Speaker
Description
We study the observational signature of non-gravitational interaction between
the dark components of the cosmic fluids. We explore a phenomenological models
of interacting dark energy and dark matter, characterised by a linear and non-linear
coupling term Q. These form of interactions naturally interpolates between linear
regimes at early and late times, while avoiding divergences in the energy exchange
term. We derive the background cosmological evolution equations and analyse
the impact of the interaction on key observables. Using recent observational data sets including Cosmic Chronometer, Type Ia supernovae(Pantheon Plus &SH0ES), and DESI-BAO datasets, we constrain the interaction parameter and assess
the model’s potential to alleviate cosmological tensions.
| Stream | Science or Engineering |
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