Cosmological Fluctuations in Delta Gravity

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dc.catalogadorjca
dc.contributor.authorAlfaro Solís, Jorge Luis
dc.contributor.authorRubio, Carlos
dc.contributor.authorSan Martín, Marco
dc.date.accessioned2023-07-11T15:13:35Z
dc.date.available2023-07-11T15:13:35Z
dc.date.issued2023
dc.description.abstractAbout 70% of the Universe is Dark Energy, but the physics community still does not know what it is. Delta gravity (DG) is an alternative theory of gravitation that could solve this cosmological problem. Previously, we studied the Universe’s accelerated expansion, where DG was able to explain the SNe-Ia data successfully. In this work, we computed the cosmological fluctuations in DG that give rise to the CMB through a hydrodynamic approximation. We calculated the gauge transformations for the metric and the perfect fluid to present the equations of the evolution of cosmological fluctuations. This provided the necessary equations to solve the scalar TT power spectrum in a semi-analytical way. These equations are useful for comparing the DG theory with astronomical observations and thus being able to constrain the DG cosmology.
dc.fechaingreso.objetodigital2023-07-11
dc.fuente.origenORCID
dc.identifier.doi10.3390/universe9070315
dc.identifier.issn0193-9785
dc.identifier.urihttps://doi.org/10.3390/universe9070315
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/74162
dc.information.autorucInstituto de Física; Alfaro Solís, Jorge Luis; 0000-0002-2091-1325; 49962
dc.issue.numero7
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final41
dc.pagina.inicio1
dc.revistaUniverse
dc.rightsacceso abierto
dc.subjectCosmology
dc.subjectModified gravity
dc.subjectCosmic microwave background
dc.subjectCosmological perturbations
dc.subjectDark energy
dc.subject.ddc520
dc.subject.deweyAstronomíaes_ES
dc.titleCosmological Fluctuations in Delta Gravity
dc.typeartículo
dc.volumen9
sipa.codpersvinculados49962
sipa.trazabilidadORCID;2023-07-10
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