STRW local: Regular Colloquia


Astrophysics meets cosmology: challenges and opportunities

Date: 31-10-2019
Time: 11:15 h
Author: Elisa Chisari

The weak gravitational lensing of galaxies has become a key probe of cosmology. Campaigns such as the Kilo-Degree Survey are measuring and modeling distortions of galaxy shapes over large areas of the sky to explore the nature of dark energy. In the next decade, a dramatic increase of statistical power, driven by wider and deeper surveys, will result in further opportunities to constrain the cosmological model, and this will also pose new challenges. In particular, astrophysical effects such as the intrinsic alignment of galaxies with the large-scale structure, or the impact of galaxy formation on the distribution of matter, will need to be taken into account for successful extraction of cosmological information. I will give an overview of our current understanding of these astrophysical effects and their connection to cosmological studies, and I will highlight new opportunities that will open up with the next generation experiments such as Euclid and LSST.