TL;DR
This paper proposes that the size evolution of massive compact galaxies can be explained by dark matter in Bose-Einstein condensate, predicting galaxy sizes grow with the universe's expansion without mergers.
Contribution
It introduces a novel model linking dark matter Bose-Einstein condensate properties to galaxy size evolution, aligning with recent observations.
Findings
Galaxy sizes increase with the Hubble radius
Size evolution explained without galaxy mergers
Model matches recent observational data
Abstract
It is suggested that the recently observed size evolution of very massive compact galaxies in the early universe can be explained, if dark matter is in Bose Einstein condensate. In this model the size of the dark matter halos and galaxies depends on the correlation length of dark matter and, hence, on the the expansion of the universe. This theory predicts that the size of the galaxies increases as the Hubble radius of the universe even without merging, which agrees well with the recent observational data.
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