Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal
ABSTRACT The patchy kinetic Sunyaev–Zel’dovich (kSZ) signal is an integral probe of the timing and morphology of the epoch of reionization (EoR). Recent observations have claimed a low signal-to-noise (S/N) measurement, with a dramatic increase in S/N expected in the near future. In this work, we qu...
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croxfordunivpr:10.1093/mnras/stad2961 2024-04-28T08:38:55+00:00 Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal Nikolić, Ivan Mesinger, Andrei Qin, Yuxiang Gorce, Adélie MUR CIFAR 2023 http://dx.doi.org/10.1093/mnras/stad2961 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad2961/51792521/stad2961.pdf https://academic.oup.com/mnras/article-pdf/526/2/3170/51991617/stad2961.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Monthly Notices of the Royal Astronomical Society volume 526, issue 2, page 3170-3183 ISSN 0035-8711 1365-2966 Space and Planetary Science Astronomy and Astrophysics journal-article 2023 croxfordunivpr https://doi.org/10.1093/mnras/stad2961 2024-04-09T07:58:23Z ABSTRACT The patchy kinetic Sunyaev–Zel’dovich (kSZ) signal is an integral probe of the timing and morphology of the epoch of reionization (EoR). Recent observations have claimed a low signal-to-noise (S/N) measurement, with a dramatic increase in S/N expected in the near future. In this work, we quantify what we can learn about the EoR from the kSZ signal. We perform Bayesian inference by sampling galaxy properties and using forward-models of the kSZ as well as other EoR and galaxy observations in the likelihood. Including the recent kSZ measurement obtained by the South Pole Telescope ($\mathcal {D}_{3000}^{\textrm {pkSZ}} = 1.1_{-0.7}^{+1.1} \mu$ K2) shifts the posterior distribution in favour of faster and later reionization models, resulting in lower values of the optical depth to the cosmic microwave background: $\tau _e = 0.052_{-0.008}^{+0.009}$ with a 68 per cent confidence interval (CI). The combined EoR and ultraviolet luminosity function observations also imply a typical ionizing escape fraction of $0.04_{-0.03}^{+0.05}$ (95 per cent CI), without a strong dependence on halo mass. We show how the patchy kSZ power from our posterior depends on the midpoint and duration of reionization: a popular parametrization of EoR timing. For a given midpoint and duration, the EoR morphology only has a few per cent impact on the patchy kSZ power in our posterior. However, a physical model is needed to obtain tight constraints from the current low S/N patchy kSZ measurement, as it allows us to take advantage of complimentary high-z observations. Future high S/N detections of the patchy kSZ should decrease the current uncertainties on the timing of the EoR by factors of ∼2–3. Article in Journal/Newspaper South pole Oxford University Press Monthly Notices of the Royal Astronomical Society 526 2 3170 3183 |
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Oxford University Press |
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croxfordunivpr |
language |
English |
topic |
Space and Planetary Science Astronomy and Astrophysics |
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Space and Planetary Science Astronomy and Astrophysics Nikolić, Ivan Mesinger, Andrei Qin, Yuxiang Gorce, Adélie Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
topic_facet |
Space and Planetary Science Astronomy and Astrophysics |
description |
ABSTRACT The patchy kinetic Sunyaev–Zel’dovich (kSZ) signal is an integral probe of the timing and morphology of the epoch of reionization (EoR). Recent observations have claimed a low signal-to-noise (S/N) measurement, with a dramatic increase in S/N expected in the near future. In this work, we quantify what we can learn about the EoR from the kSZ signal. We perform Bayesian inference by sampling galaxy properties and using forward-models of the kSZ as well as other EoR and galaxy observations in the likelihood. Including the recent kSZ measurement obtained by the South Pole Telescope ($\mathcal {D}_{3000}^{\textrm {pkSZ}} = 1.1_{-0.7}^{+1.1} \mu$ K2) shifts the posterior distribution in favour of faster and later reionization models, resulting in lower values of the optical depth to the cosmic microwave background: $\tau _e = 0.052_{-0.008}^{+0.009}$ with a 68 per cent confidence interval (CI). The combined EoR and ultraviolet luminosity function observations also imply a typical ionizing escape fraction of $0.04_{-0.03}^{+0.05}$ (95 per cent CI), without a strong dependence on halo mass. We show how the patchy kSZ power from our posterior depends on the midpoint and duration of reionization: a popular parametrization of EoR timing. For a given midpoint and duration, the EoR morphology only has a few per cent impact on the patchy kSZ power in our posterior. However, a physical model is needed to obtain tight constraints from the current low S/N patchy kSZ measurement, as it allows us to take advantage of complimentary high-z observations. Future high S/N detections of the patchy kSZ should decrease the current uncertainties on the timing of the EoR by factors of ∼2–3. |
author2 |
MUR CIFAR |
format |
Article in Journal/Newspaper |
author |
Nikolić, Ivan Mesinger, Andrei Qin, Yuxiang Gorce, Adélie |
author_facet |
Nikolić, Ivan Mesinger, Andrei Qin, Yuxiang Gorce, Adélie |
author_sort |
Nikolić, Ivan |
title |
Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
title_short |
Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
title_full |
Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
title_fullStr |
Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
title_full_unstemmed |
Inferring reionization and galaxy properties from the patchy kinetic Sunyaev–Zel’dovich signal |
title_sort |
inferring reionization and galaxy properties from the patchy kinetic sunyaev–zel’dovich signal |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/mnras/stad2961 https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad2961/51792521/stad2961.pdf https://academic.oup.com/mnras/article-pdf/526/2/3170/51991617/stad2961.pdf |
genre |
South pole |
genre_facet |
South pole |
op_source |
Monthly Notices of the Royal Astronomical Society volume 526, issue 2, page 3170-3183 ISSN 0035-8711 1365-2966 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/mnras/stad2961 |
container_title |
Monthly Notices of the Royal Astronomical Society |
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526 |
container_issue |
2 |
container_start_page |
3170 |
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3183 |
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1797570177315897344 |