Mostrar el registro sencillo del ítem
dc.contributor.author
Piccirilli, María Pía
dc.contributor.author
Leon Garcia, Gabriel
dc.date.available
2023-12-15T10:39:09Z
dc.date.issued
2023-07
dc.identifier.citation
Piccirilli, María Pía; Leon Garcia, Gabriel; Reconstruction of inflationary scenarios in non-conservative unimodular gravity; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 524; 3; 7-2023; 4024-4036
dc.identifier.issn
0035-8711
dc.identifier.uri
http://hdl.handle.net/11336/220395
dc.description.abstract
Unimodular gravity is an alternative theory of gravity to general relativity. The gravitational field equations are given by the trace-free version of Einstein’s field equations. Due to the structure of the theory, unimodular gravity admits a diffusion term that characterizes a possible non-conservation of the canonical energy-momentum tensor locally. Employing this feature of unimodular gravity, in the present work, we explicitly show how to construct an inflationary phase that can be contrasted with current observations. In particular, we focus on three different inflationary scenarios of physical interest. An important element in these scenarios is that the accelerated expansion is driven by the diffusion term exclusively, i.e. there is no inflaton. Furthermore, the primordial spectrum during inflation is generated by considering inhomogeneous perturbations associated to standard hydrodynamical matter (modeled as a single ultra-relativistic fluid). For each of the scenarios, we obtain the prediction for the primordial spectrum and contrast it with recent observational bounds.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
(COSMOLOGY:) COSMIC MICROWAVE BACKGROUND
dc.subject
(COSMOLOGY:) COSMOLOGICAL PARAMETERS
dc.subject
(COSMOLOGY:) EARLY UNIVERSE
dc.subject
(COSMOLOGY:) INFLATION
dc.subject
(COSMOLOGY:) OBSERVATIONS
dc.subject
(COSMOLOGY:) THEORY
dc.subject.classification
Astronomía
dc.subject.classification
Ciencias Físicas
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Reconstruction of inflationary scenarios in non-conservative unimodular gravity
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-12-14T13:16:22Z
dc.journal.volume
524
dc.journal.number
3
dc.journal.pagination
4024-4036
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Piccirilli, María Pía. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.description.fil
Fil: Leon Garcia, Gabriel. Universidad Nacional de La Plata. Facultad de Ciencias Astronómicas y Geofísicas. Área Física Teórica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.journal.title
Monthly Notices of the Royal Astronomical Society
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stad2095/7223472
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1093/mnras/stad2095
Archivos asociados