A momentum coupling between dark matter and dark energy : consequences at small scales

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dc.contributor.advisorCandlish, Graeme
dc.contributor.authorPalma Palma, Daniela
dc.date.accessioned2023-12-06T13:58:43Z
dc.date.available2023-12-06T13:58:43Z
dc.date.issued2021-05
dc.description.abstractDark energy is frequently modelled as an additional dynamical scalar field component in the Universe, referred to as “quintessence,” which drives the late-time acceleration. Furthermore, the quintessence field may be coupled to dark matter and/or baryons, leading to a fifth force. In this thesis we explore the consequences for non-linear cosmological structure formation arising from a momentum coupling between the quintessence field and dark matter. The coupling leads to a modified Euler equation, which we implement in an N-body cosmological simulation. We then analyse the non- linear power spectrum, comparing with the standard ΛCDM cosmology, as well as the halo mass function, and various other dark matter halo properties. We find that, for certain quintessence potentials, a positive coupling leads to a large enhancement of structure formation at small scales.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.identifier.citationPalma, D. (2021). A momentum coupling between dark matter and dark energy : consequences at small scales (Tesis de postgrado). Universidad de Valparaíso, Valparaíso, Chile.en_ES
dc.identifier.urihttps://repositoriobibliotecas.uv.cl/handle/uvscl/13448
dc.language.isoenen_ES
dc.publisherUniversidad de Valparaísoen_ES
dc.subjectENERGIA OSCURA (ASTRONOMIA)en_ES
dc.subjectHALOS GALACTICOSen_ES
dc.titleA momentum coupling between dark matter and dark energy : consequences at small scalesen_ES
dc.typeTesisen_ES
uv.catalogadorPJR CIENen_ES
uv.departamentoInstituto de Fisica y Astronomiaen_ES
uv.notageneralMagíster en Astrofísicaen_ES

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Tesis postgrado Astrofísica