Exploring cosmic origins with CORE

Cosmological parameters

CORE, S. Clesse

Research output: Contribution to journalArticle

Abstract

We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume ΛCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base ΛCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. In addition to assessing the improvement on the precision of individual parameters, we also forecast the post-CORE overall reduction of the allowed parameter space with figures of merit for various models increasing by as much as ∼ 107 as compared to Planck 2015, and 105 with respect to Planck 2015 + future BAO measurements.

Original languageEnglish
Article number017
JournalJournal of Cosmology and Astroparticle Physics
Volume2018
Issue number4
DOIs
Publication statusPublished - 5 Apr 2018

Fingerprint

forecasting
physics
astrophysics
universe
microwaves
sensitivity
space missions
European Space Agency
dark energy
figure of merit
cleaning
contaminants
birefringence
proposals
baryons
dark matter
neutrinos
helium
curvature
telescopes

Keywords

  • CMBR experiments
  • cosmological parameters from CMBR
  • neutrino masses from cosmology

Cite this

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title = "Exploring cosmic origins with CORE: Cosmological parameters",
abstract = "We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume ΛCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base ΛCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. In addition to assessing the improvement on the precision of individual parameters, we also forecast the post-CORE overall reduction of the allowed parameter space with figures of merit for various models increasing by as much as ∼ 107 as compared to Planck 2015, and 105 with respect to Planck 2015 + future BAO measurements.",
keywords = "CMBR experiments, cosmological parameters from CMBR, neutrino masses from cosmology",
author = "CORE and Valentino, {E. Di} and T. Brinckmann and M. Gerbino and V. Poulin and Bouchet, {F. R.} and J. Lesgourgues and A. Melchiorri and J. Chluba and S. Clesse and J. Delabrouille and C. Dvorkin and F. Forastieri and S. Galli and Hooper, {D. C.} and M. Lattanzi and Martins, {C. J.A.P.} and L. Salvati and G. Cabass and A. Caputo and E. Giusarma and E. Hivon and P. Natoli and L. Pagano and S. Paradiso and Rubi{\~n}o-Martin, {J. A.} and A. Ach{\'u}carro and P. Ade and R. Allison and F. Arroja and M. Ashdown and M. Ballardini and Banday, {A. J.} and R. Banerji and N. Bartolo and Bartlett, {J. G.} and S. Basak and D. Baumann and {De Bernardis}, P. and M. Bersanelli and A. Bonaldi and M. Bonato and J. Borrill and F. Boulanger and M. Bucher and C. Burigana and A. Buzzelli and Cai, {Z. Y.} and M. Calvo and Carvalho, {C. S.} and G. Castellano",
year = "2018",
month = "4",
day = "5",
doi = "10.1088/1475-7516/2018/04/017",
language = "English",
volume = "2018",
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Exploring cosmic origins with CORE : Cosmological parameters. / CORE ; Clesse, S.

In: Journal of Cosmology and Astroparticle Physics, Vol. 2018, No. 4, 017, 05.04.2018.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Exploring cosmic origins with CORE

T2 - Cosmological parameters

AU - CORE

AU - Valentino, E. Di

AU - Brinckmann, T.

AU - Gerbino, M.

AU - Poulin, V.

AU - Bouchet, F. R.

AU - Lesgourgues, J.

AU - Melchiorri, A.

AU - Chluba, J.

AU - Clesse, S.

AU - Delabrouille, J.

AU - Dvorkin, C.

AU - Forastieri, F.

AU - Galli, S.

AU - Hooper, D. C.

AU - Lattanzi, M.

AU - Martins, C. J.A.P.

AU - Salvati, L.

AU - Cabass, G.

AU - Caputo, A.

AU - Giusarma, E.

AU - Hivon, E.

AU - Natoli, P.

AU - Pagano, L.

AU - Paradiso, S.

AU - Rubiño-Martin, J. A.

AU - Achúcarro, A.

AU - Ade, P.

AU - Allison, R.

AU - Arroja, F.

AU - Ashdown, M.

AU - Ballardini, M.

AU - Banday, A. J.

AU - Banerji, R.

AU - Bartolo, N.

AU - Bartlett, J. G.

AU - Basak, S.

AU - Baumann, D.

AU - De Bernardis, P.

AU - Bersanelli, M.

AU - Bonaldi, A.

AU - Bonato, M.

AU - Borrill, J.

AU - Boulanger, F.

AU - Bucher, M.

AU - Burigana, C.

AU - Buzzelli, A.

AU - Cai, Z. Y.

AU - Calvo, M.

AU - Carvalho, C. S.

AU - Castellano, G.

PY - 2018/4/5

Y1 - 2018/4/5

N2 - We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume ΛCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base ΛCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. In addition to assessing the improvement on the precision of individual parameters, we also forecast the post-CORE overall reduction of the allowed parameter space with figures of merit for various models increasing by as much as ∼ 107 as compared to Planck 2015, and 105 with respect to Planck 2015 + future BAO measurements.

AB - We forecast the main cosmological parameter constraints achievable with the CORE space mission which is dedicated to mapping the polarisation of the Cosmic Microwave Background (CMB). CORE was recently submitted in response to ESA's fifth call for medium-sized mission proposals (M5). Here we report the results from our pre-submission study of the impact of various instrumental options, in particular the telescope size and sensitivity level, and review the great, transformative potential of the mission as proposed. Specifically, we assess the impact on a broad range of fundamental parameters of our Universe as a function of the expected CMB characteristics, with other papers in the series focusing on controlling astrophysical and instrumental residual systematics. In this paper, we assume that only a few central CORE frequency channels are usable for our purpose, all others being devoted to the cleaning of astrophysical contaminants. On the theoretical side, we assume ΛCDM as our general framework and quantify the improvement provided by CORE over the current constraints from the Planck 2015 release. We also study the joint sensitivity of CORE and of future Baryon Acoustic Oscillation and Large Scale Structure experiments like DESI and Euclid. Specific constraints on the physics of inflation are presented in another paper of the series. In addition to the six parameters of the base ΛCDM, which describe the matter content of a spatially flat universe with adiabatic and scalar primordial fluctuations from inflation, we derive the precision achievable on parameters like those describing curvature, neutrino physics, extra light relics, primordial helium abundance, dark matter annihilation, recombination physics, variation of fundamental constants, dark energy, modified gravity, reionization and cosmic birefringence. In addition to assessing the improvement on the precision of individual parameters, we also forecast the post-CORE overall reduction of the allowed parameter space with figures of merit for various models increasing by as much as ∼ 107 as compared to Planck 2015, and 105 with respect to Planck 2015 + future BAO measurements.

KW - CMBR experiments

KW - cosmological parameters from CMBR

KW - neutrino masses from cosmology

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