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Speaker Night – Jellyfish in the Sky: Ram-Pressure Stripping in Galaxy Clusters

April 26 @ 8:00 pm - 10:00 pm

Jellyfish in the Sky: Ram-Pressure Stripping in Galaxy Clusters

Galaxies are shaped by the environments around them, resulting in an infinite variety of shapes, colors, and dynamics.  Galaxy clusters are one of the most extreme environments in the universe, whose member galaxies are transformed by the cluster as they fall into its gravitational field. When encountering these dense environments, interactions with hot gas between members of a cluster can push gas out of a galaxy in a process called ram-pressure stripping, which results in a metamorphosis into a jellyfish galaxy before shutting off star formation. Jellyfish galaxies keep their stars and dark matter untouched, but the gas is pulled away from the galaxy resulting in a morphology similar to jellyfish tentacles – beautifully marking the transition between an isolated galaxy and a member of a cluster. This talk will discuss the processes surrounding ram pressure stripping and the dance of galaxies, dark matter, and intra-cluster gas, and will include an interpretive dance performance!

Bio: Dr. Leo Yvonne Alcorn is a postdoctoral researcher at the David A Dunlap Department of Astronomy and Astrophysics at University of Toronto and received her doctorate from Texas A&M University in 2019. Her research focuses on all aspects of galaxy clusters, but particularly the effects of the cluster environment on the properties of their member galaxies. She is expanding her areas of expertise into astronomical pedagogy and the relationship between astronomy and speculative fiction. In her free time, she screams into the abyss of the night sky, reads and writes tomes of horror and wonder (she is a cosmic horror fiction enthusiast), and dutifully serves her two feline companions, Eris and Kobu.

This will be an in-person meeting only but will be available on our website a few days later.


April 26
8:00 pm - 10:00 pm
Event Category:


UTM Davis (DV) 3140


Program Committee