Scale-Dependent Bias of Galaxies from Baryonic Acoustic Oscillations

Abstract

Baryonic acoustic oscillations (BAOs) modulate the density ratio of baryons to dark matter across large regions of the Universe. We show that the associated variation in the mass-to-light ratio of galaxies should generate an oscillatory, scale-dependent bias of galaxies relative to the underlying distribution of dark matter. A measurement of this effect would calibrate the dependence of the characteristic mass-to-light ratio of galaxies on the baryon mass fraction in their large scale environment. This bias, though, is unlikely to significantly affect measurements of BAO peak positions.

6 pages, 3 figures, submitted to MNRAS

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• Simulations of Early Baryonic Structure Formation with Stream Velocity: II. The Gas Fraction
• Line-Intensity Mapping: Theory Review
• The effect of relative velocity and density perturbations between baryons and dark matter on the clustering of galaxies
• Robust Velocity-induced Acoustic Oscillations at Cosmic Dawn
• Galaxy bias and primordial non-Gaussianity: insights from galaxy formation simulations with IllustrisTNG
• Low-mass suppression of the satellite luminosity function due to the supersonic baryon--cold-dark-matter relative velocity
• Probing correlated compensated isocurvature perturbations using scale-dependent galaxy bias
• Baryon-CDM isocurvature galaxy bias with IllustrisTNG
• The Gigaparsec WiggleZ Simulations: Characterising scale dependant bias and associated systematics in growth of structure measurements
• How Density Environment Changes the Influence of the Dark Matter-Baryon Streaming Velocity on the Cosmological Structure Formation
• Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey
• Large scale distribution of total mass versus luminous matter from Baryon Acoustic Oscillations: First search in the SDSS-III BOSS Data Release 10
• Imprints of Reionization in Galaxy Clustering
• Compensated Isocurvature Perturbations in the Galaxy Power Spectrum
• Formation of First Galaxies inside Density Peaks and Voids under the Influence of Dark Matter-Baryon Streaming Velocity, I: Initial Condition and Simulation Scheme
• Large scale distribution of mass versus light from Baryon Acoustic Oscillations: Measurement in the final SDSS-III BOSS Data Release 12
• Cosmological Constraints on the Global Star Formation Law of Galaxies: Insights From Baryon Acoustic Oscillation Intensity Mapping
• Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
• The Effects of Dark Matter Annihilation and Dark Matter-Baryon Velocity Offsets at Cosmic Dawn
• Cosmic voids and BAO with relative baryon-CDM perturbations