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Title: Biased tracers of two fluids in the Lagrangian picture

Journal Article · · Journal of Cosmology and Astroparticle Physics
 [1];  [2];  [2]
  1. Univ. of California, Berkeley, CA (United States)
  2. Univ. of California, Berkeley, CA (United States); Berkeley Center for Cosmological Physics, Berkeley, CA (United States)
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We explore Lagrangian perturbation theory (LPT) for biased tracers in the presence of two fluids, focusing on the case of cold dark matter (CDM) and baryons. The presence of two fluids induces corrections to the Lagrangian bias expansion and tracer advection, both of which we formulate as expansions in the three linear modes of the Lagrangian equations of motion. We compute the linear-order two-fluid corrections in the Zeldovich approximation, finding that modifications to the bias expansion and tracer advection both enter as percent-level corrections over a large range of wavenumbers at low redshift and draw parallels with the Eulerian formalism. We then discuss nonlinear corrections in the two-fluid picture, and calculate contributions from the relative velocity effect ($$\propto$$ v$$_r^2$$) at one loop order. Finally, we conduct an exploratory Fisher analysis to assess the impact of two-fluid corrections on baryon acoustic oscillations (BAO) measurements, finding that while modest values of the relative bias parameters can introduce systematic biases in the measured BAO scale of up to 0.5 $$σ$$, fitting for these effects as additional parameters increases the error bar by less than 30% across a wide range of bias values.

Research Organization:
University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Grant/Contract Number:
SC0017860; AC02-05CH11231; DGE 1106400; 1713791
OSTI ID:
1594717
Alternate ID(s):
OSTI ID: 1605240
Journal Information:
Journal of Cosmology and Astroparticle Physics, Vol. 2019, Issue 06; ISSN 1475-7516
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 20 works
Citation information provided by
Web of Science

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Review of Particle Physics text January 2008
Large-scale BAO signatures of the smallest galaxies text January 2010
Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields text January 2010
Supersonic relative velocity effect on the baryonic acoustic oscillation measurements text January 2011
Cosmology and fundamental physics with the Euclid satellite text January 2018
Cosmological perturbation theory for baryons and dark matter: One-loop corrections in the renormalized perturbation theory framework text January 2010
Estimates for the impact of ultraviolet background fluctuations on galaxy clustering measurements text January 2019
Review of Particle Physics text January 2018
Review of Particle Physics text January 2012
Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space text January 2007
Cosmological Non-Linearities as an Effective Fluid text January 2010
Relative velocity of dark matter and baryonic fluids and the formation of the first structures text January 2010
Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields text January 2010
The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes text January 2011
Nonlinear Behavior of Baryon Acoustic Oscillations from the Zel'dovich Approximation Using a Non-Fourier Perturbation Approach text January 2012
Cosmology and fundamental physics with the Euclid satellite text January 2012
The Effective Field Theory of Cosmological Large Scale Structures text January 2012
Convolution Lagrangian perturbation theory for biased tracers text January 2012
Cosmology with massive neutrinos II: on the universality of the halo mass function and bias text January 2013
The Lagrangian-space Effective Field Theory of Large Scale Structures text January 2013
The Zeldovich approximation text January 2014
Velocity bias in the distribution of dark matter halos text January 2014
A Lagrangian effective field theory text January 2015
Perturbation theory, effective field theory, and oscillations in the power spectrum text January 2015
Streaming velocities and the baryon-acoustic oscillation scale text January 2015
The effect of relative velocity and density perturbations between baryons and dark matter on the clustering of galaxies text January 2016
Large-Scale Galaxy Bias text January 2016
Efficient Computation of Galaxy Bias with Neutrinos and Other Relics text January 2018
Large-Scale Structure of the Universe and Cosmological Perturbation Theory text January 2001
Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak text January 2006
Measuring cosmological parameters with galaxy surveys text January 1997
The bias field of dark matter haloes text January 1997
On the effect of the ionizing background on the Lyα forest autocorrelation function journal June 2014
Estimates for the impact of ultraviolet background fluctuations on galaxy clustering measurements journal March 2019
Modeling scale-dependent bias on the baryonic acoustic scale with the statistics of peaks of Gaussian random fields text January 2010
Velocity bias in the distribution of dark matter halos text January 2014
The Effective Field Theory of Large-Scale Structure in the presence of Massive Neutrinos preprint January 2017
A new scale in the bias expansion text January 2018
The bias field of dark matter haloes text January 1997

Cited By (5)

The reconstructed power spectrum in the Zeldovich approximation journal September 2019
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensing journal August 2019
Measuring dark matter-neutrino relative velocity on cosmological scales journal January 2020
Constraining primordial non-Gaussianity using two galaxy surveys and CMB lensing text January 2019
The Reconstructed Power Spectrum in the Zeldovich Approximation text January 2019

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