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dc.contributor.author
Chimento, Luis Pascual  
dc.contributor.author
Forte, Mónica  
dc.date.available
2019-04-04T17:26:36Z  
dc.date.issued
2006-03  
dc.identifier.citation
Chimento, Luis Pascual; Forte, Mónica; Anisotropic k-essence cosmologies; American Physical Society; Physical Review D: Particles, Fields, Gravitation and Cosmology; 73; 6; 3-2006; 1-9  
dc.identifier.issn
1550-7998  
dc.identifier.uri
http://hdl.handle.net/11336/73168  
dc.description.abstract
We investigate a Bianchi type-I cosmology with k-essence and find the set of models which dissipate the initial anisotropy. There are cosmological models with extended tachyon fields and k-essence having a constant barotropic index. We obtain the conditions leading to a regular bounce of the average geometry and the residual anisotropy on the bounce. For constant potential, we develop purely kinetic k-essence models which are dust dominated in their early stages, dissipate the initial anisotropy, and end in a stable de Sitter accelerated expansion scenario. We show that linear k-field and polynomial kinetic function models evolve asymptotically to Friedmann-Robertson-Walker cosmologies. The linear case is compatible with an asymptotic potential interpolating between Vl -γl, in the shear dominated regime, and Vl -2 at late time. In the polynomial case, the general solution contains cosmological models with an oscillatory average geometry. For linear k-essence, we find the general solution in the Bianchi type-I cosmology when the k field is driven by an inverse square potential. This model shares the same geometry as a quintessence field driven by an exponential potential. © 2006 The American Physical Society.  
dc.format
application/pdf  
dc.language.iso
eng  
dc.publisher
American Physical Society  
dc.rights
info:eu-repo/semantics/openAccess  
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/  
dc.subject
K-Essence  
dc.subject
Bianchi  
dc.subject.classification
Astronomía  
dc.subject.classification
Ciencias Físicas  
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS  
dc.title
Anisotropic k-essence cosmologies  
dc.type
info:eu-repo/semantics/article  
dc.type
info:ar-repo/semantics/artículo  
dc.type
info:eu-repo/semantics/publishedVersion  
dc.date.updated
2019-03-27T18:03:00Z  
dc.journal.volume
73  
dc.journal.number
6  
dc.journal.pagination
1-9  
dc.journal.pais
Estados Unidos  
dc.journal.ciudad
Nueva York  
dc.description.fil
Fil: Chimento, Luis Pascual. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina  
dc.description.fil
Fil: Forte, Mónica. Facultad de Ciencias Exactas y Naturales; Argentina  
dc.journal.title
Physical Review D: Particles, Fields, Gravitation and Cosmology  
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1103/PhysRevD.73.063502