Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect
We propose a new analysis of small scale CMB data by introducing the cosmological dependency of the foreground signals, focusing first on the thermal Sunyaev-Zel'dovich (tSZ) power spectrum, derived from the halo model. We analyse the latest observations by the South Pole Telescope (SPT) of the...
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ftdatacite:10.48550/arxiv.2109.03272 2023-05-15T18:22:41+02:00 Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila 2021 https://dx.doi.org/10.48550/arxiv.2109.03272 https://arxiv.org/abs/2109.03272 unknown arXiv https://dx.doi.org/10.1051/0004-6361/202142004 Creative Commons Attribution Non Commercial Share Alike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode cc-by-nc-sa-4.0 CC-BY-NC-SA Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences article-journal Article ScholarlyArticle Text 2021 ftdatacite https://doi.org/10.48550/arxiv.2109.03272 https://doi.org/10.1051/0004-6361/202142004 2022-04-01T17:43:09Z We propose a new analysis of small scale CMB data by introducing the cosmological dependency of the foreground signals, focusing first on the thermal Sunyaev-Zel'dovich (tSZ) power spectrum, derived from the halo model. We analyse the latest observations by the South Pole Telescope (SPT) of the high-$\ell$ power (cross) spectra at 90, 150 and 220 GHz, as the sum of CMB and tSZ signals, both depending on cosmological parameters, and remaining contaminants. In order to perform faster analyses, we propose a new tSZ modelling based on machine learning algorithms (namely Random Forest). We show that the additional information contained in the tSZ power spectrum tightens constraints on cosmological and tSZ scaling relation parameters. We combine for the first time the Planck tSZ data with SPT high-$\ell$ to derive even stronger constraints. Finally, we show how the amplitude of the remaining kSZ power spectrum varies depending on the assumptions made on both tSZ and cosmological parameters. : Accepted in A&A, Random Forest code for tSZ spectra computation is available on IAS SZ portal SZDB: https://szdb.osups.universite-paris-saclay.fr/ Text South pole DataCite Metadata Store (German National Library of Science and Technology) South Pole |
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DataCite Metadata Store (German National Library of Science and Technology) |
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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 Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
topic_facet |
Cosmology and Nongalactic Astrophysics astro-ph.CO FOS Physical sciences |
description |
We propose a new analysis of small scale CMB data by introducing the cosmological dependency of the foreground signals, focusing first on the thermal Sunyaev-Zel'dovich (tSZ) power spectrum, derived from the halo model. We analyse the latest observations by the South Pole Telescope (SPT) of the high-$\ell$ power (cross) spectra at 90, 150 and 220 GHz, as the sum of CMB and tSZ signals, both depending on cosmological parameters, and remaining contaminants. In order to perform faster analyses, we propose a new tSZ modelling based on machine learning algorithms (namely Random Forest). We show that the additional information contained in the tSZ power spectrum tightens constraints on cosmological and tSZ scaling relation parameters. We combine for the first time the Planck tSZ data with SPT high-$\ell$ to derive even stronger constraints. Finally, we show how the amplitude of the remaining kSZ power spectrum varies depending on the assumptions made on both tSZ and cosmological parameters. : Accepted in A&A, Random Forest code for tSZ spectra computation is available on IAS SZ portal SZDB: https://szdb.osups.universite-paris-saclay.fr/ |
format |
Text |
author |
Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila |
author_facet |
Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila |
author_sort |
Douspis, Marian |
title |
Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
title_short |
Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
title_full |
Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
title_fullStr |
Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
title_full_unstemmed |
Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect |
title_sort |
retrieving cosmological information from small-scale cmb foregrounds i. the thermal sunyaev zel'dovich effect |
publisher |
arXiv |
publishDate |
2021 |
url |
https://dx.doi.org/10.48550/arxiv.2109.03272 https://arxiv.org/abs/2109.03272 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_relation |
https://dx.doi.org/10.1051/0004-6361/202142004 |
op_rights |
Creative Commons Attribution Non Commercial Share Alike 4.0 International https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode cc-by-nc-sa-4.0 |
op_rightsnorm |
CC-BY-NC-SA |
op_doi |
https://doi.org/10.48550/arxiv.2109.03272 https://doi.org/10.1051/0004-6361/202142004 |
_version_ |
1766202096128884736 |