A unified dark energy model with sigmoid correction generates a spectrum of rip futures that all fit DESI, Pantheon+, and CMB data at the same level as ΛCDM.
On the other hand, at late times we find: ρ(a)≃3H 2 0 η1/na−3|α|,(21) which scales as a quintessence fluid with constant equation-of-state parameterw≃ −1+|α|
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A Spectrum of Cosmological Rips and Their Observational Signatures
A unified dark energy model with sigmoid correction generates a spectrum of rip futures that all fit DESI, Pantheon+, and CMB data at the same level as ΛCDM.