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Date: |
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Time: |
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Tuesday, 17 Sept 2024 |
Video-Recording for any system with MP4-support - Video.mp4 (ca. 318 Mb) |
13:15 – 14:15 |
"Illuminating
the dark Universe:
Precision
cosmology from weak lensing and galaxy clustering"
Judit
Prat Martí
(Nordita/SU)
Abstract:
In this colloquium, I will explore recent
advancements in cosmology using weak
gravitational
lensing and galaxy clustering, focusing on results
from the Dark
Energy Survey (DES). I'll examine the
current status of the ΛCDM model,
discussing
its successes and emerging challenges, including hints of evolving
dark energy and tensions between
early and late Universe probes.
I
will present the latest techniques for inferring cosmological information from
photometric
galaxy surveys, emphasizing the power of combining multiple probes
in the "3x2pt"
analysis. I'll then discuss current limitations in cosmological analyses,
along
with future directions including the use of higher-order statistics through
simulation-based
inference (focusing on persistent homology), data combination
strategies,
and improved small-scale modeling. These advancements will offer
insights
into how we can probe the dark Universe in this era of precision cosmology,
leveraging
observations of the late-time universe from present and upcoming surveys.