Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers

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dc.contributor.authorLeanizbarrutia, Iker
dc.contributor.authorSáez-Gómez, Diego
dc.date.accessioned2021-10-08T07:11:33Z
dc.date.available2021-10-08T07:11:33Z
dc.date.issued2014
dc.description.abstractThe properties of some particular parametrizations of the dark energy Equation of State (EoS) are studied by using Supernovae Ia data (HST Cluster Supernova Survey) combined with Standard Ruler datasets (Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)). In this sense, we propose some parametrizations that may present a (fast) transition to a phantom dark energy EoS (where $w_{DE}<-1$) and compare the results with the $Lambda$CDM model. The best fit of the models is obtained by using Sne Ia and Standard Ruler datasets, which provides some information about whether the phantom transition may be supported by the observations. In this regard, the crossing of the phantom barrier is allowed statistically but the occurrence of a future singularity seems unlikely. Furthermore, the reconstruction of a (non-)canonical scalar field Lagrangian from the EoS parameter is studied, where shown that EoS parametrizations can be well reconstructed in terms of scalar fields.
dc.identifier.apacitationLeanizbarrutia, I., & Sáez-Gómez, D. (2014). Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers. <i>Physical Review D - Particles, Fields, Gravitation, and Cosmology</i>, 90(6), 174 - 177. http://hdl.handle.net/11427/34638en_ZA
dc.identifier.chicagocitationLeanizbarrutia, Iker, and Diego Sáez-Gómez "Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers." <i>Physical Review D - Particles, Fields, Gravitation, and Cosmology</i> 90, 6. (2014): 174 - 177. http://hdl.handle.net/11427/34638en_ZA
dc.identifier.citationLeanizbarrutia, I. & Sáez-Gómez, D. 2014. Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers. <i>Physical Review D - Particles, Fields, Gravitation, and Cosmology.</i> 90(6):174 - 177. http://hdl.handle.net/11427/34638en_ZA
dc.identifier.issn1550-2368
dc.identifier.issn1550-7998
dc.identifier.ris TY - Journal Article AU - Leanizbarrutia, Iker AU - Sáez-Gómez, Diego AB - The properties of some particular parametrizations of the dark energy Equation of State (EoS) are studied by using Supernovae Ia data (HST Cluster Supernova Survey) combined with Standard Ruler datasets (Cosmic Microwave Background (CMB) and Baryon Acoustic Oscillations (BAO)). In this sense, we propose some parametrizations that may present a (fast) transition to a phantom dark energy EoS (where $w_{DE}<-1$) and compare the results with the $Lambda$CDM model. The best fit of the models is obtained by using Sne Ia and Standard Ruler datasets, which provides some information about whether the phantom transition may be supported by the observations. In this regard, the crossing of the phantom barrier is allowed statistically but the occurrence of a future singularity seems unlikely. Furthermore, the reconstruction of a (non-)canonical scalar field Lagrangian from the EoS parameter is studied, where shown that EoS parametrizations can be well reconstructed in terms of scalar fields. DA - 2014 DB - OpenUCT DP - University of Cape Town IS - 6 J1 - Physical Review D - Particles, Fields, Gravitation, and Cosmology LK - https://open.uct.ac.za PY - 2014 SM - 1550-2368 SM - 1550-7998 T1 - Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers TI - Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers UR - http://hdl.handle.net/11427/34638 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/34638
dc.identifier.vancouvercitationLeanizbarrutia I, Sáez-Gómez D. Parametrizing the transition to the phantom epoch with supernovae Ia and standard rulers. Physical Review D - Particles, Fields, Gravitation, and Cosmology. 2014;90(6):174 - 177. http://hdl.handle.net/11427/34638.en_ZA
dc.language.isoeng
dc.publisher.departmentDepartment of Mathematics and Applied Mathematics
dc.publisher.facultyFaculty of Science
dc.sourcePhysical Review D - Particles, Fields, Gravitation, and Cosmology
dc.source.journalissue6
dc.source.journalvolume90
dc.source.pagination174 - 177
dc.source.urihttps://dx.doi.org/10.1103/PhysRevD.90.063508
dc.subject.otherAstrophysics - Cosmology and Nongalactic Astrophysics
dc.subject.otherGeneral Relativity and Quantum Cosmology
dc.titleParametrizing the transition to the phantom epoch with supernovae Ia and standard rulers
dc.typeJournal Article
uct.type.publicationResearch
uct.type.resourceJournal Article
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