Скачать или смотреть CosmoVerseWorkshop@Naples: Oliver Fabio Piatella: Varying equation of state and matter

These talks are from our CosmoVerseWorkshop@Naples that took place on 21-23 May 2025 at the Scuola Superiore Meridionale in Naples. For more details about the event, visit: https://cosmoversetensions.eu/event/c...

CMB

Oliver Fabio Piatella

Varying equation of state and matter

Dust is pressureless matter, a key ingredient of the cosmological recipe, effectively describing, at present, about one third of the whole content of the universe. On the other hand, dust at early times, before recombination, is substantially different from dust at late times, when structures are formed and the universe becomes highly inhomogeneous at small scales. We show that such a difference induces, via a backreaction mechanism, a small change in the equation of state of dust, which effectively gains a small positive pressure. We show that such modification can ease the tensions in determining the Hubble constant and the clustering parameter S8 without the need to introduce additional degrees of freedom.

Visit our website: https://cosmoversetensions.eu
Like our socials:
Twitter:   / cacosmoverse  
Linked-in:   / cacosmoverse  
Facebook:   / cacosmoverse