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Title: Scale-dependent bias and bispectrum in neutrino separate universe simulations

Journal Article · · Physical Review. D.
 [1];  [2];  [3];  [1]
  1. Stony Brook Univ., NY (United States)
  2. Univ. of Chicago, IL (United States). Enrico Fermi Inst.
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States); Univ. of Tokyo (Japan)
+ Show Author Affiliations

Cosmic background neutrinos have a large velocity dispersion, which causes the evolution of long-wavelength density perturbations to depend on scale. As such, this scale-dependent growth leads to the well-known suppression in the linear theory matter power spectrum that is used to probe neutrino mass. In this paper, we study the impact of long-wavelength density perturbations on small-scale structure formation. By performing separate universe simulations where the long-wavelength mode is absorbed into the local expansion, we measure the responses of the cold dark matter (CDM) power spectrum and halo mass function, which correspond to the squeezed-limit bispectrum and halo bias. We find that the scale-dependent evolution of the long-wavelength modes causes these quantities to depend on scale and provide simple expressions to model them in terms of scale and the amount of massive neutrinos. Importantly, this scale-dependent bias reduces the suppression in the linear halo power spectrum due to massive neutrinos by 13% and 26% for objects of bias b ¯ = 2 and b ¯ » 1 , respectively. We demonstrate with high statistical significance that the scale-dependent halo bias cannot be modeled by the CDM and neutrino density transfer functions at the time when the halos are identified. This reinforces the importance of the temporal nonlocality of structure formation, especially when the growth is scale dependent.

Research Organization:
Univ. of Chicago, IL (United States); State University of New York, Stony Brook, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); National Aeronautics and Space Administration (NASA)
Grant/Contract Number:
SC0009924; PHY-1620628; SC0017848; ATPNNX15AK22G; FG02-13ER41958; PHY-1125897
OSTI ID:
1593994
Alternate ID(s):
OSTI ID: 1454649; OSTI ID: 1984850
Journal Information:
Physical Review. D., Vol. 97, Issue 12; ISSN 2470-0010
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 42 works
Citation information provided by
Web of Science

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The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes text January 2011
Effects of the neutrino mass splitting on the non-linear matter power spectrum text January 2012
An efficient implementation of massive neutrinos in non-linear structure formation simulations text January 2012
Neutrino clustering around spherical dark matter halos text January 2013
Cosmology with massive neutrinos II: on the universality of the halo mass function and bias text January 2013
Cosmology with massive neutrinos III: the halo mass function and an application to galaxy clusters text January 2013
Super-Sample Covariance in Simulations text January 2014
Position-dependent power spectrum of the large-scale structure: a novel method to measure the squeezed-limit bispectrum text January 2014
The power spectrum and bispectrum of SDSS DR11 BOSS galaxies I: bias and gravity text January 2014
Separate Universe Simulations text January 2014
The angle-averaged squeezed limit of nonlinear matter N-point functions text January 2015
On the importance of nonlinear couplings in large-scale neutrino streams text January 2015
The Mira-Titan Universe: Precision Predictions for Dark Energy Surveys text January 2015
Advanced ACTPol Cryogenic Detector Arrays and Readout text January 2015
Precision measurement of the local bias of dark matter halos text January 2015
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Neutrino mass without cosmic variance text January 2016
Quintessential Scale Dependence from Separate Universe Simulations text January 2016
Response Approach to the Matter Power Spectrum Covariance text January 2017
Toward a Measurement of the Cosmological Geometry at z~2: Predicting Lyman-alpha Forest Correlation in Three Dimensions, and the Potential of Future Data Sets text January 2001
The evolution substructure I: a new identification method text January 2004
Power Spectra for Cold Dark Matter and its Variants text January 1997
Weighing Neutrinos with Galaxy Surveys text January 1997
Determination of Solar Neutrino Oscillation Parameters using 1496 Days of Super-Kamiokande-I Data text January 2002
Complete results for five years of GNO solar neutrino observations text January 2005
Response approach to the squeezed-limit bispectrum: application to the correlation of quasar and Lyman-$α$ forest power spectrum text January 2017

Cited By (10)

Bias due to neutrinos must not uncorrect'd go journal September 2018
The promising future of a robust cosmological neutrino mass measurement journal January 2019
Measuring neutrino masses with large-scale structure: Euclid forecast with controlled theoretical error journal November 2019
An efficient and accurate hybrid method for simulating non-linear neutrino structure journal August 2018
How to add massive neutrinos to your ΛCDM simulation – extending cosmology rescaling algorithms journal September 2019
Phenomenology of modified gravity at recombination journal February 2019
Measurement of Void Bias Using Separate Universe Simulations journal January 2020
An Efficient and Accurate Hybrid Method for Simulating Non-Linear Neutrino Structure text January 2018
Phenomenology of Modified Gravity at Recombination text January 2018
First detection of scale-dependent linear halo bias in $N$-body simulations with massive neutrinos text January 2018

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