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BSM PANDEMIC Seminars
BSM Pandemic Seminar - Bryan Ostdiek (Harvard)
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Description
Bryan Ostdiek (Harvard)
Title: Dark Matter (Sub)Halos with Image Segmentation
Abstract:
Dark matter is responsible for the structure of the universe, and studying small self-bound dark matter structures can yield clues about the particle nature of dark matter. Unfortunately, star formation is suppressed in these light structures, which makes detecting and studying them very challenging. In this talk, I develop a method to use image recognition to detect substructure within galaxy-galaxy strong lensing images. I show that the network has good accuracy and a low false-positive rate. This allows for a measurement of the subhalo mass function by simply counting the number of pixels assigned to each mass class. In the future, this will help to elucidate the nature of dark matter.
