COLÓQUIO DO DEPARTAMENTO DE FÍSICA MATEMÁTICA
Dia 06/03/2018 (terça-feira) - 11h - Sala Jayme Tiomno
"1-point lensing statistics in cosmology"
Palestrante: Miguel Quartin, UFRJ
Abstract:
Lensing in cosmology is usually discussed in terms of the Cosmic Shear, a 2-point correlation statistic. The lensing probability distribution functions (PDF) of convergence, shear and magnification, on the other hand, carry extra information which can be recovered in a different way. I will discuss some challenges in extracting this signal, which requires an accurate modelling of the cosmological dependence of the PDFs. I will focus on the effect of baryons, computed using the Magneticum suite of simulations, which have a significant impact on the high magnification and high convergence regions of the PDFs. I will also discuss how the angular resolution of the observations must be taken into account when modelling the PDFs.
