Interacting 3-form dark energy models: distinguishing interactions and avoiding the Little Sibling of the Big Rip
2017
Online
academicJournal
Zugriff:
In this paper we consider 3-form dark energy (DE) models with interactions in the dark sector. We aim to distinguish the phenomenological interactions that are defined through the dark matter (DM) and the DE energy densities. We do our analysis mainly in two stages. In the first stage, we identify the non-interacting 3-form DE model which generically leads to an abrupt late-time cosmological event which is known as the little sibling of the Big Rip (LSBR). We classify the interactions which can possibly avoid this late-time abrupt event. We also study the parameter space of the model that is consistent with the interaction between DM and DE energy densities at present as indicated by recent studies based on BAO and SDSS data. In the later stage, we observationally distinguish those interactions using the statefinder hierarchy parameters {S3(1),S4 (1)},{S3 (1),S5 (1)} . We also compute the growth factor parameter ε(z) for the various interactions we consider herein and use the composite null diagnostic (CND) {S3(1), ε(z)} as a tool to characterise those interactions by measuring their departures from the concordance model. In addition, we make a preliminary analysis of our model in light of the recently released data by SDSS~III on the measurement of the linear growth rate of structure.
The work of MBL is supported by the Portuguese Agency “Fundação para a Ciência e Tecnologia” through an Investigador FCT Research contract, with reference IF/01442/2013/ CP1196/CT0001. She also wishes to acknowledge the partial support from the Basque government Grant No. IT592-13 (Spain) and FONDOS FEDER under grant FIS2014-57956-P (Spanish government). JMorais is thankful to UPV/EHU for a PhD fellowship and UBI for hospitality during the completion of part of this work and acknowledges the support from the Basque government Grant No. IT592-13 (Spain) and FONDOS FEDER under grant FIS2014-57956-P (Spanish Government). SK acknowledges for the support of grant SFRH/BD/51980/2012 from Portuguese “Fundação para a Ciência e Tecnologia”and is thankful to the hospitality of University of Basque country where part of this work was carried out. YT wishes to acknowledge the financial support from INEF (Iran). He also thanks the Brazilian agencies CAPES and FAPES for partial financial support. This research work is supported by the grant UID/MAT/00212/2013. The authors acknowledge the COST Action CA15117 (CANTATA).
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Interacting 3-form dark energy models: distinguishing interactions and avoiding the Little Sibling of the Big Rip
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Autor/in / Beteiligte Person: | Morais, João ; Bouhmadi Lopez, Mariam ; Kumar, K. Sravan ; Marto, João ; Tavakoli, Yaser ; uBibliorum |
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Veröffentlichung: | 2017 |
Medientyp: | academicJournal |
DOI: | 10.1016/j.dark.2016.11.002 |
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