Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect
International audience Recent results of ground-based telescopes, giving high-quality measurements of the cosmic microwave background (CMB) temperature power spectrum on small scales (below 1 deg) motivate the need for an accurate model of foregrounds, which dominate the primary signal at these mult...
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ftccsdartic:oai:HAL:hal-03594444v1 2024-02-27T08:45:33+00:00 Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect Gorce, Adélie Douspis, Marian Salvati, Laura 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 https://hal.science/hal-03594444 https://hal.science/hal-03594444/document https://hal.science/hal-03594444/file/aa43351-22.pdf https://doi.org/10.1051/0004-6361/202243351 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/arxiv/2202.08698 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202243351 hal-03594444 https://hal.science/hal-03594444 https://hal.science/hal-03594444/document https://hal.science/hal-03594444/file/aa43351-22.pdf ARXIV: 2202.08698 doi:10.1051/0004-6361/202243351 INSPIRE: 2034508 info:eu-repo/semantics/OpenAccess Astron.Astrophys. https://hal.science/hal-03594444 Astron.Astrophys., 2022, 662, pp.A122. ⟨10.1051/0004-6361/202243351⟩ methods: data analysis methods: statistical cosmic background radiation dark ages reionization first stars [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] info:eu-repo/semantics/article Journal articles 2022 ftccsdartic https://doi.org/10.1051/0004-6361/202243351 2024-01-28T00:38:34Z International audience Recent results of ground-based telescopes, giving high-quality measurements of the cosmic microwave background (CMB) temperature power spectrum on small scales (below 1 deg) motivate the need for an accurate model of foregrounds, which dominate the primary signal at these multipoles. In a previous work, we have shown that cosmological information could be retrieved from the power spectrum of the thermal Sunyaev Zel’dovich (SZ) effect. In this work, we introduce a physically motivated model of the Epoch of Reionisation in the cosmological analysis of CMB data, which is coherent on all scales. In particular, at high multipoles, the power spectrum of the kinetic SZ (kSZ) effect is inferred from a set of cosmological and reionisation parameters by a machine-learning algorithm. First including an asymmetric parameterisation of the reionisation history in the Planck 2018 data analysis, we retrieve a value of the Thomson optical depth consistent with previous results, but stemming from a completely different history of reionisation in which the first luminous sources light up as early as z = 15. Considering the latest small-scale data from the South Pole telescope (SPT) and letting the cosmology free to vary, we find that including the new cosmology-dependent tSZ and kSZ spectra helps tighten the constraints on their amplitudes by breaking their degeneracy. We report a 5σ measurement of the kSZ signal at ℓ = 3000, D3000kSZ = 3.4−0.3+0.5 μK2 at the 68% confidence level (C.L.), marginalised over cosmology, as well as an upper limit on the patchy signal from reionisation D3000pkSZ < 1.6 μK2 (95% C.L.). Additionally, we find that the SPT data favour slightly earlier reionisation scenarios than Planck, leading to τ = 0.062−0.015+0.012 and a reionisation midpoint zre = 7.9−1.3+1.1 (68% C.L.), which is in line with constraints from high-redshift quasars and galaxies.Key words: methods: data analysis / methods: statistical / cosmic background radiation / dark ages, reionization, first stars Article in Journal/Newspaper South pole Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) South Pole Astronomy & Astrophysics 662 A122 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
methods: data analysis methods: statistical cosmic background radiation dark ages reionization first stars [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
spellingShingle |
methods: data analysis methods: statistical cosmic background radiation dark ages reionization first stars [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] Gorce, Adélie Douspis, Marian Salvati, Laura Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
topic_facet |
methods: data analysis methods: statistical cosmic background radiation dark ages reionization first stars [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] |
description |
International audience Recent results of ground-based telescopes, giving high-quality measurements of the cosmic microwave background (CMB) temperature power spectrum on small scales (below 1 deg) motivate the need for an accurate model of foregrounds, which dominate the primary signal at these multipoles. In a previous work, we have shown that cosmological information could be retrieved from the power spectrum of the thermal Sunyaev Zel’dovich (SZ) effect. In this work, we introduce a physically motivated model of the Epoch of Reionisation in the cosmological analysis of CMB data, which is coherent on all scales. In particular, at high multipoles, the power spectrum of the kinetic SZ (kSZ) effect is inferred from a set of cosmological and reionisation parameters by a machine-learning algorithm. First including an asymmetric parameterisation of the reionisation history in the Planck 2018 data analysis, we retrieve a value of the Thomson optical depth consistent with previous results, but stemming from a completely different history of reionisation in which the first luminous sources light up as early as z = 15. Considering the latest small-scale data from the South Pole telescope (SPT) and letting the cosmology free to vary, we find that including the new cosmology-dependent tSZ and kSZ spectra helps tighten the constraints on their amplitudes by breaking their degeneracy. We report a 5σ measurement of the kSZ signal at ℓ = 3000, D3000kSZ = 3.4−0.3+0.5 μK2 at the 68% confidence level (C.L.), marginalised over cosmology, as well as an upper limit on the patchy signal from reionisation D3000pkSZ < 1.6 μK2 (95% C.L.). Additionally, we find that the SPT data favour slightly earlier reionisation scenarios than Planck, leading to τ = 0.062−0.015+0.012 and a reionisation midpoint zre = 7.9−1.3+1.1 (68% C.L.), which is in line with constraints from high-redshift quasars and galaxies.Key words: methods: data analysis / methods: statistical / cosmic background radiation / dark ages, reionization, first stars |
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 |
Gorce, Adélie Douspis, Marian Salvati, Laura |
author_facet |
Gorce, Adélie Douspis, Marian Salvati, Laura |
author_sort |
Gorce, Adélie |
title |
Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
title_short |
Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
title_full |
Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
title_fullStr |
Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
title_full_unstemmed |
Retrieving cosmological information from small-scale CMB foregrounds - II. The kinetic Sunyaev Zel’dovich effect |
title_sort |
retrieving cosmological information from small-scale cmb foregrounds - ii. the kinetic sunyaev zel’dovich effect |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03594444 https://hal.science/hal-03594444/document https://hal.science/hal-03594444/file/aa43351-22.pdf https://doi.org/10.1051/0004-6361/202243351 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Astron.Astrophys. https://hal.science/hal-03594444 Astron.Astrophys., 2022, 662, pp.A122. ⟨10.1051/0004-6361/202243351⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/arxiv/2202.08698 info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/202243351 hal-03594444 https://hal.science/hal-03594444 https://hal.science/hal-03594444/document https://hal.science/hal-03594444/file/aa43351-22.pdf ARXIV: 2202.08698 doi:10.1051/0004-6361/202243351 INSPIRE: 2034508 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1051/0004-6361/202243351 |
container_title |
Astronomy & Astrophysics |
container_volume |
662 |
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A122 |
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1792054804382482432 |