Speaker
Description
One of the most powerful tests of our cosmological model and of new physics is to determine the growth of large-scale structure with time. Motivated by this and by reports of tensions in structure growth, in the first part of my talk I will show state-of-the-art determinations of cosmic structure growth using CMB gravitational lensing measurements from the Atacama Cosmology Telescope (ACT), in auto-correlation and cross-correlation with unWISE galaxies. I will discuss the implications of our ACT DR6 lensing results for the validity of our standard cosmological model as well as for key cosmological parameters.
I will also present first measurements of a new probe of large-scale structure and the early universe: the cosmic velocity field reconstructed from the kinetic SZ (kSZ) effect. After showing our early measurements of this signal with ACT, I will discuss ongoing efforts to reconstruct the velocity field at increasingly high precision with this new technique, and I will explain why kSZ velocity reconstruction may be the key to systematics-free measurements of primordial non-Gaussianity from large-scale structure.
| Would you be interested in presenting a poster if the conference is oversubcribed? | No |
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