Consequences of dark matter-dark energy interaction on cosmological parameters derived from type Ia supernova data

• Verfasst von: Amendola, Luca [VerfasserIn]
• Verfasst von: Campos, Gabriela C. [VerfasserIn]
• Verfasst von: Rosenfeld, Rogerio [VerfasserIn]
• Titel: Consequences of dark matter-dark energy interaction on cosmological parameters derived from type Ia supernova data
• Verf.angabe: Luca Amendola, INAF/Osservatorio Astronomico di Roma, V. Frascati 33, 00040, Monteporzio Catone (Roma), Italy, Gabriela Camargo Campos and Rogerio Rosenfeld, Instituto de Física Teórica - UNESP, Rua Pamplona 145, 01405-900, São Paulo, SP, Brazil
• Fussnoten: Gesehen am 15.11.2017
• Titel Quelle: Enthalten in: Physical review / D
• Jahr Quelle: 2007
• Band/Heft Quelle: 75(2007,8) Artikel-Nummer 083506, 7 Seiten
• ISSN Quelle: 1550-2368
• ISSN Quelle: 1089-4918
• DOI: doi:10.1103/PhysRevD.75.083506
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1565366077

Abstract

Models where the dark matter component of the Universe interacts with the dark energy field have been proposed as a solution to the cosmic coincidence problem, since in the attractor regime both dark energy and dark matter scale in the same way. In these models the mass of the cold dark matter particles is a function of the dark energy field responsible for the present acceleration of the Universe, and different scenarios can be parametrized by how the mass of the cold dark matter particles evolves with time. In this article we study the impact of a constant coupling δ between dark energy and dark matter on the determination of a redshift dependent dark energy equation of state wDE(z) and on the dark matter density today from SNIa data. We derive an analytical expression for the luminosity distance in this case. In particular, we show that the presence of such a coupling increases the tension between the cosmic microwave background data from the analysis of the shift parameter in models with constant wDE and SNIa data for realistic values of the present dark matter density fraction. Thus, an independent measurement of the present dark matter density can place constraints on models with interacting dark energy.