Contributed Talk - Splinter RadioSky

Wednesday, 14 September 2022, 14:42   (SFG 1030 / virtual RadioSky)

SKA synergies: LoTSS DR2 cosmology results

Jinglan Zheng et al.
University Bielefeld

As part of the SKA synergies, here we present a series of work of the cosmology group in the LOFAR survey Key Science Projects, we have studied several different probes with LoTSS Deep Fields, LoTSS DR2 and other surveys in order to understand the radio sources better and create a comprehensive set of constraints on cosmological parameters. In particular, we look at: a) the auto correlation of lotss and dipole results(Hale et al.)(Bohme et al.); b) the cross-correlation with CMB lensing and Integrated Sache-Wolfe effect (Nakoneczny et al.); c) the cross-correlation with optical spectroscopic survey eBOSS(Zheng et al.); and d) the joint cosmological parameter estimation with lotss combining a), b), c) and other surveys(Heneka et al.). We provide competitive constraints on the bias and redshift distribution of radio sources, BAO constraints and cosmological parameter constraints such as Omega_m, sigma_8, w, etc, compared with the results using LoTSS DR1. The methods could be very useful for the future SKA continuum survey.