Publication
3-Form Cosmology: Phantom Behaviour, Singularities and Interactions
| dc.contributor.author | Morais, João | |
| dc.contributor.author | Bouhmadi Lopez, Mariam | |
| dc.contributor.author | Marto, João | |
| dc.date.accessioned | 2018-03-06T09:34:03Z | |
| dc.date.available | 2018-03-06T09:34:03Z | |
| dc.date.issued | 2017 | |
| dc.description.abstract | The latest cosmological observations by the Planck collaboration (and combined with others) are compatible with a phantom-like behaviour (w < − 1) for the dark energy equation of state that drives the current acceleration of the Universe. With this mindset, we look into models where dark energy is described by a 3-form field minimally coupled to gravity. When compared to a scalar field, these models have the advantage of more naturally accommodating a cosmological-constant and phantom-like behaviours. We show how the latter happens for a fairly general class of positive-valued potentials, and through a dynamical system approach, we find that in such cases the 3-form field leads the Universe into a Little Sibling of the Big Rip singular event into the future. In this work, we explore the possibility of avoiding such singularity via an interaction in the dark sector between cold dark matter and the 3-form field. For the kind of interactions considered, we deduce a condition for replacing the LSBR by a late time de Sitter phase. For specific examples of interactions that meet this condition, we look for distinctive imprints in the statefinder hierarchy { S 3 ( 1 ) ; S 4 ( 1 ) } , { S 3 ( 1 ) ; S 5 ( 1 ) } , and in the growth rate of matter, e ( z ) , through the composite null diagnostic (CND). | pt_PT |
| dc.description.sponsorship | 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 and JMorais wish to acknowledge the partial support from the Basque government Grant No. IT592-13 (Spain) and FONDOS FEDER under grant FIS2014-57956-P (Spanish government). J. Morais is also thankful to UPV/EHU for a PhD fellowship and UBI for hospitality during the completion of part of this work. The authors acknowledge the COST Action CA15117 (CANTATA). | |
| dc.description.version | info:eu-repo/semantics/publishedVersion | pt_PT |
| dc.identifier.doi | 10.3390/universe3010021 | pt_PT |
| dc.identifier.uri | http://hdl.handle.net/10400.6/4610 | |
| dc.language.iso | eng | pt_PT |
| dc.peerreviewed | yes | pt_PT |
| dc.publisher | MDPI | pt_PT |
| dc.relation | What is the hand that rocks the "cradle” of the accelerating universe? | |
| dc.relation.publisherversion | http://www.mdpi.com/2218-1997/3/1/21 | pt_PT |
| dc.subject | Dark energy 3-forms | pt_PT |
| dc.subject | DM-DE interaction | pt_PT |
| dc.subject | Dark energy 3-forms | pt_PT |
| dc.subject | Future singularities | pt_PT |
| dc.subject | Cosmography | pt_PT |
| dc.subject | Statefinders approach | pt_PT |
| dc.subject | Growth rate | pt_PT |
| dc.subject | Dynamical systems | pt_PT |
| dc.title | 3-Form Cosmology: Phantom Behaviour, Singularities and Interactions | pt_PT |
| dc.type | journal article | |
| dspace.entity.type | Publication | |
| oaire.awardTitle | What is the hand that rocks the "cradle” of the accelerating universe? | |
| oaire.awardURI | info:eu-repo/grantAgreement/FCT/Investigador FCT/IF%2F01442%2F2013%2FCP1196%2FCT0001/PT | |
| oaire.citation.issue | 1 | pt_PT |
| oaire.citation.startPage | 21 | pt_PT |
| oaire.citation.volume | 3 | pt_PT |
| oaire.fundingStream | Investigador FCT | |
| person.familyName | Morais | |
| person.familyName | Bouhmadi Lopez | |
| person.familyName | Pedro de Jesus Marto | |
| person.givenName | João | |
| person.givenName | Mariam | |
| person.givenName | João | |
| person.identifier.ciencia-id | CF1F-8611-C989 | |
| person.identifier.ciencia-id | 2F16-67B1-A930 | |
| person.identifier.orcid | 0000-0001-5090-8015 | |
| person.identifier.orcid | 0000-0002-1529-1889 | |
| person.identifier.orcid | 0000-0003-3974-9177 | |
| person.identifier.scopus-author-id | 55756497200 | |
| person.identifier.scopus-author-id | 6508339470 | |
| project.funder.identifier | http://doi.org/10.13039/501100001871 | |
| project.funder.name | Fundação para a Ciência e a Tecnologia | |
| rcaap.rights | openAccess | pt_PT |
| rcaap.type | article | pt_PT |
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