9º Seminário GIFT 2018

“The effect of baryons in the Large Scale Structure”

Tiago Castro (IF-UFRJ)

Observational cosmology is passing through a unique moment of grandeur with the amount of quality data growing fast. However, in order to better take advantage of this moment, data analysis tools have to keep up the pace. Understanding the effect of baryonic matter on the large-scale structure is one of the challenges to be faced in cosmology. In this seminar, I present the recent advances on the study of the effect of baryonic physics on different lensing and Cluster statistics. Making use of the Magneticum Pathfinder suite of simulations we show that the influence of luminous matter on the 1point lensing statistics of point sources is significant, enhancing the probability of magnified objects with mu>3 by a factor of 2 and the occurrence of multiple-images by a factor 5-50 depending on the source redshift and size. The effect on Cluster cosmology is shown to be strong enough to possibly bias the result of next generation survey. Our results and methodology were carefully tested in order to guarantee that our uncertainties are much smaller than the effects here presented.

*Seminário aberto para toda a comunidade e não necessita de inscrição.

 Mais informações: https://giftunifei.wordpress.com/seminario-gift-2018/