Reconstructing cosmology with LOFAR

The LOFAR Two-metre Sky Survey (LoTSS) opens a new observational window for modern cosmology. In this presentation I will describe how the second data release of LoTSS allows us to reconstruct several aspects of today's standard model of cosmology. The rich multi-frequency data of the LoTSS deep fields play a crucial role to break several parameter degeneracies and the cross-correlation of LoTSS radio sources with observations of the cosmic microwave anisotropies  (Planck) and optical galaxy redshift surveys (eBOSS) allowed us to measure several astrophysical and cosmological parameters. On intermediate scales we find excellent agreement with the standard model of cosmology, whereas we observe tensions at the largest observable scales. To conclude, I will provide an outlook on the currently ongoing analysis of the third LoTSS data release. 

Talk in presence and via Zoom:

https://uni-hamburg.zoom.us/j/66006535328?pwd=aGkrSjJIYmZjK0VpYlpGL0ZrdHg2UT09