Relativity and Cosmology

    

The Role of the Hubble Sphere for the Reversal of the Recession Behaviour of Galaxies and Photons in the Standard Model of Cosmology (Lambda-CDM Model)

Authors: Werner Lange

When do galaxies modelled as comoving objects move away from the observer at speeds below or above the speed of light? And when and how can galaxies break through the below-above barrier? When do photons directed towards the observer move away from the observer? And why can photons directed towards the observer, which once travelled away from the observer at a large multiple of the speed of light, still reach the observer in the end? Two points in time are decisive, namely for galaxies globally (independent of light cones) the time of the transition from decelerated to accelerated expansion, and for photons (in addition to the extent of the deceleration of the recession in the early universe up to the transition time) per light cone apex the intersection between the surfaces of light cone and Hubble sphere.

Comments: 35 Pages. In German

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Submission history

[v1] 2025-04-21 19:30:18
[v2] 2025-06-03 23:49:09
[v3] 2026-01-20 22:13:50

Unique-IP document downloads: 200 times

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