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Multipoles in the Hubble and deceleration parameters: what does the theory has to say about it?

Jessica Santiago
Aristotle University of Thessaloniki

Given the exponential growth on the upcoming supernovae data available, the possibilities of rigorously testing the cosmological principle becomes ever more real. One of the ways to do so, is by measuring the multipole decomposition of the Hubble and deceleration parameters.
In this talk, I will show how those can be easily explained theoretically in a model independent way.
Following, I discuss the effects which arise from our relative motion with respect to the dust galaxy fluid. Apart from inducing a change in the multiples, this relative velocity also imposes constraints on the distance definition used for analysing boosted data - more precisely, I will show that a corrected luminosity distance must be used for such cases.

2023 June 06, 14:30

Faculdade de Ciências da Universidade de Lisboa (C8.2.19)
Campo Grande, 1749-016 Lisboa

Faculdade de Ciências da Universidade de Lisboa Universidade do Porto Faculdade de Ciências e Tecnologia da Universidade de Coimbra
Fundação para a Ciência e a Tecnologia COMPETE 2020 PORTUGAL 2020 União Europeia