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GR: Fachverband Gravitation und Relativitätstheorie

GR 10: Foundations and Alternatives II

GR 10.5: Talk

Wednesday, March 22, 2023, 17:20–17:40, ZEU/0255

Questionable predictions by EHT image of Sgr A* — •Jürgen Brandes — Karlsbad, Germany

The famous EHT image of Sgr A* predicts BH features in contradiction with observation: a*=0.9375 against a*=0.15; spin direction face-on against edge-on; accretion light variability arising with accretion disks against variability of accretion wind. And there is a theoretical shortcut by Broderick et al.: The missing UV bump agrees with degenerate supermassive objects being no BH. [1],[2]

[1] "Observations questioning classical GRT ...", chapter 13, homepage www.grt-li.de.

[2] J. Brandes, J. Czerniawski, L. Neidhart: Spezielle und Allgemeine Relativitätstheorie für Physiker und Philosophen - Einstein- und Lorentz-Interpretation, Paradoxien, Raum und Zeit, Experimente, 5th edition., VRI: 2022.