New Models Challenge Standard Cosmology Paradigms

New models are emerging that challenge the standard cosmological paradigms, particularly regarding dark matter and dark energy. A recent paper titled 'Bose-Einstein Condensate dark matter with logarithmic nonlinearity,' submitted to ArXiv, suggests that if dark matter consists of massive bosons, it could form a self-gravitating condensate during cosmological evolution.

The authors propose a logarithmic form for the self-interacting potential of this condensate and find that their model aligns well with galactic rotation curves derived from the Spitzer Photometry and Accurate Rotation Curves data.

Meanwhile, another study titled 'Interacting dark energy after DESI DR2: a challenge for ΛCDM paradigm?' explores a model of interacting dark energy, analyzing data from multiple sources including the Cosmic Microwave Background and Supernova Type Ia datasets.

This research indicates a mild preference for interaction over the traditional ΛCDM model, though results remain inconclusive, suggesting a mixed view on the viability of interacting dark energy. These studies highlight ongoing efforts to refine our understanding of the universe's expansion and structure, potentially reshaping the cosmic narrative.