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Title:
Cosmological future singularities in interacting dark energy models
Authors:
Jiménez, Jose Beltrán; Rubiera-Garcia, Diego; Sáez-Gómez, Diego; Salzano, Vincenzo
Affiliation:
AA(Aix Marseille Univ, Université de Toulon, CNRS, CPT, Marseille 13288, France), AB(Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016 Lisbon, Portugal), AC(Instituto de Astrofísica e Ciências do Espaço, Faculdade de Ciências da Universidade de Lisboa, Edifício C8, Campo Grande, P-1749-016 Lisbon, Portugal; Institut de Ciències de l'Espai, ICE/CSIC-IEEC, Campus UAB, Carrer de Can Magrans s/n, 08193 Bellaterra (Barcelona), Spain), AD(Institute of Physics, University of Szczecin, Wielkopolska 15, 70-451 Szczecin, Poland)
Publication:
Physical Review D, Volume 94, Issue 12, id.123520 (PhRvD Homepage)
Publication Date:
12/2016
Origin:
APS
Abstract Copyright:
2016: American Physical Society
DOI:
10.1103/PhysRevD.94.123520
Bibliographic Code:
2016PhRvD..94l3520J

Abstract

The existence of interactions between dark matter and dark energy has been widely studied, since they can fit well the observational data and may provide new physics through such an interaction. In this work, we analyze these models and investigate their potential relation with future cosmological singularities. We find that every future singularity found in the literature can be mapped into a singularity of the interaction term, that we call the Q singularity, where the energy flow between the dark components diverges. Furthermore, this framework allows us to identify a new type of future singularity induced by the divergence of the first derivative of the dark energy equation of state parameter.
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