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Challenges in Cosmic Shear
Published on Feb 4, 20253917 Views
Recent observations have shown that the Universe is dominated by two mysterious components, Dark Matter and Dark Energy. Their nature pose some of the most pressing questions in fundamental physics to
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Presentation
Challenges in Cosmic Shear00:00
Cosmology00:28
Gravity02:55
Weak Lensing Shear Measurement08:43
Typical shear of a few %11:31
Cosmic Shear Measurements16:44
COSMOS Dark Matter Map (1)17:01
COSMOS Dark Matter Map (2)17:29
Cosmological Constraints17:31
Dark Energy Constraints18:21
Wide-Field Instruments19:40
Challenges for Cosmic Shear20:16
Shear Measurement Problem21:06
Requirements22:12
Shear Measurement Methods29:17
Toy Model30:55
Noise Bias31:42
Ways Forward33:59
Conclusions36:08