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GR: Fachverband Gravitation und Relativitätstheorie
GR 10: Foundations and Alternatives II
GR 10.4: Talk
Wednesday, March 22, 2023, 17:00–17:20, ZEU/0255
Comparison of Models of the H0 Tension — •Philipp Schöneberg1, Phil Immanuel Gustke1, and Hans-Otto Carmesin1,2,3 — 1Gymn. Athenaeum, Harsefelder Str. 40, 21680 Stade — 2Studienseminar Stade, Bahnhofstr. 5, 21682 Stade — 3Universität Bremen, Fachbereich 1, Postfach 330440, 28334 Bremen
While Newton proposed a static and flat space, Einstein used his general relativity, GR, and derived a possible dynamic expansion of space [1]. Hubble observed that expansion [2]. The dynamics of that expansion can be described by the Hubble parameter, and by its present-day limit H0. However, the observed value at the early universe H0,obs,early differs from the observed value at the late universe H0,obs,late by five standard deviations [3]. So, what is the origin of that H0 difference or H0 tension? Here, we summarize proposed models of that H0 difference, and we compare these models according to criteria of physics and epistemology [4].
[1] Einstein, A. (1917): Kosmologische Betrachtungen zur allgemeinen Relativitätstheorie. Sitzungsb. d. Königl. Preuß. Akad. d. Wiss., pp. 142-152. [2] Hubble, E. (1929): A relation between distance and radial velocity among extra-galactic nebulae. Proc. of National Acad. of Sciences, 15, pp. 168-173. [3] Riess, A. et al. (2022): A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s−1 Mpc−1 Uncertainty from the Hubble Space Telescope and the SHOES Team. The Astrophys. J. Lett., 934:L7, pp. 1 - 52. [4] Humphreys, P. (2004): Scientific Knowledge. In: Niiniluoto, Ilkaa et al. (Eds.): Handbook of Epistemology. Dordrecht: Springer, pp. 549-569.