Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology
Using the novel semi-numerical code for reionization AMBER, we model the patchy kinetic Sunyaev–Zel’dovich (kSZ) effect by directly specifying the reionization history with the redshift midpoint z _mid , duration Δ _z , and asymmetry A _z . We further control the ionizing sources and radiation throu...
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ftdoajarticles:oai:doaj.org/article:87888a2c9a4d4f43ac81f190f0fb642c 2023-10-09T21:55:59+02:00 Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology Nianyi Chen Hy Trac Suvodip Mukherjee Renyue Cen 2023-01-01T00:00:00Z https://doi.org/10.3847/1538-4357/ac8481 https://doaj.org/article/87888a2c9a4d4f43ac81f190f0fb642c EN eng IOP Publishing https://doi.org/10.3847/1538-4357/ac8481 https://doaj.org/toc/1538-4357 doi:10.3847/1538-4357/ac8481 1538-4357 https://doaj.org/article/87888a2c9a4d4f43ac81f190f0fb642c The Astrophysical Journal, Vol 943, Iss 2, p 138 (2023) Cosmic microwave background radiation Sunyaev-Zeldovich effect Reionization Cosmology Astrophysics QB460-466 article 2023 ftdoajarticles https://doi.org/10.3847/1538-4357/ac8481 2023-09-10T00:41:48Z Using the novel semi-numerical code for reionization AMBER, we model the patchy kinetic Sunyaev–Zel’dovich (kSZ) effect by directly specifying the reionization history with the redshift midpoint z _mid , duration Δ _z , and asymmetry A _z . We further control the ionizing sources and radiation through the minimum halo mass M _h and the radiation mean free path λ _mfp . AMBER reproduces the free-electron number density and the patchy kSZ power spectrum of radiation–hydrodynamic simulations at the target resolution (1 Mpc h ^−1 ) with matched reionization parameters. With a suite of (2 Gpc/ h ) ^3 simulations using AMBER, we first constrain the redshift midpoint 6.0 < z _mid < 8.9 using the Planck 2018 Thomson optical depth result (95% CL). Then, assuming z _mid = 8, we find that the amplitude of ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}$ scales linearly with the duration of reionization Δ _z and is consistent with the 1 σ upper limit from South Pole Telescope (SPT) results up to Δ _z < 5.1 (Δ _z encloses 5%–95% ionization). Moreover, a shorter λ _mfp can lead to a ∼10% lower ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}$ and a flatter slope in the ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}-{{\rm{\Delta }}}_{z}$ scaling relation, thereby affecting the constraints on Δ _z at ℓ = 3000. Allowing z _mid and λ _mfp to vary simultaneously, we get spectra consistent with the SPT result (95% CL) up to Δ _z = 12.8 (but A _z > 8 is needed to ensure the end of reionization before z = 5.5). We show that constraints on the asymmetry require ∼0.1 μ k ^2 measurement accuracy at multipoles other than ℓ = 3000. Finally, we find that the amplitude and shape of the kSZ spectrum are only weakly sensitive to M _h under a fixed reionization history and radiation mean free path. Article in Journal/Newspaper South pole Directory of Open Access Journals: DOAJ Articles South Pole The Astrophysical Journal 943 2 138 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Cosmic microwave background radiation Sunyaev-Zeldovich effect Reionization Cosmology Astrophysics QB460-466 |
spellingShingle |
Cosmic microwave background radiation Sunyaev-Zeldovich effect Reionization Cosmology Astrophysics QB460-466 Nianyi Chen Hy Trac Suvodip Mukherjee Renyue Cen Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
topic_facet |
Cosmic microwave background radiation Sunyaev-Zeldovich effect Reionization Cosmology Astrophysics QB460-466 |
description |
Using the novel semi-numerical code for reionization AMBER, we model the patchy kinetic Sunyaev–Zel’dovich (kSZ) effect by directly specifying the reionization history with the redshift midpoint z _mid , duration Δ _z , and asymmetry A _z . We further control the ionizing sources and radiation through the minimum halo mass M _h and the radiation mean free path λ _mfp . AMBER reproduces the free-electron number density and the patchy kSZ power spectrum of radiation–hydrodynamic simulations at the target resolution (1 Mpc h ^−1 ) with matched reionization parameters. With a suite of (2 Gpc/ h ) ^3 simulations using AMBER, we first constrain the redshift midpoint 6.0 < z _mid < 8.9 using the Planck 2018 Thomson optical depth result (95% CL). Then, assuming z _mid = 8, we find that the amplitude of ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}$ scales linearly with the duration of reionization Δ _z and is consistent with the 1 σ upper limit from South Pole Telescope (SPT) results up to Δ _z < 5.1 (Δ _z encloses 5%–95% ionization). Moreover, a shorter λ _mfp can lead to a ∼10% lower ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}$ and a flatter slope in the ${D}_{{\ell }=3000}^{\mathrm{pkSZ}}-{{\rm{\Delta }}}_{z}$ scaling relation, thereby affecting the constraints on Δ _z at ℓ = 3000. Allowing z _mid and λ _mfp to vary simultaneously, we get spectra consistent with the SPT result (95% CL) up to Δ _z = 12.8 (but A _z > 8 is needed to ensure the end of reionization before z = 5.5). We show that constraints on the asymmetry require ∼0.1 μ k ^2 measurement accuracy at multipoles other than ℓ = 3000. Finally, we find that the amplitude and shape of the kSZ spectrum are only weakly sensitive to M _h under a fixed reionization history and radiation mean free path. |
format |
Article in Journal/Newspaper |
author |
Nianyi Chen Hy Trac Suvodip Mukherjee Renyue Cen |
author_facet |
Nianyi Chen Hy Trac Suvodip Mukherjee Renyue Cen |
author_sort |
Nianyi Chen |
title |
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
title_short |
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
title_full |
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
title_fullStr |
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
title_full_unstemmed |
Patchy Kinetic Sunyaev–Zel’dovich Effect with Controlled Reionization History and Morphology |
title_sort |
patchy kinetic sunyaev–zel’dovich effect with controlled reionization history and morphology |
publisher |
IOP Publishing |
publishDate |
2023 |
url |
https://doi.org/10.3847/1538-4357/ac8481 https://doaj.org/article/87888a2c9a4d4f43ac81f190f0fb642c |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
The Astrophysical Journal, Vol 943, Iss 2, p 138 (2023) |
op_relation |
https://doi.org/10.3847/1538-4357/ac8481 https://doaj.org/toc/1538-4357 doi:10.3847/1538-4357/ac8481 1538-4357 https://doaj.org/article/87888a2c9a4d4f43ac81f190f0fb642c |
op_doi |
https://doi.org/10.3847/1538-4357/ac8481 |
container_title |
The Astrophysical Journal |
container_volume |
943 |
container_issue |
2 |
container_start_page |
138 |
_version_ |
1779320275281641472 |