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Title: Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal

Journal Article · · The Astrophysical Journal (Online)

The pairwise kinematic Sunyaev–Zel'dovich (kSZ) signal from galaxy clusters is a probe of their line of sight momenta, and thus a potentially valuable source of cosmological information. In addition to the momenta, the amplitude of the measured signal depends on the properties of the intracluster gas and observational limitations such as errors in determining cluster centers and redshifts. In this work, we simulate the pairwise kSZ signal of clusters at $$z\lt 1$$, using the output from a cosmological N-body simulation and including the properties of the intracluster gas via a model that can be varied in post-processing. We find that modifications to the gas profile due to star formation and feedback reduce the pairwise kSZ amplitude of clusters by $$\sim 50\%$$, relative to the naive "gas traces mass" assumption. We demonstrate that miscentering can reduce the overall amplitude of the pairwise kSZ signal by up to 10%, while redshift errors can lead to an almost complete suppression of the signal at small separations. We confirm that a high-significance detection is expected from the combination of data from current generation, high-resolution cosmic microwave background experiments, such as the South Pole Telescope, and cluster samples from optical photometric surveys, such as the Dark Energy Survey. As a result, we forecast that future experiments such as Advanced ACTPol in conjunction with data from the Dark Energy Spectroscopic Instrument will yield detection significances of at least $$20\sigma $$, and up to $$57\sigma $$ in an optimistic scenario.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1350692
Journal Information:
The Astrophysical Journal (Online), Vol. 823, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 26 works
Citation information provided by
Web of Science

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Cited By (12)

The tau of galaxy clusters journal August 2016
Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope journal March 2017
Measuring galaxy cluster masses with CMB lensing using a Maximum Likelihood estimator: statistical and systematic error budgets for future experiments journal August 2017
Future constraints on halo thermodynamics from combined Sunyaev-Zel'dovich measurements journal November 2017
The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH journal May 2019
HACC Cosmological Simulations: First Data Release journal September 2019
The Outer Rim Simulation: A Path to Many-core Supercomputers journal November 2019
The Kinematic Sunyaev-Zel'dovich Effect with Projected Fields: A Novel Probe of the Baryon Distribution with Planck, WMAP, and WISE Data text January 2016
Detection of the pairwise kinematic Sunyaev-Zel'dovich effect with BOSS DR11 and the Atacama Cosmology Telescope text January 2016
The Tau of Galaxy Clusters text January 2016
Future constraints on halo thermodynamics from combined Sunyaev-Zel'dovich measurements text January 2017
The Borg Cube Simulation: Cosmological Hydrodynamics with CRK-SPH text January 2018

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