Retrieving cosmological information from small-scale CMB foregrounds
International audience We propose a new analysis of small-scale cosmic microwave background (CMB) data by introducing the cosmological dependency of the foreground signals, focussing first on the thermal Sunyaev-Zel’dovich (tSZ) power spectrum, derived from the halo model. We analyse the latest obse...
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ftunivnantes:oai:HAL:hal-03606609v1 2023-05-15T18:22:55+02:00 Retrieving cosmological information from small-scale CMB foregrounds 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) 2022-03 https://hal.science/hal-03606609 https://hal.science/hal-03606609/document https://hal.science/hal-03606609/file/aa42004-21.pdf https://doi.org/10.1051/0004-6361/202142004 en eng HAL CCSD EDP Sciences info:eu-repo/semantics/altIdentifier/arxiv/2109.03272 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202142004 hal-03606609 https://hal.science/hal-03606609 https://hal.science/hal-03606609/document https://hal.science/hal-03606609/file/aa42004-21.pdf ARXIV: 2109.03272 doi:10.1051/0004-6361/202142004 info:eu-repo/semantics/OpenAccess ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.science/hal-03606609 Astronomy and Astrophysics - A&A, 2022, 659, pp.A99. ⟨10.1051/0004-6361/202142004⟩ cosmic background radiation cosmological parameters large-scale structure of Universe methods: numerical [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1051/0004-6361/202142004 2023-03-08T01:58:59Z International audience We propose a new analysis of small-scale cosmic microwave background (CMB) data by introducing the cosmological dependency of the foreground signals, focussing 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-ℓ power (cross) spectra at 95, 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 combined for the first time the Planck tSZ data with SPT high-ℓ to derive new constraints. Finally, we show how the amplitude of the remaining kinetic SZ power spectrum varies depending on the assumptions made on both tSZ and cosmological parameters. These results show the importance of a thorough modelling of foregrounds in the cosmological analysis of small-scale CMB data. Reliable constraints on cosmological parameters can only be achieved once other significant foregrounds, such as the kinetic SZ and the cosmic infrared background (CIB), are also properly accounted for. Article in Journal/Newspaper South pole Université de Nantes: HAL-UNIV-NANTES South Pole Astronomy & Astrophysics 659 A99 |
institution |
Open Polar |
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Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
cosmic background radiation cosmological parameters large-scale structure of Universe methods: numerical [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
spellingShingle |
cosmic background radiation cosmological parameters large-scale structure of Universe methods: numerical [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Douspis, Marian Salvati, Laura Gorce, Adélie Aghanim, Nabila Retrieving cosmological information from small-scale CMB foregrounds |
topic_facet |
cosmic background radiation cosmological parameters large-scale structure of Universe methods: numerical [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience We propose a new analysis of small-scale cosmic microwave background (CMB) data by introducing the cosmological dependency of the foreground signals, focussing 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-ℓ power (cross) spectra at 95, 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 combined for the first time the Planck tSZ data with SPT high-ℓ to derive new constraints. Finally, we show how the amplitude of the remaining kinetic SZ power spectrum varies depending on the assumptions made on both tSZ and cosmological parameters. These results show the importance of a thorough modelling of foregrounds in the cosmological analysis of small-scale CMB data. Reliable constraints on cosmological parameters can only be achieved once other significant foregrounds, such as the kinetic SZ and the cosmic infrared background (CIB), are also properly accounted for. |
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 |
Article in Journal/Newspaper |
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 |
title_short |
Retrieving cosmological information from small-scale CMB foregrounds |
title_full |
Retrieving cosmological information from small-scale CMB foregrounds |
title_fullStr |
Retrieving cosmological information from small-scale CMB foregrounds |
title_full_unstemmed |
Retrieving cosmological information from small-scale CMB foregrounds |
title_sort |
retrieving cosmological information from small-scale cmb foregrounds |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03606609 https://hal.science/hal-03606609/document https://hal.science/hal-03606609/file/aa42004-21.pdf https://doi.org/10.1051/0004-6361/202142004 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
ISSN: 0004-6361 EISSN: 1432-0756 Astronomy and Astrophysics - A&A https://hal.science/hal-03606609 Astronomy and Astrophysics - A&A, 2022, 659, pp.A99. ⟨10.1051/0004-6361/202142004⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2109.03272 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202142004 hal-03606609 https://hal.science/hal-03606609 https://hal.science/hal-03606609/document https://hal.science/hal-03606609/file/aa42004-21.pdf ARXIV: 2109.03272 doi:10.1051/0004-6361/202142004 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/0004-6361/202142004 |
container_title |
Astronomy & Astrophysics |
container_volume |
659 |
container_start_page |
A99 |
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1766202327338844160 |