We show that a combined analysis of cosmic microwave background anisotropy power spectra obtained by the Planck satellite and luminosity distance data simultaneously excludes a flat universe and a cosmological constant at 99% confidence level. These results hold separately when combining Planck with three different data sets: the two determinations of the Hubble constant from Riess et al. and Freedman et al., and the Pantheon catalog of high-redshift Type Ia supernovae. We conclude that either the Lambda cold dark matter model needs to be replaced by a different paradigm, or else there are significant but still undetected systematics. Our result calls for new observations and stimulates the investigation of alternative theoretical models and solutions.

Investigating cosmic discordance / Valentino, E. D.; Melchiorri, A.; Silk, J.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 908:1(2021). [10.3847/2041-8213/abe1c4]

Investigating cosmic discordance

Melchiorri A.
;
2021

Abstract

We show that a combined analysis of cosmic microwave background anisotropy power spectra obtained by the Planck satellite and luminosity distance data simultaneously excludes a flat universe and a cosmological constant at 99% confidence level. These results hold separately when combining Planck with three different data sets: the two determinations of the Hubble constant from Riess et al. and Freedman et al., and the Pantheon catalog of high-redshift Type Ia supernovae. We conclude that either the Lambda cold dark matter model needs to be replaced by a different paradigm, or else there are significant but still undetected systematics. Our result calls for new observations and stimulates the investigation of alternative theoretical models and solutions.
2021
Closed universe (256); Cosmic background radiation (317); Cosmic microwave background radiation (322); Dark energy (351); Early universe (435); Hubble constant (758); Unified Astronomy Thesaurus concepts: Cosmological models (337)
01 Pubblicazione su rivista::01a Articolo in rivista
Investigating cosmic discordance / Valentino, E. D.; Melchiorri, A.; Silk, J.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 908:1(2021). [10.3847/2041-8213/abe1c4]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1619391
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