Seminário com Dr. Omar Roldán – 22 de outubro de 2021 (sexta-feira) – 10h15min
O PROGRAMA DE PÓS-GRADUAÇÃO EM FÍSICA convida para o seminário:
Aberration and Doppler effect on the CMB: kinematical and intrinsic contributions*
Dr. Omar Roldán
Pós-doutorando – UFRJ
*Evento de presença obrigatória da disciplina seminários
Resumo:
The aberration and Doppler coupling effects of the Cosmic Microwave Background (CMB) were measured by the Planck satellite. The most straightforward interpretation leads to a direct detection of our peculiar velocity, consistent with the measurement of the well-known dipole. We show however, that in some cases a primordial dipolar potential can also produce such effects. But in addition it produces other signatures due to integrated terms which we will discuss in some detail. We also discuss how aberration measurements can be used to constraint some models which introduce super-horizon perturbations to explain the hemispherical asymmetry. This work has also been used to infer the Intrinsic Dipole. Finally we also discuss about CMB anisotropies at all orders and the non-linear Sachs-Wolfe formula.
Data: 22 de outubro de 2021 – (sexta-feira) – Horário: 10h15min
Link de acesso ao canal do programa no youtube: https://youtu.be/sqea8-jX35Q