A preliminary analysis of the energy transfer between the dark sectors of the Universe

TL;DR

This paper investigates the interaction between dark matter and dark energy using thermodynamics and supernova data, finding that dark matter temperature aligns with sterile neutrino estimates.

Contribution

It introduces an extended thermodynamics approach to analyze dark sector interactions and constrains these interactions with observational data.

Findings

Dark matter temperature matches sterile neutrino estimates

Dark sector interaction constraints derived from supernova data

Extended thermodynamics effectively models dark sector energy transfer

Abstract

We study the mutual interaction between the dark sectors (dark matter and dark energy) of the Universe by resorting to the extended thermodynamics of irreversible processes and constrain the former with supernova type Ia data. As a byproduct, the present dark matter temperature results in good agreement with independent estimates of the temperature of the gas of sterile neutrinos.