Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal
Abstract
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.
- Authors:
-
- Argonne National Lab. (ANL), Lemont, IL (United States); The Univ. of Chicago, Chicago, IL (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- McGill Univ., Montreal, QC (Canada)
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1350692
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Accepted Manuscript
- Journal Name:
- The Astrophysical Journal (Online)
- Additional Journal Information:
- Journal Name: The Astrophysical Journal (Online); Journal Volume: 823; Journal Issue: 2; Journal ID: ISSN 1538-4357
- Publisher:
- Institute of Physics (IOP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS; cosmic background radiation; cosmology: theory; galaxies: clusters: intracluster medium
Citation Formats
Flender, Samuel, Bleem, Lindsey, Finkel, Hal, Habib, Salman, Heitmann, Katrin, and Holder, Gilbert. Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal. United States: N. p., 2016.
Web. doi:10.3847/0004-637X/823/2/98.
Flender, Samuel, Bleem, Lindsey, Finkel, Hal, Habib, Salman, Heitmann, Katrin, & Holder, Gilbert. Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal. United States. https://doi.org/10.3847/0004-637X/823/2/98
Flender, Samuel, Bleem, Lindsey, Finkel, Hal, Habib, Salman, Heitmann, Katrin, and Holder, Gilbert. Thu .
"Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal". United States. https://doi.org/10.3847/0004-637X/823/2/98. https://www.osti.gov/servlets/purl/1350692.
@article{osti_1350692,
title = {Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal},
author = {Flender, Samuel and Bleem, Lindsey and Finkel, Hal and Habib, Salman and Heitmann, Katrin and Holder, Gilbert},
abstractNote = {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.},
doi = {10.3847/0004-637X/823/2/98},
journal = {The Astrophysical Journal (Online)},
number = 2,
volume = 823,
place = {United States},
year = {Thu May 26 00:00:00 EDT 2016},
month = {Thu May 26 00:00:00 EDT 2016}
}
Web of Science
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