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Physics & Astronomy Seminar: Learning Around Galactic Foregrounds

September 18 @ 2:30 pm

Samuel Gagnon-Hartman,
Bishop’s University

The highly-redshifted 21 cm neutral hydrogen emission line is widely accepted as a potent probe of the early universe, particularly the Epoch of Reionization. This cosmological signal is obfuscated by intragalactic sources, which are 10^5 times brighter than the desired signal. It has been demonstrated that these galactic foregrounds are confined to a particular region of cylindrical Fourier space dubbed “the wedge”. Various techniques have been proposed to recover the lost cosmological information within the wedge by closely modelling the Milky Way’s radio footprint. I demonstrate that after simply deleting all information within the wedge, a Convolutional Neural Network may be trained to recover the lost cosmological information by exploiting the non-Gaussianity of the cosmological signal.

If you are interested in joining in this seminar, please contact Jean Porter at jporter@ubishops.ca to obtain the zoom link.

Details

Date:
September 18
Time:
2:30 pm
Event Category:

Venue

Online

Organizer

Physics Department
Phone:
819-822-9600 ext. 2355
Email:
jporter@UBishops.ca