Publicación: DYNAMICS AND STATEFINDER ANALYSIS OF A CLASS OF SIGN-CHANGEABLE INTERACTING DARK ENERGY SCENARIOS
Fecha
2022
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EUROPEAN PHYSICAL JOURNAL C
Resumen
WE REVISE THE DYNAMICAL PROPERTIES OF A CLASS OF
COSMOLOGICAL MODELS WHERE THE DARK SECTOR INTERACTS THROUGH AN INTERACTING TERM THAT CHANGES SIGN DURING EVOLUTION. IN PARTICULAR, WE OBTAIN THE CRITICAL POINTS AND INVESTIGATE THE EXISTENCE AND STABILITY CONDITIONS FOR COSMOLOGICAL SOLUTIONS, DESCRIBING RADIATION, MATTER AND DARK ENERGY DOMINATED ERAS.
WE FIND THAT ALL THE STUDIED MODELS ADMIT A STABLE CRITICAL POINT
CORRESPONDING TO AN ACCELERATED PHASE. WE USE BACKGROUND
DATA TO FIND THE BEST FIT PARAMETERS FOR ONE OF THE STUDIED MOD-
ELS, RESULTING IN AN INTERACTING PARAMETER WITH A DEFINITE SIGN
WITHIN THE 1? CONFIDENCE LEVEL, CONSISTENT WITH THE RESULTS OF
THE DYNAMICAL SYSTEM ANALYSIS. WE COMPUTE THE STATEFINDER
PARAMETERS AND PLOT THE R - Q AND R - S PLANES, WHERE WE
OBSERVE DIFFERENT EVOLUTIONARY TRAJECTORIES FOR THE INTERACTING
SCENARIOS, ALLOWING IN THIS SENSE TO DISCRIMINATE AMONG DARK
ENERGY MODELS.
