Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal
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 intraclust...
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ftosti:oai:osti.gov:1350692 2023-07-30T04:06:55+02:00 Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal Flender, Samuel Bleem, Lindsey Finkel, Hal Habib, Salman Heitmann, Katrin Holder, Gilbert 2022-05-23 application/pdf http://www.osti.gov/servlets/purl/1350692 https://www.osti.gov/biblio/1350692 https://doi.org/10.3847/0004-637X/823/2/98 unknown http://www.osti.gov/servlets/purl/1350692 https://www.osti.gov/biblio/1350692 https://doi.org/10.3847/0004-637X/823/2/98 doi:10.3847/0004-637X/823/2/98 79 ASTRONOMY AND ASTROPHYSICS 2022 ftosti https://doi.org/10.3847/0004-637X/823/2/98 2023-07-11T09:18:00Z 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. Other/Unknown Material South pole SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) South Pole The Astrophysical Journal 823 2 98 |
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SciTec Connect (Office of Scientific and Technical Information - OSTI, U.S. Department of Energy) |
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79 ASTRONOMY AND ASTROPHYSICS |
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79 ASTRONOMY AND ASTROPHYSICS Flender, Samuel Bleem, Lindsey Finkel, Hal Habib, Salman Heitmann, Katrin Holder, Gilbert Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
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79 ASTRONOMY AND ASTROPHYSICS |
description |
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. |
author |
Flender, Samuel Bleem, Lindsey Finkel, Hal Habib, Salman Heitmann, Katrin Holder, Gilbert |
author_facet |
Flender, Samuel Bleem, Lindsey Finkel, Hal Habib, Salman Heitmann, Katrin Holder, Gilbert |
author_sort |
Flender, Samuel |
title |
Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
title_short |
Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
title_full |
Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
title_fullStr |
Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
title_full_unstemmed |
Simulations of the pairwise kinematic Sunyaev-Zel'dovich signal |
title_sort |
simulations of the pairwise kinematic sunyaev-zel'dovich signal |
publishDate |
2022 |
url |
http://www.osti.gov/servlets/purl/1350692 https://www.osti.gov/biblio/1350692 https://doi.org/10.3847/0004-637X/823/2/98 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
http://www.osti.gov/servlets/purl/1350692 https://www.osti.gov/biblio/1350692 https://doi.org/10.3847/0004-637X/823/2/98 doi:10.3847/0004-637X/823/2/98 |
op_doi |
https://doi.org/10.3847/0004-637X/823/2/98 |
container_title |
The Astrophysical Journal |
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823 |
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2 |
container_start_page |
98 |
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1772819870505762816 |