Physics Seminar
Friday, October 21, 2022, 2 pm to 3 pm
Campus:
Dayton
OH112
Audience:
Current Students
Faculty
Staff
Alumni
The public
Physics Seminar
Dr.Marc Seigar
The University of Toledo
Title: Non-barred Ringed Galaxies: The Curious Case of LEDA 1000714
Abstract: In this talk, I will introduce the concept of non-barred ringed galaxies in the context of galaxy morphology and structure. Cosmological simulations of structure formation cannot currently produce non-barred ringed galaxies and the prevailing theory is that rings form due to the presence of a non-axisymmetric perturbation, typically a bar. To find non-barred ringed galaxies, therefore raises some questions about our ideas of how galaxies form, especially in these rare cases. I will introduce three types of non-barred ringed galaxies, polar-ring galaxies, collisional-ring galaxies, and Hoag-type galaxies. I will give an overview of Hoag’s object, the archetypical non-barred ringed galaxies. The talk will be mainly focused on the Hoag-type galaxy, LEDA 1000714, and how we uncovered the existence of a diffuse red ring in this object.
October 21, 2022
2:00 PM
112 Oelman Hall/WebEx
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