The Universe Whispers: [tag:dark_energy]dark energy[/tag] is not alone ⚡ экспресс
Deviations in baryon acoustic oscillation (BAO) data from the DESI survey relative to standard ΛCDM cosmology are usually interpreted as signs of dynamical dark energy (DE). It is shown that models with interacting dark matter and dark energy (IDE) — coupled quintessence and coupled fluid — explain these deviations no worse, and by several criteria better, without introducing a variable equation of state for DE. A joint analysis of the latest CMB data (Planck, ACT, SPT), DESI BAO, and supernovae (including the DES-Dovekie recalibration) reveals reliable evidence for non-zero interaction at the 3–5σ level; marginalized interaction parameters significantly differ from the null ΛCDM limit. The result is robust to the DES-Dovekie supernova recalibration, which weakens the case for dynamical DE. With an equal number of free parameters, IDE models match the CPL parametrization in describing low- and high-redshift data. The work establishes IDE as a physically motivated alternative and highlights the need for future measurements of perturbations (weak lensing, galaxy clustering) to distinguish between paradigms.
The Universe is expanding faster and faster. We used to chalk that up to dark energy — a mysterious force working alone. But the latest measurements seem to have eavesdropped on a private conversation: it appears dark energy is not silent but whispering back and forth with dark matter.
By comparing how galaxies flew apart in different epochs, scientists realized: models where dark matter and energy exchange signals explain the data just as well as the idea of a capricious dark energy. There was no need to invent new particles. It’s enough to acknowledge: the two dark riddles are having a dialogue.
If that's the case, their 'conversation' leaves a trace. Future sky maps — for example, from the Euclid telescope — will be able to see this whisper in the way galaxy clusters bunch together. It’s as if the cosmos leaves writings we are only beginning to read.
🎯 If [tag:dark_energy]dark energy[/tag] and [tag:dark_matter]dark matter[/tag] really are communicating, then the Euclid telescope will be able to eavesdrop on their conversation in the pattern of galaxy clusters — a cosmic sign language, understandable without words.