5–10 Jul 2021
Europe/Rome timezone

Testing LCDM on small scales with cluster lenses

7 Jul 2021, 17:50
35m

Speaker

Priya Natarajan (Yale University)

Description

The key elusive cosmic constituents - dark matter, dark energy and black holes - play a fundamental role in shaping the visible universe. In this talk, I will discuss the current status of our understanding of the distribution of dark matter on small-scales in LCDM and the key open questions. Gravitational lensing by clusters of galaxies offers a powerful way to map dark matter and the high quality of current data permits detailed comparison with simulations of structure formation. Deep Hubble Space Telescope data in combination with ground-based follow-up spectroscopy permit the construction of high-resolution lensing derived maps of dark matter that can be used to stress-test the LCDM model. I present results from recent work that reveal tensions between the predictions of the standard cold dark matter theory and observations of cluster lenses.

Primary author

Priya Natarajan (Yale University)

Presentation materials

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