Seminário com Dr. Omar Roldán – 22 de outubro de 2021 (sexta-feira) – 10h15min

19/10/2021 11:28

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.

Most of the seminar is based on the paper:
https://arxiv.org/abs/1603.02664
https://arxiv.org/abs/1706.08428
Other References:
https://arxiv.org/abs/1708.00441
https://arxiv.org/abs/2011.08385

Data: 22 de outubro de 2021 – (sexta-feira) – Horário: 10h15min

Link de acesso ao canal do programa no youtube: https://youtu.be/sqea8-jX35Q

Comments

Facebook Auto Publish Powered By : XYZScripts.com