A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck
We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the ground-bas...
Published in: | Journal of Cosmology and Astroparticle Physics |
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 https://doi.org/10.1088/1475-7516/2023/02/041 https://findresearcher.sdu.dk/ws/files/227646635/Cruz_2023_J._Cosmol._Astropart._Phys._2023_041.pdf |
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ftsydanskunivpub:oai:sdu.dk:publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 2024-05-12T08:11:15+00:00 A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck Cruz, Juan S. Niedermann, Florian Sloth, Martin S. 2023-02-22 application/pdf https://portal.findresearcher.sdu.dk/da/publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 https://doi.org/10.1088/1475-7516/2023/02/041 https://findresearcher.sdu.dk/ws/files/227646635/Cruz_2023_J._Cosmol._Astropart._Phys._2023_041.pdf eng eng https://portal.findresearcher.sdu.dk/da/publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 info:eu-repo/semantics/openAccess Cruz , J S , Niedermann , F & Sloth , M S 2023 , ' A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck ' , Journal of Cosmology and Astroparticle Physics , vol. 2023 , no. 2 , 041 . https://doi.org/10.1088/1475-7516/2023/02/041 astro-ph.CO hep-ph hep-th cosmological parameters from CMBR dark energy theory cosmology of theories beyond the SM cosmological phase transitions article 2023 ftsydanskunivpub https://doi.org/10.1088/1475-7516/2023/02/041 2024-04-17T15:22:35Z We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the ground-based CMB telescopes Atacama Cosmology Telescope (ACT), the South Pole Telescope (SPT), and the BICEP/Keck telescopes, employing an updated likelihood for the local measurements coming from the SH 0 ES collaboration. Using the SH 0 ES prior on H 0 , the combined analysis with Baryonic Acoustic Oscillations (BAO), Pantheon, Planck and ACT improves the best-fit by Δχ 2 = -15.9 with respect to ΛCDM, favors a non-zero fractional contribution of NEDE, f NEDE > 0, by 4.8σ, and gives a best-fit value for the Hubble constant of H 0 = 72.09 km/s/Mpc (mean 71.49 ± 0.82 with 68% C.L.). A similar analysis using SPT instead of ACT yields consistent results with a Δχ 2 = -23.1 over ΛCDM, a preference for non-zero f NEDE of 4.7σ and a best-fit value of H 0 = 71.77 km/s/Mpc (mean 71.43 ± 0.85 with 68% C.L.). We also provide the constraints on the inflation parameters r and n s coming from NEDE, including the BICEP/Keck 2018 data, and show that the allowed upper value on the tensor-scalar ratio is consistent with the ΛCDM bound, but, as also originally found, with a more blue scalar spectrum implying that the simplest curvaton model is now favored over the Starobinsky inflation model. Article in Journal/Newspaper South pole University of Southern Denmark Research Portal Hubble ENVELOPE(158.317,158.317,-80.867,-80.867) South Pole Journal of Cosmology and Astroparticle Physics 2023 02 041 |
institution |
Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
language |
English |
topic |
astro-ph.CO hep-ph hep-th cosmological parameters from CMBR dark energy theory cosmology of theories beyond the SM cosmological phase transitions |
spellingShingle |
astro-ph.CO hep-ph hep-th cosmological parameters from CMBR dark energy theory cosmology of theories beyond the SM cosmological phase transitions Cruz, Juan S. Niedermann, Florian Sloth, Martin S. A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
topic_facet |
astro-ph.CO hep-ph hep-th cosmological parameters from CMBR dark energy theory cosmology of theories beyond the SM cosmological phase transitions |
description |
We examine further the ability of the New Early Dark Energy model (NEDE) to resolve the current tension between the Cosmic Microwave Background (CMB) and local measurements of H 0 and the consequences for inflation. We perform new Bayesian analyses, including the current datasets from the ground-based CMB telescopes Atacama Cosmology Telescope (ACT), the South Pole Telescope (SPT), and the BICEP/Keck telescopes, employing an updated likelihood for the local measurements coming from the SH 0 ES collaboration. Using the SH 0 ES prior on H 0 , the combined analysis with Baryonic Acoustic Oscillations (BAO), Pantheon, Planck and ACT improves the best-fit by Δχ 2 = -15.9 with respect to ΛCDM, favors a non-zero fractional contribution of NEDE, f NEDE > 0, by 4.8σ, and gives a best-fit value for the Hubble constant of H 0 = 72.09 km/s/Mpc (mean 71.49 ± 0.82 with 68% C.L.). A similar analysis using SPT instead of ACT yields consistent results with a Δχ 2 = -23.1 over ΛCDM, a preference for non-zero f NEDE of 4.7σ and a best-fit value of H 0 = 71.77 km/s/Mpc (mean 71.43 ± 0.85 with 68% C.L.). We also provide the constraints on the inflation parameters r and n s coming from NEDE, including the BICEP/Keck 2018 data, and show that the allowed upper value on the tensor-scalar ratio is consistent with the ΛCDM bound, but, as also originally found, with a more blue scalar spectrum implying that the simplest curvaton model is now favored over the Starobinsky inflation model. |
format |
Article in Journal/Newspaper |
author |
Cruz, Juan S. Niedermann, Florian Sloth, Martin S. |
author_facet |
Cruz, Juan S. Niedermann, Florian Sloth, Martin S. |
author_sort |
Cruz, Juan S. |
title |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_short |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_full |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_fullStr |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_full_unstemmed |
A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck |
title_sort |
grounded perspective on new early dark energy using act, spt, and bicep/keck |
publishDate |
2023 |
url |
https://portal.findresearcher.sdu.dk/da/publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 https://doi.org/10.1088/1475-7516/2023/02/041 https://findresearcher.sdu.dk/ws/files/227646635/Cruz_2023_J._Cosmol._Astropart._Phys._2023_041.pdf |
long_lat |
ENVELOPE(158.317,158.317,-80.867,-80.867) |
geographic |
Hubble South Pole |
geographic_facet |
Hubble South Pole |
genre |
South pole |
genre_facet |
South pole |
op_source |
Cruz , J S , Niedermann , F & Sloth , M S 2023 , ' A grounded perspective on new early dark energy using ACT, SPT, and BICEP/Keck ' , Journal of Cosmology and Astroparticle Physics , vol. 2023 , no. 2 , 041 . https://doi.org/10.1088/1475-7516/2023/02/041 |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/f0275187-0c8d-44f1-afba-2f49ef596ec3 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1088/1475-7516/2023/02/041 |
container_title |
Journal of Cosmology and Astroparticle Physics |
container_volume |
2023 |
container_issue |
02 |
container_start_page |
041 |
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1798854908566306816 |