Galaxy formation on the largest scales: The impact of astrophysics on the BAO peak

Abstract

We investigate the effects of galaxy formation on the baryonic acoustic oscillations (BAO) peak by applying semi-analytic modelling techniques to the Millennium-XXL, a $3\times 10^{11}$ particle N-body simulation of similar volume to the future EUCLID survey. Our approach explicitly incorporates the effects of tidal fields and stochasticity on halo formation, as well as the presence of velocity bias, spatially correlated merger histories, and the connection of all these with the observable and physical properties of galaxies. We measure significant deviations in the shape of the BAO peak from the expectations of a linear bias model built on top of the nonlinear dark matter distribution. We find that the galaxy correlation function shows an excess close to the maximum of the BAO peak ($r\sim 110Mpc/h$) and a deficit at $r\sim 90Mpc/h$. Depending on the redshift, selection criteria and number density of the galaxy samples, these bias distortions can be up to 5% in amplitude. They are, however, largely absorbed by marginalization over nuisance parameters in current analytical modelling of the BAO peak in configuration space, in particular into the parameter that controls the broadening due to nonlinear evolution. As a result, the galaxy formation effects detected here are unlikely to bias the high-precision measurements planned by the upcoming generation of wide-field galaxy surveys.

16 pages, 15 figures

References in corpus (14)

• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• A primer on hierarchical galaxy formation: the semi-analytical approach
• Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
• Nonlinear Evolution of Baryon Acoustic Oscillations
• Assembly bias in the clustering of dark matter haloes
• Halo assembly bias and its effects on galaxy clustering
• Galaxy growth in the concordance $\Lambda$CDM cosmology
• The detectability of baryonic acoustic oscillations in future galaxy surveys
• `Eppur Si Muove': On The Motion of the Acoustic Peak in the Correlation Function
• Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields
• Satellite abundances around bright isolated galaxies
• Baryon acoustic signature in the clustering of density maxima
• The assembly bias of dark matter haloes to higher orders
• Galaxy Bias and its Effects on the Baryon Acoustic Oscillations Measurements

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