Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
In: Classical and Quantum Gravity Classical and Quantum Gravity, IOP Publishing, 2021, 38 (18), pp.184001. ⟨10.1088/1361-6382/ac1a81⟩; (2021-05-20)
Online
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Zugriff:
The tension between early and late Universe probes of the Hubble constant has motivated various new FLRW cosmologies. Here, we reanalyse the Hubble tension with a recent age of the Universe constraint. This allows us to restrict attention to matter and a dark energy sector that we treat without assuming a specific model. Assuming analyticity of the Hubble parameter $H(z)$, and a generic low redshift modification to flat $\Lambda$CDM, we find that low redshift data ($z \lesssim 2.5$) and well-motivated priors only permit a dark energy sector close to the cosmological constant $\Lambda$. This restriction rules out late Universe modifications within FLRW. We show that early Universe physics that alters the sound horizon can yield an upper limit of $H_0 \sim 71 \pm 1$ km/s/Mpc. Since various local determinations may be converging to $H_0 \sim 73$ km/s/Mpc, a breakdown of the FLRW framework is a plausible resolution. We outline how future data, in particular strongly lensed quasar data, could also provide further confirmations of such a resolution.
Comment: v1 10 pages, comments welcome, especially on appendix D & Figure 4; v2, typos corrected, Figure 4 improved, observations strengthened; v3 references added, matches version published as invited contribution to CQG "Focus Issue on the Hubble Constant Tension"
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Does Hubble Tension Signal a Breakdown in FLRW Cosmology?
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Autor/in / Beteiligte Person: | Sheikh-Jabbari, Mohammad M. ; Eoin Ó Colgáin ; Yin, Lu ; Mohayaee, Roya ; Krishnan, Chethan ; Institut d'Astrophysique de Paris (IAP) ; Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
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Quelle: | Classical and Quantum Gravity Classical and Quantum Gravity, IOP Publishing, 2021, 38 (18), pp.184001. ⟨10.1088/1361-6382/ac1a81⟩; (2021-05-20) |
Veröffentlichung: | 2021 |
Medientyp: | unknown |
ISSN: | 0264-9381 (print) ; 1361-6382 (print) |
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