Due to internet problems this is a re-recording of Maheen Hemani's presentation for Speaker's Night Online from May 14, 2024,
"An Astrophysical Mystery: Galaxy Quenching at High Redshifts."
Ms Maheen Hemani is an undergraduate at York University.
Abstract: One of the significant mysteries in the field of extragalactic astrophysics is the observed existence of quenched galaxies at high redshifts. These galaxies present signs of halted star formation in the earlier epochs. It is important to know how abundant these galaxies are and the possible causes of their quenching to better understand galaxy formation.
In this talk, Maheen will go over what makes this observation a mystery and what different cosmological simulations tell us about it. She will also touch on the work she has done in this area with the Thesan simulation based on the Lambda-CDM model of cosmology.