Sá, Paulo2025-01-162025-01-162024-08-102218-1997http://hdl.handle.net/10400.1/26631We investigate a coupled quintessence cosmological model in which a dark-energy scalar field with an exponential potential interacts directly with a dark-matter fluid through a dissipa tive term inspired by warm inflation. The evolution equations of this model give rise to a three dimensional dynamical system for which a thorough qualitative analysis is performed for all values of the relevant parameters. We find that the model is able to replicate the observed sequence of late-time cosmological eras, namely, a long enough matter-dominated era followed by a present era of accelerated expansion. In situations where there is a significant transfer of energy from dark energy to dark matter, temporary scaling-type solutions may arise, but, asymptotically, all solutions are dominated by dark energy.engCoupled quintessenceDark energyDark matterCosmologyjournal article10.3390/universe10080324