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 intra-clus...
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ftdatacite:10.48550/arxiv.1511.02843 2023-05-15T18:22:59+02:00 Simulations of the Pairwise Kinematic Sunyaev-Zel'dovich Signal Flender, Samuel Bleem, Lindsey Finkel, Hal Habib, Salman Heitmann, Katrin Holder, Gilbert 2015 https://dx.doi.org/10.48550/arxiv.1511.02843 https://arxiv.org/abs/1511.02843 unknown arXiv https://dx.doi.org/10.3847/0004-637x/823/2/98 arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2015 ftdatacite https://doi.org/10.48550/arxiv.1511.02843 https://doi.org/10.3847/0004-637x/823/2/98 2022-04-01T11:55:41Z 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 intra-cluster 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<1, using the output from a cosmological N-body simulation and including the properties of the intra-cluster 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 ~50%, relative to the naive 'gas traces mass' assumption. We demonstrate that mis-centering 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 CMB experiments, such as the South Pole Telescope, and cluster samples from optical photometric surveys, such as the Dark Energy Survey. Furthermore, 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 20σ, and up to 57σ in an optimistic scenario. Our simulated maps are publicly available at: http://www.hep.anl.gov/cosmology/ksz.html : Journal version Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences 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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Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
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 intra-cluster 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<1, using the output from a cosmological N-body simulation and including the properties of the intra-cluster 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 ~50%, relative to the naive 'gas traces mass' assumption. We demonstrate that mis-centering 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 CMB experiments, such as the South Pole Telescope, and cluster samples from optical photometric surveys, such as the Dark Energy Survey. Furthermore, 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 20σ, and up to 57σ in an optimistic scenario. Our simulated maps are publicly available at: http://www.hep.anl.gov/cosmology/ksz.html : Journal version |
format |
Text |
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 |
publisher |
arXiv |
publishDate |
2015 |
url |
https://dx.doi.org/10.48550/arxiv.1511.02843 https://arxiv.org/abs/1511.02843 |
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South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.3847/0004-637x/823/2/98 |
op_rights |
arXiv.org perpetual, non-exclusive license http://arxiv.org/licenses/nonexclusive-distrib/1.0/ |
op_doi |
https://doi.org/10.48550/arxiv.1511.02843 https://doi.org/10.3847/0004-637x/823/2/98 |
_version_ |
1766202404866359296 |