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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ftuniparissaclay:oai:HAL:hal-03355164v1 2024-06-16T07:43:13+00:00 Retrieving cosmological information from small-scale CMB foregrounds I. The thermal Sunyaev Zel'dovich effect Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila Institut d'astrophysique spatiale (IAS) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) 2021-09-27 https://hal.science/hal-03355164 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/2109.03272 hal-03355164 https://hal.science/hal-03355164 ARXIV: 2109.03272 INSPIRE: 1918629 https://hal.science/hal-03355164 2021 [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/preprint Preprints, Working Papers, . 2021 ftuniparissaclay 2024-05-17T00:04:52Z 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. Report South pole Archives ouvertes de Paris-Saclay South Pole |
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English |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] 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 |
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
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. |
author2 |
Institut d'astrophysique spatiale (IAS) Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Centre National d’Études Spatiales Paris (CNES) |
format |
Report |
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 |
HAL CCSD |
publishDate |
2021 |
url |
https://hal.science/hal-03355164 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
https://hal.science/hal-03355164 2021 |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2109.03272 hal-03355164 https://hal.science/hal-03355164 ARXIV: 2109.03272 INSPIRE: 1918629 |
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1802011017884991488 |