneity and isotropy in the 2MASS Photometric Redshift catalogue
• Broken Isotropy from a Linear Modulation of the Primordial Perturbations
• Systematic Effects on Determination of the Growth Factor from Redshift-space Distortions
• The CMB asymmetry from inflation
• CMB Power Asymmetry from Non-Gaussian Modulation
• Multitracing Anisotropic Non-Gaussianity with Galaxy Shapes
• Detecting higher spin fields through statistical anisotropy in the CMB and galaxy power spectra
• Microwave Background Correlations from Dipole Anisotropy Modulation
• Improving geometric and dynamical constraints on cosmology with intrinsic alignments of galaxies
• Dipolar modulation in number counts of WISE-2MASS sources
• Power spectrum of halo intrinsic alignments in simulations
• Testing Isotropy in the Local Universe
• Anisotropies of galaxy ellipticity correlations in real and redshift space: angular dependence in linear tidal alignment model
• A viable explanation of the CMB dipolar statistical anisotropy
• Limits on statistical anisotropy from BOSS DR12 galaxies using bipolar spherical harmonics
• Tightening geometric and dynamical constraints on dark energy and gravity: galaxy clustering, intrinsic alignment and kinetic Sunyaev-Zel'dovich effect
• Imprint of anisotropic primordial non-Gaussianity on halo intrinsic alignments in simulations
• Polypolar spherical harmonic decomposition of galaxy correlators in redshift space: Toward testing cosmic rotational symmetry
• Intrinsic alignment statistics of density and velocity fields at large scales: Formulation, modeling, and baryon acoustic oscillation features
• Cosmological simulation in tides: power spectra and halo shape responses, and shape assembly bias
• Is there evidence for anomalous dipole anisotropy in the large-scale structure?
• Testing tidal alignment models for anisotropic correlations of halo ellipticities with N-body simulations
• Anisotropic separate universe simulations
• Hemispherical Anomaly from Asymmetric Initial States
• Strongly scale-dependent CMB dipolar asymmetry from super-curvature fluctuations
• Super-sample tidal modes on the celestial sphere
• Intrinsic Alignment as an RSD Contaminant in the DESI Survey
• Statistical anisotropy in galaxy ellipticity correlations
• Minimum variance estimation of statistical anisotropy via galaxy survey